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Windows","i-lucide-cpu","/csharp/system-programming-windows","01.csharp/07.system-programming-windows",[259,263,267,271,275,279,283,287,291,295,299,303,307,311,315,319,323,327,331,335,339,343,347,351,355,359,363,367,371,375],{"title":260,"path":261,"stem":262},"Як Працює Операційна Система","/csharp/system-programming-windows/how-os-works","01.csharp/07.system-programming-windows/01.how-os-works",{"title":264,"path":265,"stem":266},"Процеси в .NET — API та Запуск","/csharp/system-programming-windows/processes-in-dotnet","01.csharp/07.system-programming-windows/02.processes-in-dotnet",{"title":268,"path":269,"stem":270},"Процеси в .NET — IPC та Міжпроцесна Комунікація","/csharp/system-programming-windows/02a.processes-ipc","01.csharp/07.system-programming-windows/02a.processes-ipc",{"title":272,"path":273,"stem":274},"Application Domains та Збірки — AppDomain і 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Primitives","/csharp/system-programming-windows/synchronization-advanced","01.csharp/07.system-programming-windows/07.synchronization-advanced",{"title":308,"path":309,"stem":310},"Синхронізація — Interlocked, Volatile та Lock-Free Структури","/csharp/system-programming-windows/07a.synchronization-advanced-walkthrough","01.csharp/07.system-programming-windows/07a.synchronization-advanced-walkthrough",{"title":312,"path":313,"stem":314},"Interlocked, CAS та Lock-Free Структури","/csharp/system-programming-windows/interlocked-cas-lockfree","01.csharp/07.system-programming-windows/08.interlocked-cas-lockfree",{"title":316,"path":317,"stem":318},"Volatile, Memory Model та Spinning","/csharp/system-programming-windows/08a.volatile-memory-model","01.csharp/07.system-programming-windows/08a.volatile-memory-model",{"title":320,"path":321,"stem":322},"ThreadPool — Пул Потоків для Ефективного 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DbProviderFactory — провайдер-незалежний код","/csharp/ado-net/provider-factory","01.csharp/09.ado-net/07.provider-factory",{"title":438,"path":439,"stem":440},"9.8. Асинхронний доступ до даних","/csharp/ado-net/async-data-access","01.csharp/09.ado-net/08.async-data-access",{"title":442,"path":443,"stem":444},"9.9. Від'єднаний режим: DataSet, DataTable, DataRow","/csharp/ado-net/disconnected-mode-dataset","01.csharp/09.ado-net/09.disconnected-mode-dataset",{"title":446,"path":447,"stem":448},"9.10. DataAdapter — міст між DataSet та базою даних","/csharp/ado-net/data-adapter","01.csharp/09.ado-net/10.data-adapter",{"title":450,"path":451,"stem":452},"9.11. Data Mapper та Repository: Архітектура доступу до даних","/csharp/ado-net/data-mapper-repository","01.csharp/09.ado-net/11.data-mapper-repository",{"title":454,"path":455,"stem":456},"9.12. Identity Map, Unit of Work та Specification Pattern","/csharp/ado-net/advanced-patterns","01.csharp/09.ado-net/12.advanced-patterns",{"title":458,"icon":255,"path":459,"stem":460,"children":461,"page":59},"Ef Core","/csharp/ef-core","01.csharp/10.ef-core",[462,466,470,474,478,482,486,490,494,498,502,506,510,514,518,522,526,532,538,542,546,550,554,558,562,566,570,574,578,582,586,590,594,598,602,606,610,614,618,622,626,630,634,638,642,646],{"title":463,"path":464,"stem":465},"Що таке ORM? Від SQL до об'єктів","/csharp/ef-core/what-is-orm","01.csharp/10.ef-core/01.what-is-orm",{"title":467,"path":468,"stem":469},"Перший проєкт — від нуля до CRUD","/csharp/ef-core/first-project","01.csharp/10.ef-core/02.first-project",{"title":471,"path":472,"stem":473},"DbContext — Серце EF Core","/csharp/ef-core/dbcontext-deep-dive","01.csharp/10.ef-core/03.dbcontext-deep-dive",{"title":475,"path":476,"stem":477},"Провайдери баз даних — Архітектура та Вибір СУБД","/csharp/ef-core/database-providers","01.csharp/10.ef-core/04.database-providers",{"title":479,"path":480,"stem":481},"Конвенції EF Core — Магія без конфігурації","/csharp/ef-core/conventions","01.csharp/10.ef-core/05.conventions",{"title":483,"path":484,"stem":485},"Fluent API та Data Annotations — Явна конфігурація моделі","/csharp/ef-core/fluent-api-vs-annotations","01.csharp/10.ef-core/06.fluent-api-vs-annotations",{"title":487,"path":488,"stem":489},"Зв'язки — One-to-One та One-to-Many","/csharp/ef-core/relationships-basics","01.csharp/10.ef-core/07.relationships-basics",{"title":491,"path":492,"stem":493},"Зв'язки Advanced — Many-to-Many та Складні Сценарії","/csharp/ef-core/relationships-advanced","01.csharp/10.ef-core/08.relationships-advanced",{"title":495,"path":496,"stem":497},"Властивості — Типи, Конвертери, Компаратори (Частина 1)","/csharp/ef-core/property-configuration-part1","01.csharp/10.ef-core/09.property-configuration-part1",{"title":499,"path":500,"stem":501},"Властивості — Value Comparers, Generators, Shadow Properties (Частина 2)","/csharp/ef-core/property-configuration-part2","01.csharp/10.ef-core/09.property-configuration-part2",{"title":503,"path":504,"stem":505},"Складні типи — Owned Types та Complex Types (Частина 1)","/csharp/ef-core/complex-types-owned-part1","01.csharp/10.ef-core/10.complex-types-owned-part1",{"title":507,"path":508,"stem":509},"Складні типи — Complex Types, Keyless Entities, Порівняння (Частина 2)","/csharp/ef-core/complex-types-owned-part2","01.csharp/10.ef-core/10.complex-types-owned-part2",{"title":511,"path":512,"stem":513},"JSON Columns — Складні дані у JSON (Частина 1)","/csharp/ef-core/json-columns-part1","01.csharp/10.ef-core/11.json-columns-part1",{"title":515,"path":516,"stem":517},"JSON Columns — Value Comparers, Індекси, Провайдери (Частина 2)","/csharp/ef-core/json-columns-part2","01.csharp/10.ef-core/11.json-columns-part2",{"title":519,"path":520,"stem":521},"Успадкування — Абстрактні класи та TPH (Частина 1)","/csharp/ef-core/inheritance-part1","01.csharp/10.ef-core/12.inheritance-part1",{"title":523,"path":524,"stem":525},"Успадкування — TPT, TPC та Порівняння Стратегій (Частина 2)","/csharp/ef-core/inheritance-part2","01.csharp/10.ef-core/12.inheritance-part2",{"title":527,"path":528,"stem":529,"children":530},"Індекси, Обмеження та Схема (Частина 1)","/csharp/ef-core/indexes-constraints-part1","01.csharp/10.ef-core/13.indexes-constraints-part1",[531],{"title":527,"path":528,"stem":529},{"title":533,"path":534,"stem":535,"children":536},"Індекси, Обмеження та Схема (Частина 2)","/csharp/ef-core/indexes-constraints-part2","01.csharp/10.ef-core/13.indexes-constraints-part2",[537],{"title":533,"path":534,"stem":535},{"title":539,"path":540,"stem":541},"Seed Data — Початкові Дані (Частина 1)","/csharp/ef-core/seeding-part1","01.csharp/10.ef-core/14.seeding-part1",{"title":543,"path":544,"stem":545},"Seed Data — SQL-скрипти, Bogus та Стратегії (Частина 2)","/csharp/ef-core/seeding-part2","01.csharp/10.ef-core/14.seeding-part2",{"title":547,"path":548,"stem":549},"Global Query Filters — Глобальні Фільтри (Частина 1)","/csharp/ef-core/global-query-filters-part1","01.csharp/10.ef-core/15.global-query-filters-part1",{"title":551,"path":552,"stem":553},"Global Query Filters — Підводні камені та Інтеграція (Частина 2)","/csharp/ef-core/global-query-filters-part2","01.csharp/10.ef-core/15.global-query-filters-part2",{"title":555,"path":556,"stem":557},"LINQ-запити в EF Core (Частина 1)","/csharp/ef-core/linq-queries-part1","01.csharp/10.ef-core/16.linq-queries-part1",{"title":559,"path":560,"stem":561},"LINQ-запити в EF Core (Частина 2)","/csharp/ef-core/linq-queries-part2","01.csharp/10.ef-core/16.linq-queries-part2",{"title":563,"path":564,"stem":565},"Завантаження Пов'язаних Даних (Частина 1)","/csharp/ef-core/loading-related-data-part1","01.csharp/10.ef-core/17.loading-related-data-part1",{"title":567,"path":568,"stem":569},"Завантаження Пов'язаних Даних (Частина 2)","/csharp/ef-core/loading-related-data-part2","01.csharp/10.ef-core/17.loading-related-data-part2",{"title":571,"path":572,"stem":573},"Raw SQL, Views та Stored Procedures (Частина 1)","/csharp/ef-core/raw-sql-part1","01.csharp/10.ef-core/18.raw-sql-part1",{"title":575,"path":576,"stem":577},"Raw SQL — Stored Procedures, DbFunction та Bulk Operations (Частина 2)","/csharp/ef-core/raw-sql-part2","01.csharp/10.ef-core/18.raw-sql-part2",{"title":579,"path":580,"stem":581},"Продвинуті Запити — Compiled Queries, Bulk та Оптимізація (Частина 1)","/csharp/ef-core/advanced-queries-part1","01.csharp/10.ef-core/19.advanced-queries-part1",{"title":583,"path":584,"stem":585},"Продвинуті Запити — Query Tags, Bulk та Interceptors (Частина 2)","/csharp/ef-core/advanced-queries-part2","01.csharp/10.ef-core/19.advanced-queries-part2",{"title":587,"path":588,"stem":589},"Change Tracker — Відстеження Змін (Частина 1)","/csharp/ef-core/change-tracking-part1","01.csharp/10.ef-core/20.change-tracking-part1",{"title":591,"path":592,"stem":593},"Change Tracker — Графи Об'єктів та Disconnected (Частина 2)","/csharp/ef-core/change-tracking-part2","01.csharp/10.ef-core/20.change-tracking-part2",{"title":595,"path":596,"stem":597},"Збереження Даних та Транзакції (Частина 1)","/csharp/ef-core/saving-data-part1","01.csharp/10.ef-core/21.saving-data-part1",{"title":599,"path":600,"stem":601},"Збереження Даних — Concurrency та Outbox (Частина 2)","/csharp/ef-core/saving-data-part2","01.csharp/10.ef-core/21.saving-data-part2",{"title":603,"path":604,"stem":605},"Конкурентність та Блокування (Частина 1)","/csharp/ef-core/concurrency-part1","01.csharp/10.ef-core/22.concurrency-part1",{"title":607,"path":608,"stem":609},"Конкурентність — Дедлоки та Queue Processing (Частина 2)","/csharp/ef-core/concurrency-part2","01.csharp/10.ef-core/22.concurrency-part2",{"title":611,"path":612,"stem":613},"Міграції в EF Core — Основи (Частина 1)","/csharp/ef-core/migrations-basics-part1","01.csharp/10.ef-core/23.migrations-basics-part1",{"title":615,"path":616,"stem":617},"Міграції в EF Core — Основи (Частина 2)","/csharp/ef-core/migrations-basics-part2","01.csharp/10.ef-core/23.migrations-basics-part2",{"title":619,"path":620,"stem":621},"Міграції — Просунуті Сценарії (Частина 1)","/csharp/ef-core/migrations-advanced-part1","01.csharp/10.ef-core/24.migrations-advanced-part1",{"title":623,"path":624,"stem":625},"Міграції — Просунуті Сценарії (Частина 2)","/csharp/ef-core/migrations-advanced-part2","01.csharp/10.ef-core/24.migrations-advanced-part2",{"title":627,"path":628,"stem":629},"Управління Схемою та Database-First (Частина 1)","/csharp/ef-core/schema-management-part1","01.csharp/10.ef-core/25.schema-management-part1",{"title":631,"path":632,"stem":633},"Управління Схемою та Database-First (Частина 2)","/csharp/ef-core/schema-management-part2","01.csharp/10.ef-core/25.schema-management-part2",{"title":635,"path":636,"stem":637},"Продуктивність EF Core — Основи (Частина 1)","/csharp/ef-core/performance-fundamentals-part1","01.csharp/10.ef-core/26.performance-fundamentals-part1",{"title":639,"path":640,"stem":641},"Interceptors в EF Core (Частина 1)","/csharp/ef-core/interceptors-part1","01.csharp/10.ef-core/29.interceptors-part1",{"title":643,"path":644,"stem":645},"Interceptors в EF Core — Connection, Transaction та Materialization (Частина 2)","/csharp/ef-core/interceptors-part2","01.csharp/10.ef-core/29.interceptors-part2",{"title":647,"path":648,"stem":649},"План вивчення Entity Framework Core — Повний курс","/csharp/ef-core/implementation_plan","01.csharp/10.ef-core/implementation_plan",{"title":651,"icon":652,"path":653,"stem":654,"children":655,"page":59},"ASP.NET","i-devicon-dotnetcore","/csharp/aspnet","01.csharp/11.aspnet",[656,730,791,869,927,941,967,1057,1111,1182,1212,1289],{"title":657,"icon":658,"path":659,"stem":660,"children":661,"page":59},"Minimal API","i-lucide-network","/csharp/aspnet/minimal-api","01.csharp/11.aspnet/01.minimal-api",[662,666,670,674,678,682,686,690,694,698,702,706,710,714,718,722,726],{"title":663,"path":664,"stem":665},"Вступ до ASP.NET та еволюція фреймворку","/csharp/aspnet/minimal-api/introduction","01.csharp/11.aspnet/01.minimal-api/01.introduction",{"title":667,"path":668,"stem":669},"Перший додаток на ASP.NET Core","/csharp/aspnet/minimal-api/first-application","01.csharp/11.aspnet/01.minimal-api/02.first-application",{"title":671,"path":672,"stem":673},"WebApplication, Builder та Dependency Injection","/csharp/aspnet/minimal-api/webapplication-builder","01.csharp/11.aspnet/01.minimal-api/03.webapplication-builder",{"title":675,"path":676,"stem":677},"Конвеєр запитів та Middleware","/csharp/aspnet/minimal-api/request-pipeline-middleware","01.csharp/11.aspnet/01.minimal-api/04.request-pipeline-middleware",{"title":679,"path":680,"stem":681},"Маршрутизація в ASP.NET Core: Основи","/csharp/aspnet/minimal-api/routing-basics","01.csharp/11.aspnet/01.minimal-api/05.routing-basics",{"title":683,"path":684,"stem":685},"Маршрутизація в ASP.NET Core: Розширені можливості","/csharp/aspnet/minimal-api/routing-advanced","01.csharp/11.aspnet/01.minimal-api/06.routing-advanced",{"title":687,"path":688,"stem":689},"Статичні файли в ASP.NET Core","/csharp/aspnet/minimal-api/static-files","01.csharp/11.aspnet/01.minimal-api/07.static-files",{"title":691,"path":692,"stem":693},"Статичні Активи: MapStaticAssets (ASP.NET Core 9.0)","/csharp/aspnet/minimal-api/static-assets","01.csharp/11.aspnet/01.minimal-api/08.static-assets",{"title":695,"path":696,"stem":697},"Конфігурація в ASP.NET Core: Основи","/csharp/aspnet/minimal-api/configuration-fundamentals","01.csharp/11.aspnet/01.minimal-api/09.configuration-fundamentals",{"title":699,"path":700,"stem":701},"Конфігурація: Паттерн Options","/csharp/aspnet/minimal-api/configuration-options","01.csharp/11.aspnet/01.minimal-api/10.configuration-options",{"title":703,"path":704,"stem":705},"Логування в ASP.NET Core: Основи","/csharp/aspnet/minimal-api/logging-basics","01.csharp/11.aspnet/01.minimal-api/11.logging-basics",{"title":707,"path":708,"stem":709},"Логування: Serilog та Middleware","/csharp/aspnet/minimal-api/logging-advanced","01.csharp/11.aspnet/01.minimal-api/12.logging-advanced",{"title":711,"path":712,"stem":713},"Управління станом: HttpContext.Items та Cookies","/csharp/aspnet/minimal-api/state-management","01.csharp/11.aspnet/01.minimal-api/13.state-management",{"title":715,"path":716,"stem":717},"Стан сесії: Sessions","/csharp/aspnet/minimal-api/session-state","01.csharp/11.aspnet/01.minimal-api/14.session-state",{"title":719,"path":720,"stem":721},"Структура проєкту: від хаосу до архітектури","/csharp/aspnet/minimal-api/project-structure","01.csharp/11.aspnet/01.minimal-api/15.project-structure",{"title":723,"path":724,"stem":725},"Scalar у Minimal API: повний проєкт і Fluent OpenAPI","/csharp/aspnet/minimal-api/scalar-openapi-fluent","01.csharp/11.aspnet/01.minimal-api/16.scalar-openapi-fluent",{"title":727,"path":728,"stem":729},"Swagger / Swashbuckle у Minimal API: окремий класичний шлях","/csharp/aspnet/minimal-api/swagger-swashbuckle","01.csharp/11.aspnet/01.minimal-api/17.swagger-swashbuckle",{"title":731,"icon":658,"path":732,"stem":733,"children":734,"page":59},"API","/csharp/aspnet/api","01.csharp/11.aspnet/02.api",[735,739,743,747,751,755,759,763,767,771,775,779,783,787],{"title":736,"path":737,"stem":738},"Що таке API. Клієнт-серверна архітектура","/csharp/aspnet/api/what-is-api","01.csharp/11.aspnet/02.api/01.what-is-api",{"title":740,"path":741,"stem":742},"Формати даних: JSON, XML, TOML та бінарні формати","/csharp/aspnet/api/data-formats","01.csharp/11.aspnet/02.api/02.data-formats",{"title":744,"path":745,"stem":746},"Парадигми API та концепція REST","/csharp/aspnet/api/api-paradigms-rest","01.csharp/11.aspnet/02.api/03.api-paradigms-rest",{"title":748,"path":749,"stem":750},"HTTP-методи, статус-коди та заголовки","/csharp/aspnet/api/http-methods-status-codes","01.csharp/11.aspnet/02.api/04.http-methods-status-codes",{"title":752,"path":753,"stem":754},"Організація HTTP API за принципами REST","/csharp/aspnet/api/rest-organizing","01.csharp/11.aspnet/02.api/05.rest-organizing",{"title":756,"path":757,"stem":758},"Номенклатура URL та CRUD-операції","/csharp/aspnet/api/url-nomenclature-crud","01.csharp/11.aspnet/02.api/06.url-nomenclature-crud",{"title":760,"path":761,"stem":762},"Правила дизайну: іменування та стандарти","/csharp/aspnet/api/api-design-naming","01.csharp/11.aspnet/02.api/07.api-design-naming",{"title":764,"path":765,"stem":766},"Валідація, ліміти та обробка помилок","/csharp/aspnet/api/api-design-validation","01.csharp/11.aspnet/02.api/08.api-design-validation",{"title":768,"path":769,"stem":770},"Обробка помилок у Minimal API","/csharp/aspnet/api/error-handling-http","01.csharp/11.aspnet/02.api/09.error-handling-http",{"title":772,"path":773,"stem":774},"Ідемпотентність та синхронізація стану","/csharp/aspnet/api/idempotency-sync","01.csharp/11.aspnet/02.api/10.idempotency-sync",{"title":776,"path":777,"stem":778},"Пагінація та організація списків","/csharp/aspnet/api/pagination-lists","01.csharp/11.aspnet/02.api/11.pagination-lists",{"title":780,"path":781,"stem":782},"Безпека API, кешування та інтернаціоналізація","/csharp/aspnet/api/security-auth","01.csharp/11.aspnet/02.api/12.security-auth",{"title":784,"path":785,"stem":786},"Процес проєктування API та документування","/csharp/aspnet/api/api-design-process","01.csharp/11.aspnet/02.api/13.api-design-process",{"title":788,"path":789,"stem":790},"OpenAPI: контракт, специфікація та документація API","/csharp/aspnet/api/openapi","01.csharp/11.aspnet/02.api/14.openapi",{"title":792,"icon":793,"path":794,"stem":795,"children":796,"page":59},"Auth","i-lucide-shield-check","/csharp/aspnet/auth","01.csharp/11.aspnet/03.auth",[797,801,805,809,813,817,821,825,829,833,837,841,845,849,853,857,861,865],{"title":798,"path":799,"stem":800},"Основи аутентифікації та авторизації","/csharp/aspnet/auth/auth-fundamentals","01.csharp/11.aspnet/03.auth/01.auth-fundamentals",{"title":802,"path":803,"stem":804},"JWT-аутентифікація","/csharp/aspnet/auth/jwt-authentication","01.csharp/11.aspnet/03.auth/02.jwt-authentication",{"title":806,"path":807,"stem":808},"Авторизація: ролі, політики та resource-based доступ","/csharp/aspnet/auth/authorization-policies","01.csharp/11.aspnet/03.auth/03.authorization-policies",{"title":810,"path":811,"stem":812},"Cookie-аутентифікація та ASP.NET Core Identity","/csharp/aspnet/auth/cookie-auth-identity","01.csharp/11.aspnet/03.auth/04.cookie-auth-identity",{"title":814,"path":815,"stem":816},"JWT + Refresh Tokens (HttpOnly Cookie)","/csharp/aspnet/auth/04b.identity-auth-jwt","01.csharp/11.aspnet/03.auth/04b.identity-auth-jwt",{"title":818,"path":819,"stem":820},"Identity: Підтвердження Email та Скидання Пароля","/csharp/aspnet/auth/identity-email-confirmation","01.csharp/11.aspnet/03.auth/05.identity-email-confirmation",{"title":822,"path":823,"stem":824},"Identity: Двофакторна Аутентифікація (2FA)","/csharp/aspnet/auth/identity-two-factor","01.csharp/11.aspnet/03.auth/06.identity-two-factor",{"title":826,"path":827,"stem":828},"Identity: Внутрішня Архітектура та Кастомізація","/csharp/aspnet/auth/identity-internals","01.csharp/11.aspnet/03.auth/07.identity-internals",{"title":830,"path":831,"stem":832},"OAuth 2.0 та зовнішні провайдери","/csharp/aspnet/auth/oauth-external-providers","01.csharp/11.aspnet/03.auth/08.oauth-external-providers",{"title":834,"path":835,"stem":836},"Безпека на практиці: CORS, HTTPS та захист від атак","/csharp/aspnet/auth/security-hardening","01.csharp/11.aspnet/03.auth/09.security-hardening",{"title":838,"path":839,"stem":840},"Теорія OAuth 2.0: Поняття, Аналогії та Флоу","/csharp/aspnet/auth/oauth-theory","01.csharp/11.aspnet/03.auth/10.oauth-theory",{"title":842,"path":843,"stem":844},"OIDC, OAuth 2.0 та Keycloak в ASP.NET Core","/csharp/aspnet/auth/oidc-keycloak","01.csharp/11.aspnet/03.auth/10.oidc-keycloak",{"title":846,"path":847,"stem":848},"API Keys аутентифікація в ASP.NET Core","/csharp/aspnet/auth/api-keys","01.csharp/11.aspnet/03.auth/11.api-keys",{"title":850,"path":851,"stem":852},"Rate Limiting та Throttling в ASP.NET Core","/csharp/aspnet/auth/rate-limiting","01.csharp/11.aspnet/03.auth/12.rate-limiting",{"title":854,"path":855,"stem":856},"Refresh Token Rotation в ASP.NET Core","/csharp/aspnet/auth/refresh-token-rotation","01.csharp/11.aspnet/03.auth/13.refresh-token-rotation",{"title":858,"path":859,"stem":860},"Certificate Authentication та mTLS в ASP.NET Core","/csharp/aspnet/auth/certificate-auth","01.csharp/11.aspnet/03.auth/14.certificate-auth",{"title":862,"path":863,"stem":864},"RBAC, ABAC та ReBAC в ASP.NET Core","/csharp/aspnet/auth/rbac-abac-rebac","01.csharp/11.aspnet/03.auth/15.rbac-abac-rebac",{"title":866,"path":867,"stem":868},"Multi-tenancy та ізоляція даних в ASP.NET Core","/csharp/aspnet/auth/multi-tenancy","01.csharp/11.aspnet/03.auth/16.multi-tenancy",{"title":870,"icon":871,"path":872,"stem":873,"children":874,"page":59},"Нотифікації","i-lucide-bell","/csharp/aspnet/notifications","01.csharp/11.aspnet/04.notifications",[875,879,883,887,891,895,899,903,907,911,915,919,923],{"title":876,"path":877,"stem":878},"In-App нотифікації через базу даних","/csharp/aspnet/notifications/in-app-database-notifications","01.csharp/11.aspnet/04.notifications/01.in-app-database-notifications",{"title":880,"path":881,"stem":882},"Polling: Регулярний запит оновлень","/csharp/aspnet/notifications/polling","01.csharp/11.aspnet/04.notifications/02.polling",{"title":884,"path":885,"stem":886},"Server-Sent Events: Однострімовий push від сервера","/csharp/aspnet/notifications/server-sent-events","01.csharp/11.aspnet/04.notifications/03.server-sent-events",{"title":888,"path":889,"stem":890},"WebSockets: Двостороннє з'єднання в реальному часі","/csharp/aspnet/notifications/websockets","01.csharp/11.aspnet/04.notifications/04.websockets",{"title":892,"path":893,"stem":894},"SignalR: Абстракція над транспортами реального часу","/csharp/aspnet/notifications/signalr","01.csharp/11.aspnet/04.notifications/05.signalr",{"title":896,"path":897,"stem":898},"Background Services: Фонові задачі в ASP.NET Core","/csharp/aspnet/notifications/background-services","01.csharp/11.aspnet/04.notifications/06.background-services",{"title":900,"path":901,"stem":902},"Web Push нотифікації","/csharp/aspnet/notifications/web-push","01.csharp/11.aspnet/04.notifications/07.web-push",{"title":904,"path":905,"stem":906},"Email нотифікації","/csharp/aspnet/notifications/email-notifications","01.csharp/11.aspnet/04.notifications/08.email-notifications",{"title":908,"path":909,"stem":910},"Порівняння підходів: Як вибрати правильну технологію нотифікацій","/csharp/aspnet/notifications/choosing-the-right-approach","01.csharp/11.aspnet/04.notifications/09.choosing-the-right-approach",{"title":912,"path":913,"stem":914},"Hangfire: Надійне планування фонових задач","/csharp/aspnet/notifications/hangfire","01.csharp/11.aspnet/04.notifications/10.hangfire",{"title":916,"path":917,"stem":918},"Практика: Конвертація зображень у WebP через Hangfire","/csharp/aspnet/notifications/hangfire-image-webp","01.csharp/11.aspnet/04.notifications/11.hangfire-image-webp",{"title":920,"path":921,"stem":922},"Практика: Підготовка відео до HLS-стрімінгу через Hangfire","/csharp/aspnet/notifications/hangfire-video-hls","01.csharp/11.aspnet/04.notifications/12.hangfire-video-hls",{"title":924,"path":925,"stem":926},"Telegram-нотифікації: від одного повідомлення до масових розсилок і мульти-канального підходу","/csharp/aspnet/notifications/telegram-notifications","01.csharp/11.aspnet/04.notifications/13.telegram-notifications",{"title":928,"icon":929,"path":930,"stem":931,"children":932,"page":59},"Інтернаціоналізація","i-lucide-languages","/csharp/aspnet/i18n","01.csharp/11.aspnet/05.i18n",[933,937],{"title":934,"path":935,"stem":936},"Інтернаціоналізація (i18n) у Minimal API: від A до Я","/csharp/aspnet/i18n/internationalization","01.csharp/11.aspnet/05.i18n/01.internationalization",{"title":938,"path":939,"stem":940},"Humanizer: людиномовні рядки у .NET","/csharp/aspnet/i18n/humanizer","01.csharp/11.aspnet/05.i18n/02.humanizer",{"title":942,"icon":943,"path":944,"stem":945,"children":946,"page":59},"Кешування","i-lucide-layers","/csharp/aspnet/caching","01.csharp/11.aspnet/06.caching",[947,951,955,959,963],{"title":948,"path":949,"stem":950},"Огляд кешування: чотири рівні і коли що обирати","/csharp/aspnet/caching/caching","01.csharp/11.aspnet/06.caching/01.caching",{"title":952,"path":953,"stem":954},"IMemoryCache: кеш в оперативній пам'яті","/csharp/aspnet/caching/memory-cache","01.csharp/11.aspnet/06.caching/02.memory-cache",{"title":956,"path":957,"stem":958},"IDistributedCache і Redis: розподілений кеш","/csharp/aspnet/caching/distributed-cache","01.csharp/11.aspnet/06.caching/03.distributed-cache",{"title":960,"path":961,"stem":962},"Response Cache: HTTP-кешування через Cache-Control","/csharp/aspnet/caching/response-cache","01.csharp/11.aspnet/06.caching/04.response-cache",{"title":964,"path":965,"stem":966},"Output Cache: серверний кеш HTTP-відповідей (.NET 7+)","/csharp/aspnet/caching/output-cache","01.csharp/11.aspnet/06.caching/05.output-cache",{"title":968,"icon":969,"path":970,"stem":971,"children":972,"page":59},"Тестування","i-lucide-test-tube","/csharp/aspnet/testing","01.csharp/11.aspnet/07.testing",[973,977,981,985,989,993,997,1001,1005,1009,1013,1017,1021,1025,1029,1033,1037,1041,1045,1049,1053],{"title":974,"path":975,"stem":976},"Що таке тестування? Від інтуїції до науки","/csharp/aspnet/testing/what-is-testing","01.csharp/11.aspnet/07.testing/01.what-is-testing",{"title":978,"path":979,"stem":980},"Піраміда тестування — Стратегія, а не Догма","/csharp/aspnet/testing/testing-pyramid","01.csharp/11.aspnet/07.testing/02.testing-pyramid",{"title":982,"path":983,"stem":984},"Дві Школи Тестування — Лондон проти Детройту","/csharp/aspnet/testing/testing-schools","01.csharp/11.aspnet/07.testing/03.testing-schools",{"title":986,"path":987,"stem":988},"TDD та BDD — Тести як Дизайн-інструмент","/csharp/aspnet/testing/tdd-and-bdd","01.csharp/11.aspnet/07.testing/04.tdd-and-bdd",{"title":990,"path":991,"stem":992},"Що саме тестувати — Техніки аналізу та Циклomatична складність","/csharp/aspnet/testing/what-to-test","01.csharp/11.aspnet/07.testing/05.what-to-test",{"title":994,"path":995,"stem":996},"Тестові Фреймворки — Навіщо вони і що всередині","/csharp/aspnet/testing/test-frameworks","01.csharp/11.aspnet/07.testing/06.test-frameworks",{"title":998,"path":999,"stem":1000},"xUnit — Факти, Теорії та Lifecycle тестів","/csharp/aspnet/testing/xunit-basics","01.csharp/11.aspnet/07.testing/07.xunit-basics",{"title":1002,"path":1003,"stem":1004},"xUnit Advanced — Fixtures, Кастомізація та Розширення","/csharp/aspnet/testing/xunit-advanced","01.csharp/11.aspnet/07.testing/08.xunit-advanced",{"title":1006,"path":1007,"stem":1008},"Moq — Глибоке занурення в мокування","/csharp/aspnet/testing/mocking-with-moq","01.csharp/11.aspnet/07.testing/09.mocking-with-moq",{"title":1010,"path":1011,"stem":1012},"Тестування Баз Даних — EF Core, SQLite та Testcontainers","/csharp/aspnet/testing/database-testing","01.csharp/11.aspnet/07.testing/10.database-testing",{"title":1014,"path":1015,"stem":1016},"Integration Testing — Частина 1 [Теорія та WebApplicationFactory]","/csharp/aspnet/testing/integration-testing","01.csharp/11.aspnet/07.testing/11.integration-testing",{"title":1018,"path":1019,"stem":1020},"Інтеграційне тестування — Практика","/csharp/aspnet/testing/11a.integration-testing-practice","01.csharp/11.aspnet/07.testing/11a.integration-testing-practice",{"title":1022,"path":1023,"stem":1024},"Integration Testing — Частина 2 [Просунуті Сценарії та Testcontainers]","/csharp/aspnet/testing/integration-testing-advanced","01.csharp/11.aspnet/07.testing/12.integration-testing-advanced",{"title":1026,"path":1027,"stem":1028},"Професійний Postman: Колекції, Змінні та GitHub Інтеграція","/csharp/aspnet/testing/postman-professional","01.csharp/11.aspnet/07.testing/13.postman-professional",{"title":1030,"path":1031,"stem":1032},"HttpClient у Тестах Частина 1: Архітектура та MockHttpMessageHandler","/csharp/aspnet/testing/httpclient-testing","01.csharp/11.aspnet/07.testing/14.httpclient-testing",{"title":1034,"path":1035,"stem":1036},"HttpClient у Тестах Частина 2: WireMock.Net та Resilience","/csharp/aspnet/testing/wiremock-net","01.csharp/11.aspnet/07.testing/15.wiremock-net",{"title":1038,"path":1039,"stem":1040},"Патерни та Анти-патерни Тестування: Test Smells","/csharp/aspnet/testing/testing-patterns","01.csharp/11.aspnet/07.testing/16.testing-patterns",{"title":1042,"path":1043,"stem":1044},"Просунуті інструменти: Time, Snapshots та Властивості","/csharp/aspnet/testing/advanced-testing-tools","01.csharp/11.aspnet/07.testing/17.advanced-testing-tools",{"title":1046,"path":1047,"stem":1048},"Тестування Архітектури з NetArchTest","/csharp/aspnet/testing/architecture-testing","01.csharp/11.aspnet/07.testing/18.architecture-testing",{"title":1050,"path":1051,"stem":1052},"Тестування Продуктивності: BenchmarkDotNet, NBomber та k6","/csharp/aspnet/testing/performance-testing","01.csharp/11.aspnet/07.testing/19.performance-testing",{"title":1054,"path":1055,"stem":1056},"Залишок плану для курсу \"Тестування ASP.NET Minimal API\"","/csharp/aspnet/testing/remaining_plan","01.csharp/11.aspnet/07.testing/remaining_plan",{"title":1058,"icon":1059,"path":1060,"stem":1061,"children":1062,"page":59},"Платежі","i-lucide-credit-card","/csharp/aspnet/payments","01.csharp/11.aspnet/08.payments",[1063,1067,1071,1075,1079,1083,1087,1091,1095,1099,1103,1107],{"title":1064,"path":1065,"stem":1066},"Основи платіжної інфраструктури","/csharp/aspnet/payments/payment-fundamentals","01.csharp/11.aspnet/08.payments/01.payment-fundamentals",{"title":1068,"path":1069,"stem":1070},"Методи оплати в Україні","/csharp/aspnet/payments/payment-methods-ukraine","01.csharp/11.aspnet/08.payments/02.payment-methods-ukraine",{"title":1072,"path":1073,"stem":1074},"PCI DSS та безпека платежів","/csharp/aspnet/payments/pci-dss-security","01.csharp/11.aspnet/08.payments/03.pci-dss-security",{"title":1076,"path":1077,"stem":1078},"Архітектура платіжної підсистеми","/csharp/aspnet/payments/payment-architecture","01.csharp/11.aspnet/08.payments/04.payment-architecture",{"title":1080,"path":1081,"stem":1082},"Інтеграція LiqPay (ПриватБанк)","/csharp/aspnet/payments/liqpay-integration","01.csharp/11.aspnet/08.payments/05.liqpay-integration",{"title":1084,"path":1085,"stem":1086},"Інтеграція Monobank Acquiring API","/csharp/aspnet/payments/monobank-acquiring","01.csharp/11.aspnet/08.payments/06.monobank-acquiring",{"title":1088,"path":1089,"stem":1090},"Інтеграція Stripe","/csharp/aspnet/payments/stripe-integration","01.csharp/11.aspnet/08.payments/07.stripe-integration",{"title":1092,"path":1093,"stem":1094},"Webhooks — глибоке занурення","/csharp/aspnet/payments/webhooks-deep-dive","01.csharp/11.aspnet/08.payments/08.webhooks-deep-dive",{"title":1096,"path":1097,"stem":1098},"Підписки та рекурентні платежі","/csharp/aspnet/payments/subscriptions-recurring","01.csharp/11.aspnet/08.payments/09.subscriptions-recurring",{"title":1100,"path":1101,"stem":1102},"Повернення коштів та диспути","/csharp/aspnet/payments/refunds-disputes","01.csharp/11.aspnet/08.payments/10.refunds-disputes",{"title":1104,"path":1105,"stem":1106},"Тестування платіжних інтеграцій","/csharp/aspnet/payments/testing-payments","01.csharp/11.aspnet/08.payments/11.testing-payments",{"title":1108,"path":1109,"stem":1110},"Чекліст виходу в Production","/csharp/aspnet/payments/production-checklist","01.csharp/11.aspnet/08.payments/12.production-checklist",{"title":1112,"icon":1113,"items":1114,"path":1127,"stem":1128,"children":1129,"page":59},"Популярні бібліотеки","lucide:box",[1115,1116,1117,1118,1119,1120,1121,1122,1123,1124,1125,1126],"01.fluent-validation","02.mapster","03.erroror-result-pattern","04.serilog","05.mediatr","06.polly","07.health-checks","08.feature-management","09.fluent-email","10.quest-pdf","11.bogus","12.humanizer-guard","/csharp/aspnet/libraries","01.csharp/11.aspnet/09.libraries",[1130,1134,1138,1142,1146,1150,1154,1158,1162,1166,1170,1174,1178],{"title":1131,"path":1132,"stem":1133},"Валідація з FluentValidation в ASP.NET Core","/csharp/aspnet/libraries/fluent-validation","01.csharp/11.aspnet/09.libraries/01.fluent-validation",{"title":1135,"path":1136,"stem":1137},"Маппінг об","/csharp/aspnet/libraries/mapster","01.csharp/11.aspnet/09.libraries/02.mapster",{"title":1139,"path":1140,"stem":1141},"Обробка помилок з ErrorOr та Result Pattern в ASP.NET Core","/csharp/aspnet/libraries/erroror-result-pattern","01.csharp/11.aspnet/09.libraries/03.erroror-result-pattern",{"title":1143,"path":1144,"stem":1145},"Структуроване логування з Serilog в ASP.NET Core","/csharp/aspnet/libraries/serilog","01.csharp/11.aspnet/09.libraries/04.serilog",{"title":1147,"path":1148,"stem":1149},"CQRS та Mediator з MediatR в ASP.NET Core","/csharp/aspnet/libraries/mediatr","01.csharp/11.aspnet/09.libraries/05.mediatr",{"title":1151,"path":1152,"stem":1153},"Відмовостійкість з Polly в ASP.NET Core","/csharp/aspnet/libraries/polly","01.csharp/11.aspnet/09.libraries/06.polly",{"title":1155,"path":1156,"stem":1157},"Health Checks в ASP.NET Core","/csharp/aspnet/libraries/health-checks","01.csharp/11.aspnet/09.libraries/07.health-checks",{"title":1159,"path":1160,"stem":1161},"Feature Management та Feature Flags в ASP.NET Core","/csharp/aspnet/libraries/feature-management","01.csharp/11.aspnet/09.libraries/08.feature-management",{"title":1163,"path":1164,"stem":1165},"Відправка Email з FluentEmail в ASP.NET Core","/csharp/aspnet/libraries/fluent-email","01.csharp/11.aspnet/09.libraries/09.fluent-email",{"title":1167,"path":1168,"stem":1169},"Генерація PDF з QuestPDF в ASP.NET Core","/csharp/aspnet/libraries/quest-pdf","01.csharp/11.aspnet/09.libraries/10.quest-pdf",{"title":1171,"path":1172,"stem":1173},"Генерація тестових даних з Bogus в ASP.NET Core","/csharp/aspnet/libraries/bogus","01.csharp/11.aspnet/09.libraries/11.bogus",{"title":1175,"path":1176,"stem":1177},"Humanizer та Guard Clauses в ASP.NET Core","/csharp/aspnet/libraries/humanizer-guard","01.csharp/11.aspnet/09.libraries/12.humanizer-guard",{"title":1179,"path":1180,"stem":1181},"План модуля 10.libraries — Популярні бібліотеки ASP.NET","/csharp/aspnet/libraries/plan","01.csharp/11.aspnet/09.libraries/plan",{"title":1183,"icon":1184,"path":1185,"stem":1186,"children":1187,"page":59},"Razor Pages","i-lucide-layout-template","/csharp/aspnet/razor-pages","01.csharp/11.aspnet/10.razor-pages",[1188,1192,1196,1200,1204,1208],{"title":1189,"path":1190,"stem":1191},"Від Minimal API до Razor Pages: концептуальний перехід","/csharp/aspnet/razor-pages/from-minimal-api","01.csharp/11.aspnet/10.razor-pages/01.from-minimal-api",{"title":1193,"path":1194,"stem":1195},"PageModel: логіка сторінки Razor Pages","/csharp/aspnet/razor-pages/page-model","01.csharp/11.aspnet/10.razor-pages/02.page-model",{"title":1197,"path":1198,"stem":1199},"Razor синтаксис: шаблонізатор у .cshtml","/csharp/aspnet/razor-pages/razor-syntax","01.csharp/11.aspnet/10.razor-pages/03.razor-syntax",{"title":1201,"path":1202,"stem":1203},"Tag Helpers: типізований HTML","/csharp/aspnet/razor-pages/tag-helpers","01.csharp/11.aspnet/10.razor-pages/04.tag-helpers",{"title":1205,"path":1206,"stem":1207},"Форми і валідація: повний цикл обробки даних","/csharp/aspnet/razor-pages/forms-validation","01.csharp/11.aspnet/10.razor-pages/05.forms-validation",{"title":1209,"path":1210,"stem":1211},"Практичний проєкт: TaskManager на Razor Pages","/csharp/aspnet/razor-pages/project-task-manager","01.csharp/11.aspnet/10.razor-pages/06.project-task-manager",{"title":1213,"path":1214,"stem":1215,"children":1216,"page":59},"ASP.NET Core MVC","/csharp/aspnet/mvc","01.csharp/11.aspnet/11.mvc",[1217,1221,1225,1229,1233,1237,1241,1245,1249,1253,1257,1261,1265,1269,1273,1277,1281,1285],{"title":1218,"path":1219,"stem":1220},"Патерн MVC: архітектура, що змінила веб","/csharp/aspnet/mvc/mvc-pattern","01.csharp/11.aspnet/11.mvc/01.mvc-pattern",{"title":1222,"path":1223,"stem":1224},"Від Razor Pages до MVC: концептуальний перехід","/csharp/aspnet/mvc/from-razor-pages","01.csharp/11.aspnet/11.mvc/02.from-razor-pages",{"title":1226,"path":1227,"stem":1228},"Controllers та Actions: серце MVC","/csharp/aspnet/mvc/controllers-actions","01.csharp/11.aspnet/11.mvc/03.controllers-actions",{"title":1230,"path":1231,"stem":1232},"Маршрутизація в MVC: Convention vs Attribute Routing","/csharp/aspnet/mvc/routing-mvc","01.csharp/11.aspnet/11.mvc/04.routing-mvc",{"title":1234,"path":1235,"stem":1236},"Model Binding: від HTTP до C#","/csharp/aspnet/mvc/model-binding","01.csharp/11.aspnet/11.mvc/05.model-binding",{"title":1238,"path":1239,"stem":1240},"Views, ViewData, ViewBag, TempData і ViewModel","/csharp/aspnet/mvc/views-viewdata-tempdata","01.csharp/11.aspnet/11.mvc/06.views-viewdata-tempdata",{"title":1242,"path":1243,"stem":1244},"Filters: аспектно-орієнтоване програмування в MVC","/csharp/aspnet/mvc/filters","01.csharp/11.aspnet/11.mvc/07.filters",{"title":1246,"path":1247,"stem":1248},"Areas: структурування великих застосунків","/csharp/aspnet/mvc/areas","01.csharp/11.aspnet/11.mvc/08.areas",{"title":1250,"path":1251,"stem":1252},"View Components: повторювані незалежні блоки UI","/csharp/aspnet/mvc/view-components","01.csharp/11.aspnet/11.mvc/09.view-components",{"title":1254,"path":1255,"stem":1256},"Display та Editor Templates","/csharp/aspnet/mvc/display-editor-templates","01.csharp/11.aspnet/11.mvc/10.display-editor-templates",{"title":1258,"path":1259,"stem":1260},"Валідація: IValidatableObject та FluentValidation","/csharp/aspnet/mvc/validation-advanced","01.csharp/11.aspnet/11.mvc/11.validation-advanced",{"title":1262,"path":1263,"stem":1264},"HTMX: інтерактивність через HTML-атрибути","/csharp/aspnet/mvc/htmx","01.csharp/11.aspnet/11.mvc/12.htmx",{"title":1266,"path":1267,"stem":1268},"HTMX у ASP.NET Core MVC: серверна інтеграція","/csharp/aspnet/mvc/ajax-htmx-mvc","01.csharp/11.aspnet/11.mvc/13.ajax-htmx-mvc",{"title":1270,"path":1271,"stem":1272},"Практичний проєкт: Каталог товарів з HTMX","/csharp/aspnet/mvc/htmx-project","01.csharp/11.aspnet/11.mvc/14.htmx-project",{"title":1274,"path":1275,"stem":1276},"Завантаження та обробка файлів","/csharp/aspnet/mvc/file-upload","01.csharp/11.aspnet/11.mvc/15.file-upload",{"title":1278,"path":1279,"stem":1280},"Глобалізація та Локалізація MVC","/csharp/aspnet/mvc/globalization-localization","01.csharp/11.aspnet/11.mvc/16.globalization-localization",{"title":1282,"path":1283,"stem":1284},"Підсумковий проєкт: Блог-платформа","/csharp/aspnet/mvc/mvc-project","01.csharp/11.aspnet/11.mvc/17.mvc-project",{"title":1286,"path":1287,"stem":1288},"План курсу: ASP.NET Core MVC","/csharp/aspnet/mvc/plan","01.csharp/11.aspnet/11.mvc/plan",{"title":1290,"path":1291,"stem":1292,"children":1293,"page":59},"Web Api","/csharp/aspnet/web-api","01.csharp/11.aspnet/12.web-api",[1294,1298,1302,1306,1310,1314,1318,1322,1326,1330,1334,1338,1342],{"title":1295,"path":1296,"stem":1297},"Від Minimal API до Controller-based API","/csharp/aspnet/web-api/from-minimal-api-to-controllers","01.csharp/11.aspnet/12.web-api/01.from-minimal-api-to-controllers",{"title":1299,"path":1300,"stem":1301},"ControllerBase, ActionResult\u003CT> та Response Types","/csharp/aspnet/web-api/controller-base-actionresult","01.csharp/11.aspnet/12.web-api/02.controller-base-actionresult",{"title":1303,"path":1304,"stem":1305},"Content Negotiation - JSON, XML та власні форматери","/csharp/aspnet/web-api/content-negotiation","01.csharp/11.aspnet/12.web-api/03.content-negotiation",{"title":1307,"path":1308,"stem":1309},"Версіонування API","/csharp/aspnet/web-api/api-versioning","01.csharp/11.aspnet/12.web-api/04.api-versioning",{"title":1311,"path":1312,"stem":1313},"ProblemDetails та структурована обробка помилок","/csharp/aspnet/web-api/problemdetails-error-handling","01.csharp/11.aspnet/12.web-api/05.problemdetails-error-handling",{"title":1315,"path":1316,"stem":1317},"Фільтри у Web API контексті","/csharp/aspnet/web-api/filters-for-api","01.csharp/11.aspnet/12.web-api/06.filters-for-api",{"title":1319,"path":1320,"stem":1321},"Пагінація, фільтрація та сортування","/csharp/aspnet/web-api/pagination-filtering-sorting","01.csharp/11.aspnet/12.web-api/07.pagination-filtering-sorting",{"title":1323,"path":1324,"stem":1325},"HATEOAS та Resource Expansion","/csharp/aspnet/web-api/hateoas-resource-expansion","01.csharp/11.aspnet/12.web-api/08.hateoas-resource-expansion",{"title":1327,"path":1328,"stem":1329},"Гібридна архітектура - Minimal API + Controllers","/csharp/aspnet/web-api/minimal-api-vs-controllers-hybrid","01.csharp/11.aspnet/12.web-api/09.minimal-api-vs-controllers-hybrid",{"title":1331,"path":1332,"stem":1333},"Документація API - Swashbuckle, NSwag та генерація клієнтів","/csharp/aspnet/web-api/api-documentation-generation","01.csharp/11.aspnet/12.web-api/10.api-documentation-generation",{"title":1335,"path":1336,"stem":1337},"Health Checks та моніторинг API","/csharp/aspnet/web-api/health-checks-monitoring","01.csharp/11.aspnet/12.web-api/11.health-checks-monitoring",{"title":1339,"path":1340,"stem":1341},"Підсумковий проєкт - Production-Ready REST API","/csharp/aspnet/web-api/web-api-project","01.csharp/11.aspnet/12.web-api/12.web-api-project",{"title":1343,"path":1344,"stem":1345},"План курсу: ASP.NET Core Web API (Controllers)","/csharp/aspnet/web-api/plan","01.csharp/11.aspnet/12.web-api/plan",{"title":1347,"icon":1348,"path":1349,"stem":1350,"children":1351,"page":59},"Desktop UI","i-lucide-app-window","/csharp/desktop-ui","01.csharp/12.desktop-ui",[1352,1356,1360,1364,1368,1372,1376,1380,1384,1388,1392,1396,1400,1404,1408,1412,1416,1420,1424,1428,1432,1436,1440,1444,1448,1452,1456,1460,1464,1468,1472,1476,1480,1484,1488,1492,1496,1500,1504,1508,1512,1516,1520,1524,1528,1532,1536,1540,1544,1548,1552,1556,1560,1564,1568,1572,1576,1580,1584,1588,1592,1596,1600,1604,1608,1612,1616,1620,1624,1628,1632],{"title":1353,"path":1354,"stem":1355},"Що таке десктопна розробка?","/csharp/desktop-ui/what-is-desktop-dev","01.csharp/12.desktop-ui/01.what-is-desktop-dev",{"title":1357,"path":1358,"stem":1359},"Архітектура WPF — як влаштований графічний інтерфейс","/csharp/desktop-ui/wpf-architecture","01.csharp/12.desktop-ui/02.wpf-architecture",{"title":1361,"path":1362,"stem":1363},"Перший WPF-проєкт — від нуля до вікна","/csharp/desktop-ui/first-wpf-app","01.csharp/12.desktop-ui/03.first-wpf-app",{"title":1365,"path":1366,"stem":1367},"Перший Avalonia-проєкт: WPF для всіх платформ","/csharp/desktop-ui/03a.first-avalonia-app","01.csharp/12.desktop-ui/03a.first-avalonia-app",{"title":1369,"path":1370,"stem":1371},"XAML: декларативний інтерфейс","/csharp/desktop-ui/xaml-basics","01.csharp/12.desktop-ui/04.xaml-basics",{"title":1373,"path":1374,"stem":1375},"Fluent UI у WPF — сучасний дизайн Windows 11","/csharp/desktop-ui/04a.wpf-fluent-ui","01.csharp/12.desktop-ui/04a.wpf-fluent-ui",{"title":1377,"path":1378,"stem":1379},"WPF UI — сучасна бібліотека Fluent контролів","/csharp/desktop-ui/04b.wpf-ui-library","01.csharp/12.desktop-ui/04b.wpf-ui-library",{"title":1381,"path":1382,"stem":1383},"HandyControl — велика бібліотека UI контролів для WPF","/csharp/desktop-ui/04c.handycontrol-library","01.csharp/12.desktop-ui/04c.handycontrol-library",{"title":1385,"path":1386,"stem":1387},"Простори імен та ресурси XAML","/csharp/desktop-ui/xaml-namespaces-resources","01.csharp/12.desktop-ui/05.xaml-namespaces-resources",{"title":1389,"path":1390,"stem":1391},"XAML в Avalonia: ключові відмінності від WPF","/csharp/desktop-ui/05a.avalonia-xaml-differences","01.csharp/12.desktop-ui/05a.avalonia-xaml-differences",{"title":1393,"path":1394,"stem":1395},"Розширення розмітки XAML (Markup Extensions)","/csharp/desktop-ui/xaml-markup-extensions","01.csharp/12.desktop-ui/06.xaml-markup-extensions",{"title":1397,"path":1398,"stem":1399},"Панелі Layout: StackPanel, WrapPanel, DockPanel","/csharp/desktop-ui/layout-panels-part1","01.csharp/12.desktop-ui/07.layout-panels-part1",{"title":1401,"path":1402,"stem":1403},"Grid, Canvas, UniformGrid","/csharp/desktop-ui/layout-panels-part2","01.csharp/12.desktop-ui/07.layout-panels-part2",{"title":1405,"path":1406,"stem":1407},"Просунуті техніки Layout","/csharp/desktop-ui/layout-advanced","01.csharp/12.desktop-ui/08.layout-advanced",{"title":1409,"path":1410,"stem":1411},"Адаптивний Layout та найкращі практики","/csharp/desktop-ui/layout-responsive","01.csharp/12.desktop-ui/09.layout-responsive",{"title":1413,"path":1414,"stem":1415},"Layout в Avalonia: відмінності та нові можливості","/csharp/desktop-ui/09a.layout-avalonia","01.csharp/12.desktop-ui/09a.layout-avalonia",{"title":1417,"path":1418,"stem":1419},"Button, Image, ProgressBar та інші базові контроли","/csharp/desktop-ui/basic-controls","01.csharp/12.desktop-ui/10.basic-controls",{"title":1421,"path":1422,"stem":1423},"Контроли в Avalonia: відмінності від WPF","/csharp/desktop-ui/10a.controls-avalonia","01.csharp/12.desktop-ui/10a.controls-avalonia",{"title":1425,"path":1426,"stem":1427},"Текстові контроли — TextBlock, TextBox, RichTextBox","/csharp/desktop-ui/text-controls","01.csharp/12.desktop-ui/11.text-controls",{"title":1429,"path":1430,"stem":1431},"Контроли вибору — CheckBox, RadioButton, ComboBox, ListBox, DatePicker","/csharp/desktop-ui/selection-controls","01.csharp/12.desktop-ui/12.selection-controls",{"title":1433,"path":1434,"stem":1435},"Content Model — GroupBox, Expander, TabControl, StatusBar","/csharp/desktop-ui/content-controls","01.csharp/12.desktop-ui/13.content-controls",{"title":1437,"path":1438,"stem":1439},"UI/UX принципи десктопних застосунків","/csharp/desktop-ui/13a.ui-ux-principles","01.csharp/12.desktop-ui/13a.ui-ux-principles",{"title":1441,"path":1442,"stem":1443},"Dependency Properties — Концепція та Value Resolution","/csharp/desktop-ui/dependency-properties-part1","01.csharp/12.desktop-ui/14.dependency-properties-part1",{"title":1445,"path":1446,"stem":1447},"Avalonia Property System — StyledProperty та DirectProperty","/csharp/desktop-ui/14a.avalonia-property-system","01.csharp/12.desktop-ui/14a.avalonia-property-system",{"title":1449,"path":1450,"stem":1451},"Attached Properties — Властивості без меж","/csharp/desktop-ui/attached-properties","01.csharp/12.desktop-ui/15.attached-properties",{"title":1453,"path":1454,"stem":1455},"Routed Events — Маршрутизація подій у WPF","/csharp/desktop-ui/routed-events","01.csharp/12.desktop-ui/16.routed-events",{"title":1457,"path":1458,"stem":1459},"Data Binding — Від Code-Behind до Декларативності","/csharp/desktop-ui/data-binding-basics-part1","01.csharp/12.desktop-ui/17.data-binding-basics-part1",{"title":1461,"path":1462,"stem":1463},"INotifyPropertyChanged — Живе оновлення UI","/csharp/desktop-ui/data-binding-basics-part2","01.csharp/12.desktop-ui/17.data-binding-basics-part2",{"title":1465,"path":1466,"stem":1467},"Compiled Bindings в Avalonia — Безпека на етапі компіляції","/csharp/desktop-ui/17a.avalonia-compiled-bindings","01.csharp/12.desktop-ui/17a.avalonia-compiled-bindings",{"title":1469,"path":1470,"stem":1471},"Просунутий Data Binding — ElementName, RelativeSource, MultiBinding","/csharp/desktop-ui/data-binding-advanced","01.csharp/12.desktop-ui/18.data-binding-advanced",{"title":1473,"path":1474,"stem":1475},"Value Converters — Перетворення типів даних у Data Binding","/csharp/desktop-ui/value-converters","01.csharp/12.desktop-ui/19.value-converters",{"title":1477,"path":1478,"stem":1479},"Data Templates — Візуалізація об'єктів у WPF","/csharp/desktop-ui/data-templates","01.csharp/12.desktop-ui/20.data-templates",{"title":1481,"path":1482,"stem":1483},"Collections Binding Part 1 — ObservableCollection та ItemsControl","/csharp/desktop-ui/collections-binding-part1","01.csharp/12.desktop-ui/21.collections-binding-part1",{"title":1485,"path":1486,"stem":1487},"Collections Binding Part 2 — ICollectionView, Filtering, Sorting та Virtualization","/csharp/desktop-ui/collections-binding-part2","01.csharp/12.desktop-ui/21.collections-binding-part2",{"title":1489,"path":1490,"stem":1491},"MVVM Pattern — Від Spaghetti Code до архітектури","/csharp/desktop-ui/mvvm-pattern","01.csharp/12.desktop-ui/22.mvvm-pattern",{"title":1493,"path":1494,"stem":1495},"ViewModel Implementation — Від BaseViewModel до валідації","/csharp/desktop-ui/viewmodel-implementation","01.csharp/12.desktop-ui/23.viewmodel-implementation",{"title":1497,"path":1498,"stem":1499},"Commands — Від event handlers до декларативних команд","/csharp/desktop-ui/commands","01.csharp/12.desktop-ui/24.commands",{"title":1501,"path":1502,"stem":1503},"MVVM Toolkit — MVVM без boilerplate через Source Generators","/csharp/desktop-ui/mvvm-toolkit","01.csharp/12.desktop-ui/25.mvvm-toolkit",{"title":1505,"path":1506,"stem":1507},"Messenger Pattern — Комунікація між ViewModel без прямих посилань","/csharp/desktop-ui/messenger-pattern","01.csharp/12.desktop-ui/26.messenger-pattern",{"title":1509,"path":1510,"stem":1511},"Стилі WPF — CSS для десктопу","/csharp/desktop-ui/styles-basics","01.csharp/12.desktop-ui/27.styles-basics",{"title":1513,"path":1514,"stem":1515},"CSS-like стилі Avalonia","/csharp/desktop-ui/27a.avalonia-css-styling","01.csharp/12.desktop-ui/27a.avalonia-css-styling",{"title":1517,"path":1518,"stem":1519},"Control Templates — Частина 1. Концепція та TemplateBinding","/csharp/desktop-ui/control-templates-part1","01.csharp/12.desktop-ui/28.control-templates-part1",{"title":1521,"path":1522,"stem":1523},"Control Templates — Частина 2. Named Parts та ContentPresenter","/csharp/desktop-ui/control-templates-part2","01.csharp/12.desktop-ui/28.control-templates-part2",{"title":1525,"path":1526,"stem":1527},"Control Themes в Avalonia — нова ера стилізації","/csharp/desktop-ui/28a.avalonia-control-themes","01.csharp/12.desktop-ui/28a.avalonia-control-themes",{"title":1529,"path":1530,"stem":1531},"Triggers та Visual State Manager у WPF","/csharp/desktop-ui/triggers-visual-states","01.csharp/12.desktop-ui/29.triggers-visual-states",{"title":1533,"path":1534,"stem":1535},"Pseudo-classes в Avalonia — замість WPF Triggers","/csharp/desktop-ui/29a.avalonia-pseudo-classes","01.csharp/12.desktop-ui/29a.avalonia-pseudo-classes",{"title":1537,"path":1538,"stem":1539},"Теми та ресурсні словники у WPF","/csharp/desktop-ui/resources-themes","01.csharp/12.desktop-ui/30.resources-themes",{"title":1541,"path":1542,"stem":1543},"Avalonia Themes — Fluent Design та система тематизації","/csharp/desktop-ui/30a.avalonia-themes-fluent","01.csharp/12.desktop-ui/30a.avalonia-themes-fluent",{"title":1545,"path":1546,"stem":1547},"Контроли колекцій — глибоке занурення","/csharp/desktop-ui/collection-controls","01.csharp/12.desktop-ui/31.collection-controls",{"title":1549,"path":1550,"stem":1551},"DataGrid — колонки та базове відображення","/csharp/desktop-ui/datagrid-part1","01.csharp/12.desktop-ui/32.datagrid-part1",{"title":1553,"path":1554,"stem":1555},"DataGrid — сортування, фільтрація, редагування","/csharp/desktop-ui/datagrid-part2","01.csharp/12.desktop-ui/32.datagrid-part2",{"title":1557,"path":1558,"stem":1559},"TreeView та GridView","/csharp/desktop-ui/treeview-listview","01.csharp/12.desktop-ui/33.treeview-listview",{"title":1561,"path":1562,"stem":1563},"Меню, Toolbar, ContextMenu, StatusBar","/csharp/desktop-ui/menus-toolbars","01.csharp/12.desktop-ui/34.menus-toolbars",{"title":1565,"path":1566,"stem":1567},"Навігація та керування вікнами. Частина 1: вікна та сторінки","/csharp/desktop-ui/navigation-windows-part1","01.csharp/12.desktop-ui/35.navigation-windows-part1",{"title":1569,"path":1570,"stem":1571},"Навігація та керування вікнами. Частина 2: MVVM-навігація","/csharp/desktop-ui/navigation-windows-part2","01.csharp/12.desktop-ui/35.navigation-windows-part2",{"title":1573,"path":1574,"stem":1575},"Avalonia — Навігація та діалоги","/csharp/desktop-ui/35a.avalonia-navigation-dialogs","01.csharp/12.desktop-ui/35a.avalonia-navigation-dialogs",{"title":1577,"path":1578,"stem":1579},"Діалоги та File Pickers у WPF","/csharp/desktop-ui/dialogs-file-pickers","01.csharp/12.desktop-ui/36.dialogs-file-pickers",{"title":1581,"path":1582,"stem":1583},"UserControl: компонентний підхід у WPF","/csharp/desktop-ui/user-controls","01.csharp/12.desktop-ui/37.user-controls",{"title":1585,"path":1586,"stem":1587},"Custom Controls: Lookless Controls у WPF","/csharp/desktop-ui/custom-controls","01.csharp/12.desktop-ui/38.custom-controls",{"title":1589,"path":1590,"stem":1591},"Avalonia TemplatedControl — Lookless Controls","/csharp/desktop-ui/38a.avalonia-templated-controls","01.csharp/12.desktop-ui/38a.avalonia-templated-controls",{"title":1593,"path":1594,"stem":1595},"Анімації у WPF: Storyboard та Easing Functions","/csharp/desktop-ui/animations-transitions","01.csharp/12.desktop-ui/39.animations-transitions",{"title":1597,"path":1598,"stem":1599},"Анімації в Avalonia","/csharp/desktop-ui/39a.avalonia-animations","01.csharp/12.desktop-ui/39a.avalonia-animations",{"title":1601,"path":1602,"stem":1603},"2D Графіка та Мультимедіа у WPF","/csharp/desktop-ui/media-graphics","01.csharp/12.desktop-ui/40.media-graphics",{"title":1605,"path":1606,"stem":1607},"Dependency Injection у WPF та Avalonia","/csharp/desktop-ui/di-integration","01.csharp/12.desktop-ui/41.di-integration",{"title":1609,"path":1610,"stem":1611},"SQLite та EF Core у десктопних додатках","/csharp/desktop-ui/data-persistence-part1","01.csharp/12.desktop-ui/42.data-persistence-part1",{"title":1613,"path":1614,"stem":1615},"Repository Pattern та Unit of Work","/csharp/desktop-ui/data-persistence-part2","01.csharp/12.desktop-ui/43.data-persistence-part2",{"title":1617,"path":1618,"stem":1619},"Тестування ViewModels","/csharp/desktop-ui/viewmodel-testing","01.csharp/12.desktop-ui/44.viewmodel-testing",{"title":1621,"path":1622,"stem":1623},"Avalonia Headless Testing — тестування UI без вікон","/csharp/desktop-ui/44a.avalonia-headless-testing","01.csharp/12.desktop-ui/44a.avalonia-headless-testing",{"title":1625,"path":1626,"stem":1627},"Кросплатформна розробка з Avalonia","/csharp/desktop-ui/avalonia-cross-platform","01.csharp/12.desktop-ui/45.avalonia-cross-platform",{"title":1629,"path":1630,"stem":1631},"Пакування та розгортання Avalonia додатків","/csharp/desktop-ui/avalonia-packaging-deployment","01.csharp/12.desktop-ui/46.avalonia-packaging-deployment",{"title":1633,"path":1634,"stem":1635},"Розгортання WPF застосунків","/csharp/desktop-ui/wpf-packaging-deployment","01.csharp/12.desktop-ui/47.wpf-packaging-deployment",{"title":1637,"path":1638,"stem":1639},"C# & .NET: The Ultimate Roadmap","/csharp/roadmap","01.csharp/roadmap",{"title":1641,"icon":1642,"path":1643,"stem":1644,"children":1645,"page":59},"C++","i-devicon-cplusplus","/cpp","02.cpp",[1646,1650,1654,1658,1662,1666,1670,1674,1678,1681,1685,1689,1693,1697,1701,1705,1709,1713,1717,1721,1725,1729,1733,1737,1741,1745,1749,1753,1757,1761],{"title":1647,"path":1648,"stem":1649},"Вступ у програмування та алгоритми","/cpp/intro-algorithms","02.cpp/01.intro-algorithms",{"title":1651,"path":1652,"stem":1653},"Code Style: угоди про оформлення коду","/cpp/code-style","02.cpp/02.code-style",{"title":1655,"path":1656,"stem":1657},"Середовище розробки та перший 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типу void","/cpp/void-pointers","02.cpp/20.void-pointers",{"title":1726,"path":1727,"stem":1728},"Вказівники на вказівники","/cpp/pointers-to-pointers","02.cpp/21.pointers-to-pointers",{"title":1730,"path":1731,"stem":1732},"Оператор доступу до членів через вказівник (->)","/cpp/member-access-operator","02.cpp/22.member-access-operator",{"title":1734,"path":1735,"stem":1736},"Цикл for-each (Range-based for)","/cpp/foreach-loop","02.cpp/23.foreach-loop",{"title":1738,"path":1739,"stem":1740},"Вказівники на функції","/cpp/function-pointers","02.cpp/24.function-pointers",{"title":1742,"path":1743,"stem":1744},"Лямбда-вирази","/cpp/lambdas","02.cpp/25.lambdas",{"title":1746,"path":1747,"stem":1748},"Лямбда-захоплення","/cpp/lambda-captures","02.cpp/26.lambda-captures",{"title":1750,"path":1751,"stem":1752},"Еліпсис","/cpp/ellipsis","02.cpp/27.ellipsis",{"title":1754,"path":1755,"stem":1756},"Аргументи командного рядка","/cpp/command-line-arguments","02.cpp/28.command-line-arguments",{"title":1758,"path":1759,"stem":1760},"Перерахування (enum)","/cpp/enum","02.cpp/29.enum",{"title":1762,"path":1763,"stem":1764},"План навчання: Курс C++ — Продовження (Статті 29–60+)","/cpp/curriculum-plan","02.cpp/curriculum-plan",{"title":1766,"icon":1767,"path":1768,"stem":1769,"children":1770,"page":59},"JavaScript","i-devicon-javascript","/javascript","03.javascript",[1771,1797,1851,1873,2177,2215],{"title":1772,"icon":1773,"path":1774,"stem":1775,"children":1776,"page":59},"Events","i-lucide-mouse-pointer-click","/javascript/events","03.javascript/01.events",[1777,1781,1785,1789,1793],{"title":1778,"path":1779,"stem":1780},"Вступ до подій браузера","/javascript/events/intro","03.javascript/01.events/01.intro",{"title":1782,"path":1783,"stem":1784},"Бульбашковий механізм (Bubbling) та занурення (Capturing)","/javascript/events/bubbling-capturing","03.javascript/01.events/02.bubbling-capturing",{"title":1786,"path":1787,"stem":1788},"Делегування подій (Event Delegation)","/javascript/events/delegate-events","03.javascript/01.events/03.delegate-events",{"title":1790,"path":1791,"stem":1792},"Типові дії браузера та preventDefault()","/javascript/events/prevent-default","03.javascript/01.events/04.prevent-default",{"title":1794,"path":1795,"stem":1796},"Запуск користувацьких подій (Custom Events)","/javascript/events/custom-events","03.javascript/01.events/05.custom-events",{"title":1798,"icon":1799,"path":1800,"stem":1801,"children":1802,"page":59},"Network","i-lucide-globe","/javascript/network","03.javascript/02.network",[1803,1807,1811,1815,1819,1823,1827,1831,1835,1839,1843,1847],{"title":1804,"path":1805,"stem":1806},"Fetch API - Сучасний підхід до HTTP-запитів","/javascript/network/01-fetch-api","03.javascript/02.network/01-fetch-api",{"title":1808,"path":1809,"stem":1810},"FormData - Робота з формами та файлами","/javascript/network/02-formdata","03.javascript/02.network/02-formdata",{"title":1812,"path":1813,"stem":1814},"Відстеження прогресу завантаження","/javascript/network/03-download-progress","03.javascript/02.network/03-download-progress",{"title":1816,"path":1817,"stem":1818},"Переривання fetch-запитів","/javascript/network/04-abort-requests","03.javascript/02.network/04-abort-requests",{"title":1820,"path":1821,"stem":1822},"CORS - Запити між різними джерелами","/javascript/network/05-cors","03.javascript/02.network/05-cors",{"title":1824,"path":1825,"stem":1826},"Fetch API - Повний довідник опцій","/javascript/network/06-fetch-options","03.javascript/02.network/06-fetch-options",{"title":1828,"path":1829,"stem":1830},"URL Objects - Робота з посиланнями","/javascript/network/07-url-objects","03.javascript/02.network/07-url-objects",{"title":1832,"path":1833,"stem":1834},"XMLHttpRequest - AJAX та низькорівневі запити","/javascript/network/08-xmlhttprequest","03.javascript/02.network/08-xmlhttprequest",{"title":1836,"path":1837,"stem":1838},"Відновлюване завантаження файлів","/javascript/network/09-resumable-upload","03.javascript/02.network/09-resumable-upload",{"title":1840,"path":1841,"stem":1842},"Cookies, document.cookie та світ після \"Cookiepocalypse\"","/javascript/network/10-cookies","03.javascript/02.network/10-cookies",{"title":1844,"path":1845,"stem":1846},"js-cookie: Керування Cookies без Болю","/javascript/network/11-js-cookie","03.javascript/02.network/11-js-cookie",{"title":1848,"path":1849,"stem":1850},"Axios: Потужний HTTP-клієнт для JavaScript","/javascript/network/12-axios","03.javascript/02.network/12-axios",{"title":1852,"icon":1853,"path":1854,"stem":1855,"children":1856,"page":59},"Bom","i-lucide-monitor","/javascript/bom","03.javascript/03.bom",[1857,1861,1865,1869],{"title":1858,"path":1859,"stem":1860},"LocalStorage, SessionStorage та patterns збереження даних","/javascript/bom/01-localstorage","03.javascript/03.bom/01-localstorage",{"title":1862,"path":1863,"stem":1864},"Location Object - Керування адресою сторінки","/javascript/bom/02-location-object","03.javascript/03.bom/02-location-object",{"title":1866,"path":1867,"stem":1868},"History API - Керування історією браузера","/javascript/bom/03-history-api","03.javascript/03.bom/03-history-api",{"title":1870,"path":1871,"stem":1872},"Navigator Object - Ідентифікація та Можливості Пристрою","/javascript/bom/04-navigator-object","03.javascript/03.bom/04-navigator-object",{"title":1874,"icon":1875,"path":1876,"stem":1877,"children":1878},"React","i-devicon-react","/javascript/react","03.javascript/04.react/index",[1879,1880,1884,1888,1892,1896,1959,1994,2146],{"title":1874,"path":1876,"stem":1877},{"title":1881,"path":1882,"stem":1883},"Робота з Формами в React","/javascript/react/react-forms","03.javascript/04.react/01.react-forms",{"title":1885,"path":1886,"stem":1887},"React Hook Form: Професійна Робота з Формами","/javascript/react/react-hook-form","03.javascript/04.react/02.react-hook-form",{"title":1889,"path":1890,"stem":1891},"React Hook Form: Глибоке Розуміння Архітектури та Оптимізації","/javascript/react/react-hook-form-new","03.javascript/04.react/02.react-hook-form-new",{"title":1893,"path":1894,"stem":1895},"Axios та React: Професійна Архітектура Запитів","/javascript/react/data-fetching-axios","03.javascript/04.react/03.data-fetching-axios",{"title":1897,"icon":132,"path":1898,"stem":1899,"children":1900},"Tanstack Query","/javascript/react/tanstack-query","03.javascript/04.react/04.tanstack-query/index",[1901,1903,1907,1911,1915,1919,1923,1927,1931,1935,1939,1943,1947,1951,1955],{"title":1902,"path":1898,"stem":1899},"TanStack Query: Майстерність Керування Станом Сервера",{"title":1904,"path":1905,"stem":1906},"Парадигма Server State: Чому useEffect недостатньо","/javascript/react/tanstack-query/server-state-paradigm","03.javascript/04.react/04.tanstack-query/01.server-state-paradigm",{"title":1908,"path":1909,"stem":1910},"Встановлення та Налаштування: Фундамент","/javascript/react/tanstack-query/installation-and-devtools","03.javascript/04.react/04.tanstack-query/02.installation-and-devtools",{"title":1912,"path":1913,"stem":1914},"Основи Запитів та Магія Ключів","/javascript/react/tanstack-query/query-basics-and-keys","03.javascript/04.react/04.tanstack-query/03.query-basics-and-keys",{"title":1916,"path":1917,"stem":1918},"Синхронізація Даних: Життєвий Цикл Запиту","/javascript/react/tanstack-query/data-synchronization","03.javascript/04.react/04.tanstack-query/04.data-synchronization",{"title":1920,"path":1921,"stem":1922},"Мутації та Інвалідація: Зміна Даних","/javascript/react/tanstack-query/mutations-and-invalidation","03.javascript/04.react/04.tanstack-query/05.mutations-and-invalidation",{"title":1924,"path":1925,"stem":1926},"Оптимістичні Оновлення: Швидше за Світло","/javascript/react/tanstack-query/optimistic-updates","03.javascript/04.react/04.tanstack-query/06.optimistic-updates",{"title":1928,"path":1929,"stem":1930},"Пагінація та Infinite Scroll","/javascript/react/tanstack-query/pagination-and-load-more","03.javascript/04.react/04.tanstack-query/07.pagination-and-load-more",{"title":1932,"path":1933,"stem":1934},"Просунуті Патерни та Оптимізація","/javascript/react/tanstack-query/advanced-patterns","03.javascript/04.react/04.tanstack-query/08.advanced-patterns",{"title":1936,"path":1937,"stem":1938},"Архітектура та Best Practices","/javascript/react/tanstack-query/architecture-and-best-practices","03.javascript/04.react/04.tanstack-query/09.architecture-and-best-practices",{"title":1940,"path":1941,"stem":1942},"Server-Side Rendering (SSR) та Гідратація","/javascript/react/tanstack-query/server-side-rendering","03.javascript/04.react/04.tanstack-query/10.server-side-rendering",{"title":1944,"path":1945,"stem":1946},"Стратегії Тестування","/javascript/react/tanstack-query/testing-strategies","03.javascript/04.react/04.tanstack-query/11.testing-strategies",{"title":1948,"path":1949,"stem":1950},"Аутентифікація та Обробка Помилок","/javascript/react/tanstack-query/authentication-and-errors","03.javascript/04.react/04.tanstack-query/12.authentication-and-errors",{"title":1952,"path":1953,"stem":1954},"React Suspense та Майбутнє","/javascript/react/tanstack-query/react-suspense","03.javascript/04.react/04.tanstack-query/13.react-suspense",{"title":1956,"path":1957,"stem":1958},"Глибоке Занурення в Продуктивність","/javascript/react/tanstack-query/performance-deep-dive","03.javascript/04.react/04.tanstack-query/14.performance-deep-dive",{"title":1960,"icon":1875,"path":1961,"stem":1962,"children":1963},"React Router","/javascript/react/react-router","03.javascript/04.react/05.react-router/index",[1964,1966,1970,1974,1978,1982,1986,1990],{"title":1965,"path":1961,"stem":1962},"React Router: Навігаційна система сучасного вебу",{"title":1967,"path":1968,"stem":1969},"Налаштування та Базовий Роутинг","/javascript/react/react-router/setup-and-basic-routing","03.javascript/04.react/05.react-router/01.setup-and-basic-routing",{"title":1971,"path":1972,"stem":1973},"Динамічна Навігація","/javascript/react/react-router/navigation-and-links","03.javascript/04.react/05.react-router/02.navigation-and-links",{"title":1975,"path":1976,"stem":1977},"Вкладені Маршрути та Макети","/javascript/react/react-router/nested-routes-and-layouts","03.javascript/04.react/05.react-router/03.nested-routes-and-layouts",{"title":1979,"path":1980,"stem":1981},"Динамічні Маршрути та Параметри","/javascript/react/react-router/dynamic-routing","03.javascript/04.react/05.react-router/04.dynamic-routing",{"title":1983,"path":1984,"stem":1985},"Data APIs: Loaders та Actions","/javascript/react/react-router/data-loading","03.javascript/04.react/05.react-router/05.data-loading",{"title":1987,"path":1988,"stem":1989},"Просунуті Патерни","/javascript/react/react-router/advanced-patterns","03.javascript/04.react/05.react-router/06.advanced-patterns",{"title":1991,"path":1992,"stem":1993},"Legacy Routing: Компонентний підхід","/javascript/react/react-router/legacy-routing","03.javascript/04.react/05.react-router/07.legacy-routing",{"title":1995,"icon":132,"path":1996,"stem":1997,"children":1998},"Redux","/javascript/react/redux","03.javascript/04.react/06.redux/index",[1999,2001,2017,2046,2055,2076,2092,2121],{"title":2000,"path":1996,"stem":1997},"Redux: Еволюція управління станом",{"title":14,"icon":15,"path":2002,"stem":2003,"children":2004,"page":59},"/javascript/react/redux/fundamentals","03.javascript/04.react/06.redux/01.fundamentals",[2005,2009,2013],{"title":2006,"path":2007,"stem":2008},"Вступ до State Management","/javascript/react/redux/fundamentals/intro-state-management","03.javascript/04.react/06.redux/01.fundamentals/01.intro-state-management",{"title":2010,"path":2011,"stem":2012},"Філософія Redux та Три Принципи","/javascript/react/redux/fundamentals/redux-philosophy","03.javascript/04.react/06.redux/01.fundamentals/02.redux-philosophy",{"title":2014,"path":2015,"stem":2016},"Чисті функції та Іммутабельність","/javascript/react/redux/fundamentals/pure-functions-immutability","03.javascript/04.react/06.redux/01.fundamentals/03.pure-functions-immutability",{"title":2018,"icon":132,"path":2019,"stem":2020,"children":2021,"page":59},"Classic Redux","/javascript/react/redux/classic-redux","03.javascript/04.react/06.redux/02.classic-redux",[2022,2026,2030,2034,2038,2042],{"title":2023,"path":2024,"stem":2025},"Створення Store (Classic Redux)","/javascript/react/redux/classic-redux/store-setup","03.javascript/04.react/06.redux/02.classic-redux/01.store-setup",{"title":2027,"path":2028,"stem":2029},"Actions, Constants та Action Creators","/javascript/react/redux/classic-redux/actions-constants","03.javascript/04.react/06.redux/02.classic-redux/02.actions-constants",{"title":2031,"path":2032,"stem":2033},"Логіка Reducers","/javascript/react/redux/classic-redux/reducers","03.javascript/04.react/06.redux/02.classic-redux/03.reducers",{"title":2035,"path":2036,"stem":2037},"Комбінування Reducers (Root Reducer)","/javascript/react/redux/classic-redux/data-flow","03.javascript/04.react/06.redux/02.classic-redux/04.data-flow",{"title":2039,"path":2040,"stem":2041},"Підключення до React (React-Redux)","/javascript/react/redux/classic-redux/react-redux-connection","03.javascript/04.react/06.redux/02.classic-redux/05.react-redux-connection",{"title":2043,"path":2044,"stem":2045},"Middleware та Асинхронність (Redux Thunk)","/javascript/react/redux/classic-redux/middleware-thunk","03.javascript/04.react/06.redux/02.classic-redux/06.middleware-thunk",{"title":2047,"icon":132,"path":2048,"stem":2049,"children":2050,"page":59},"Transition To Rtk","/javascript/react/redux/transition-to-rtk","03.javascript/04.react/06.redux/03.transition-to-rtk",[2051],{"title":2052,"path":2053,"stem":2054},"Проблеми класичного Redux","/javascript/react/redux/transition-to-rtk/problems-with-classic","03.javascript/04.react/06.redux/03.transition-to-rtk/01.problems-with-classic",{"title":2056,"icon":132,"path":2057,"stem":2058,"children":2059,"page":59},"Redux Toolkit","/javascript/react/redux/redux-toolkit","03.javascript/04.react/06.redux/04.redux-toolkit",[2060,2064,2068,2072],{"title":2061,"path":2062,"stem":2063},"Налаштування Store з 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дружити","/java/pr2/impedance-mismatch","04.java/pr2/09.impedance-mismatch",{"title":2285,"path":2286,"stem":2287},"JDBC: Перший контакт із базою даних","/java/pr2/jdbc-fundamentals","04.java/pr2/10.jdbc-fundamentals",{"title":2289,"path":2290,"stem":2291},"Якість коду: Spotless, SpotBugs та SonarQube","/java/pr2/10a.code-quality","04.java/pr2/10a.code-quality",{"title":2293,"path":2294,"stem":2295},"Connection Pool: Патерн Object Pool для JDBC-з'єднань","/java/pr2/connection-pool","04.java/pr2/11.connection-pool",{"title":2297,"path":2298,"stem":2299},"Row Data Gateway: Об'єкт як обгортка рядка таблиці","/java/pr2/row-data-gateway","04.java/pr2/12.row-data-gateway",{"title":2301,"path":2302,"stem":2303},"Table Data Gateway: Фасад таблиці як архітектурний відступ","/java/pr2/table-data-gateway","04.java/pr2/13.table-data-gateway",{"title":2305,"path":2306,"stem":2307},"Repository + Data Mapper: Правильна шарова архітектура з JDBC","/java/pr2/repository-data-mapper","04.java/pr2/14.repository-data-mapper",{"title":2309,"path":2310,"stem":2311},"Identity Map: Кешування сутностей у рамках сесії","/java/pr2/identity-map","04.java/pr2/15.identity-map",{"title":2313,"path":2314,"stem":2315},"Unit of Work: Відстеження змін і координація JDBC-транзакцій","/java/pr2/unit-of-work","04.java/pr2/16.unit-of-work",{"title":2317,"path":2318,"stem":2319},"Strategy: Замінювані SQL-стратегії для підтримки різних СУБД","/java/pr2/strategy-sql","04.java/pr2/17.strategy-sql",{"title":2321,"path":2322,"stem":2323},"Proxy: Lazy Loading для One-To-Many колекцій","/java/pr2/proxy-lazy-loading","04.java/pr2/18.proxy-lazy-loading",{"title":2325,"path":2326,"stem":2327},"Generic Repository через Java Reflection: анотації та динамічний SQL","/java/pr2/generic-repository-reflection","04.java/pr2/19.generic-repository-reflection",{"title":2329,"path":2330,"stem":2331},"Specification Pattern: Композиція бізнес-правил для складних 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БД","/databases/intro/logical-schema","06.databases/01.intro/04.logical-schema",{"title":2381,"path":2382,"stem":2383},"Класифікація таблиць","/databases/intro/table-classification","06.databases/01.intro/05.table-classification",{"title":2385,"path":2386,"stem":2387},"PlantUML для баз даних","/databases/intro/plantuml-diagrams","06.databases/01.intro/06.plantuml-diagrams",{"title":2389,"icon":2354,"path":2390,"stem":2391,"children":2392,"page":59},"MS SQL Server Start","/databases/ms-sql-server-start","06.databases/02.ms-sql-server-start",[2393,2397,2403,2407],{"title":2394,"path":2395,"stem":2396},"Типи даних у MS SQL Server","/databases/ms-sql-server-start/data-types","06.databases/02.ms-sql-server-start/01.data-types",{"title":2398,"path":2399,"stem":2400,"children":2401},"Індекси у MS SQL 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TABLE)","/databases/sql/ddl-create-table","06.databases/03.sql/01.ddl-create-table",{"title":2425,"path":2426,"stem":2427},"DDL - Зміна та видалення таблиць (ALTER, DROP)","/databases/sql/ddl-alter-drop-table","06.databases/03.sql/02.ddl-alter-drop-table",{"title":2429,"path":2430,"stem":2431},"SELECT запити - Основи","/databases/sql/select-queries-fundamentals","06.databases/03.sql/03.select-queries-fundamentals",{"title":2433,"path":2434,"stem":2435},"SELECT запити - Розширені можливості","/databases/sql/select-queries-advanced","06.databases/03.sql/04.select-queries-advanced",{"title":2437,"path":2438,"stem":2439},"INSERT запити - Додавання даних","/databases/sql/insert-queries","06.databases/03.sql/05.insert-queries",{"title":2441,"path":2442,"stem":2443},"UPDATE та DELETE запити","/databases/sql/update-delete-queries","06.databases/03.sql/06.update-delete-queries",{"title":2445,"path":2446,"stem":2447},"Транзакції в SQL","/databases/sql/transactions","06.databases/03.sql/07.transactions",{"title":2449,"icon":2354,"path":2450,"stem":2451,"children":2452,"page":59},"Multi Table Databases","/databases/multi-table-databases","06.databases/04.multi-table-databases",[2453,2457,2461,2465,2469,2473],{"title":2454,"path":2455,"stem":2456},"Зв'язки та нормалізація БД","/databases/multi-table-databases/relationships-and-normalization","06.databases/04.multi-table-databases/00.relationships-and-normalization",{"title":2458,"path":2459,"stem":2460},"INNER JOIN - З'єднання таблиць","/databases/multi-table-databases/inner-join","06.databases/04.multi-table-databases/01.inner-join",{"title":2462,"path":2463,"stem":2464},"OUTER JOINs - LEFT, RIGHT, FULL","/databases/multi-table-databases/outer-joins","06.databases/04.multi-table-databases/02.outer-joins",{"title":2466,"path":2467,"stem":2468},"CROSS та SELF JOINs","/databases/multi-table-databases/cross-self-joins","06.databases/04.multi-table-databases/03.cross-self-joins",{"title":2470,"path":2471,"stem":2472},"Підзапити (Subqueries)","/databases/multi-table-databases/subqueries","06.databases/04.multi-table-databases/04.subqueries",{"title":2474,"path":2475,"stem":2476},"Агрегації з JOIN","/databases/multi-table-databases/aggregations-with-joins","06.databases/04.multi-table-databases/05.aggregations-with-joins",{"title":2478,"icon":2479,"path":2480,"stem":2481,"children":2482,"page":59},"Aggregate Functions","i-lucide-calculator","/databases/aggregate-functions","06.databases/05.aggregate-functions",[2483,2487,2491],{"title":2484,"path":2485,"stem":2486},"Функції агрегування в MS SQL Server","/databases/aggregate-functions/introduction-aggregate-functions","06.databases/05.aggregate-functions/01.introduction-aggregate-functions",{"title":2488,"path":2489,"stem":2490},"Групування даних в MS SQL Server","/databases/aggregate-functions/grouping-data","06.databases/05.aggregate-functions/02.grouping-data",{"title":2492,"path":2493,"stem":2494},"Підзапити з агрегатними функціями","/databases/aggregate-functions/subqueries-aggregates","06.databases/05.aggregate-functions/03.subqueries-aggregates",{"title":2496,"icon":2497,"path":2498,"stem":2499,"children":2500,"page":59},"Тригери та зберігаємі процедури","i-lucide-database-zap","/databases/triggers-stored-procedures","06.databases/07.triggers-stored-procedures",[2501,2505,2509,2513,2517,2521,2525],{"title":2502,"path":2503,"stem":2504},"DML-тригери","/databases/triggers-stored-procedures/dml-triggers","06.databases/07.triggers-stored-procedures/01.dml-triggers",{"title":2506,"path":2507,"stem":2508},"DDL-тригери","/databases/triggers-stored-procedures/ddl-triggers","06.databases/07.triggers-stored-procedures/02.ddl-triggers",{"title":2510,"path":2511,"stem":2512},"Transact-SQL 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Docker","/tools/docker/networking-basics","07.tools/01.docker/14.networking-basics",{"title":2630,"path":2631,"stem":2632},"Змінні оточення та конфігурація","/tools/docker/environment-and-configuration","07.tools/01.docker/15.environment-and-configuration",{"title":2634,"path":2635,"stem":2636},"Docker Compose — оркестрація контейнерів","/tools/docker/docker-compose-basics","07.tools/01.docker/16.docker-compose-basics",{"title":2638,"path":2639,"stem":2640},"Docker Compose — Multi-Service застосунки","/tools/docker/compose-multi-service","07.tools/01.docker/17.compose-multi-service",{"title":2642,"icon":2643,"path":2644,"stem":2645,"children":2646,"page":59},"Software Engineering","i-lucide-code-2","/software-engineering","09.software-engineering",[2647,2651,2655,2659,2663,2667,2671,2675,2679,2683,2687],{"title":2648,"path":2649,"stem":2650},"1. 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Шрифти та текст","/html-css/css-typography","12.html-css/11.css-typography",{"title":2837,"path":2838,"stem":2839},"Кольори та фони в CSS","/html-css/css-colors-backgrounds","12.html-css/12.css-colors-backgrounds",{"title":2841,"path":2842,"stem":2843},"Тіні та фільтри в CSS","/html-css/12b.css-shadows-filters","12.html-css/12b.css-shadows-filters",{"title":2845,"path":2846,"stem":2847},"CSS Flexbox: Фундамент гнучких макетів","/html-css/css-flexbox-fundamentals","12.html-css/13.css-flexbox-fundamentals",{"title":2849,"path":2850,"stem":2851},"CSS Flexbox: Вирівнювання та Позиціонування","/html-css/css-flexbox-alignment-sizing-and-patterns","12.html-css/14.css-flexbox-alignment-sizing-and-patterns",{"title":2853,"path":2854,"stem":2855},"CSS Grid. Двовимірний макет. Частина 1","/html-css/css-layout-grid","12.html-css/15.css-layout-grid",{"title":2857,"path":2858,"stem":2859},"CSS Grid. Двовимірний макет. Частина 2","/html-css/css-layout-grid-advanced","12.html-css/16.css-layout-grid-advanced",{"title":2861,"path":2862,"stem":2863},"Позиціонування в CSS. Z-index. Stacking Context","/html-css/css-positioning","12.html-css/17.css-positioning",{"title":2865,"path":2866,"stem":2867},"CSS Анімації та Переходи","/html-css/css-animations-transitions","12.html-css/18.css-animations-transitions",{"title":2869,"path":2870,"stem":2871},"Адаптивний дизайн. Media Queries. Частина 1","/html-css/css-responsive-media-queries","12.html-css/19.css-responsive-media-queries",{"title":2873,"path":2874,"stem":2875},"Адаптивний дизайн. Частина 2: clamp(), Container Queries, @layer","/html-css/css-responsive-advanced","12.html-css/20.css-responsive-advanced",{"title":2877,"path":2878,"stem":2879},"CSS Custom Properties. Методології. Сучасний CSS","/html-css/css-variables-methodologies","12.html-css/21.css-variables-methodologies",{"title":2881,"path":2882,"stem":2883},"Сучасний CSS 2023–2025: Нові можливості","/html-css/css-modern-features","12.html-css/22.css-modern-features",{"title":2885,"path":2886,"stem":2887},"CSS Nesting, @layer, @scope та @property: нативний препроцесор","/html-css/22a.css-nesting-modern-syntax","12.html-css/22a.css-nesting-modern-syntax",{"title":2889,"path":2890,"stem":2891},"CSS для форм та інтерактивних станів","/html-css/css-forms-interactive-states","12.html-css/23.css-forms-interactive-states",{"title":2893,"path":2894,"stem":2895},"Доступність у CSS (CSS Accessibility)","/html-css/css-accessibility","12.html-css/24.css-accessibility",{"title":2897,"path":2898,"stem":2899},"CSS-функції та сучасні sizing primitives","/html-css/css-functions-sizing","12.html-css/25.css-functions-sizing",{"title":2901,"path":2902,"stem":2903},"Rendering Pipeline і CSS Performance","/html-css/css-rendering-performance","12.html-css/26.css-rendering-performance",{"title":2905,"path":2906,"stem":2907},"CSS Best Practices: типові ситуації та правильні рішення","/html-css/css-best-practices","12.html-css/27.css-best-practices",{"title":2909,"path":2910,"stem":2911,"children":2912,"page":59},"Tailwind","/tailwind","21.tailwind",[2913,2917,2921,2925,2929,2933,2937,2941],{"title":2914,"path":2915,"stem":2916},"Що таке Tailwind CSS і навіщо він потрібен","/tailwind/tailwind-intro-philosophy","21.tailwind/01.tailwind-intro-philosophy",{"title":2918,"path":2919,"stem":2920},"Встановлення та налаштування Tailwind CSS v4","/tailwind/tailwind-installation-setup","21.tailwind/02.tailwind-installation-setup",{"title":2922,"path":2923,"stem":2924},"Utility-класи: основи та система Tailwind","/tailwind/tailwind-utility-classes-core","21.tailwind/03.tailwind-utility-classes-core",{"title":2926,"path":2927,"stem":2928},"Layout: Flexbox та Grid через Tailwind","/tailwind/tailwind-flexbox-grid","21.tailwind/04.tailwind-flexbox-grid",{"title":2930,"path":2931,"stem":2932},"Кастомізація теми через @theme у Tailwind v4","/tailwind/tailwind-theme-customization","21.tailwind/05.tailwind-theme-customization",{"title":2934,"path":2935,"stem":2936},"Варіанти: hover, focus, responsive, dark mode та нові v4","/tailwind/tailwind-variants-states","21.tailwind/06.tailwind-variants-states",{"title":2938,"path":2939,"stem":2940},"Типографіка та система кольорів у Tailwind v4","/tailwind/tailwind-typography-colors","21.tailwind/07.tailwind-typography-colors",{"title":2942,"path":2943,"stem":2944},"Компоненти та повторюваність: @apply, @utility та патерни","/tailwind/tailwind-components-patterns","21.tailwind/08.tailwind-components-patterns",{"title":2946,"path":2947,"stem":2948},"Showcase Компонентів kostyl.dev","/test-new-components","98.test-new-components",{"id":2950,"title":635,"body":2951,"description":9901,"extension":9902,"links":9903,"meta":9904,"navigation":3493,"path":636,"seo":9905,"stem":637,"__hash__":9906},"docs/01.csharp/10.ef-core/26.performance-fundamentals-part1.md",{"type":2952,"value":2953,"toc":9846},"minimark",[2954,2959,2964,2977,2980,2983,2990,2993,2997,3004,3009,3190,3309,3313,3316,3324,3339,3343,3357,3886,3890,4431,4433,4437,4440,4444,4447,4612,4615,4731,4735,4742,4745,4902,4904,4908,4912,4918,5008,5011,5015,5018,5160,5167,5245,5249,5259,5438,5442,5448,5588,5592,5671,5673,5677,5680,5684,5916,5920,6263,6267,6279,6448,6450,6454,6461,6468,6472,6600,6604,6610,6751,6755,6832,6834,6838,6849,7135,7139,7321,7323,7327,7330,7334,7512,7518,7522,7525,7841,7845,8732,8736,8817,8819,8823,8837,8843,9034,9038,9411,9421,9423,9427,9431,9623,9627,9707,9711,9740,9742,9746,9834,9842],[2955,2956,2958],"h1",{"id":2957},"продуктивність-ef-core-основи","Продуктивність EF Core: Основи",[2960,2961,2963],"h2",{"id":2962},"від-працює-до-працює-швидко","Від «працює» до «працює швидко»",[2965,2966,2967,2968,2972,2973,2976],"p",{},"Є два стани застосунку: той що ",[2969,2970,2971],"strong",{},"працює"," і той що ",[2969,2974,2975],{},"працює добре",". Перший стан досягається підключенням EF Core до бази і написанням LINQ-запитів. Другий — розумінням що відбувається «під капотом» і свідомим контролем над кожним SQL що генерується.",[2965,2978,2979],{},"EF Core — потужна абстракція над SQL. Як і кожна абстракція — вона «протікає» у певних сценаріях. Розробник бачить зручний LINQ. Database server виконує SQL що може відрізнятись від очікуваного у десятки разів за ефективністю.",[2965,2981,2982],{},"Найгірший сценарій: застосунок відмінно працює з 1000 записами на staging, але падає з timeout на production де 10 мільйонів записів. Це не баг EF Core — це незнання того, який SQL він генерує.",[2965,2984,2985,2986,2989],{},"Ключове правило продуктивності у EF Core: ",[2969,2987,2988],{},"ніколи не дозволяйте запитам виконуватись без розуміння що відбувається на рівні SQL",". SQL logging — не luxury, а обов'язковий інструмент розробки.",[2991,2992],"hr",{},[2960,2994,2996],{"id":2995},"logging-generated-sql-перший-крок-до-розуміння","Logging Generated SQL: перший крок до розуміння",[2965,2998,2999,3000,3003],{},"Перш ніж говорити про антипатерни — потрібно їх ",[2969,3001,3002],{},"бачити",". EF Core логує всі SQL запити, але за замовчуванням — у Debug рівень. Для активної розробки — підняти до Information або вивести у консоль.",[3005,3006,3008],"h3",{"id":3007},"налаштування-логування","Налаштування логування",[3010,3011,3016],"pre",{"className":3012,"code":3013,"language":3014,"meta":3015,"style":3015},"language-csharp shiki shiki-themes light-plus dark-plus dark-plus","// Program.cs: логувати EF Core SQL у консоль\nbuilder.Services.AddDbContext\u003CAppDbContext>(options =>\n{\n    options.UseSqlServer(connectionString)\n           .LogTo(\n               Console.WriteLine,            // де писати\n               LogLevel.Information,         // мінімальний рівень\n               DbContextLoggerOptions.DefaultWithLocalTime  // формат\n           )\n           .EnableSensitiveDataLogging()     // показувати значення параметрів\n           .EnableDetailedErrors();           // детальні повідомлення про помилки\n});\n","csharp","",[3017,3018,3019,3028,3064,3070,3090,3102,3119,3136,3150,3156,3170,3184],"code",{"__ignoreMap":3015},[3020,3021,3024],"span",{"class":3022,"line":3023},"line",1,[3020,3025,3027],{"class":3026},"spJ8K","// Program.cs: логувати EF Core SQL у консоль\n",[3020,3029,3031,3035,3039,3042,3044,3048,3051,3055,3058,3061],{"class":3022,"line":3030},2,[3020,3032,3034],{"class":3033},"siwwj","builder",[3020,3036,3038],{"class":3037},"sHH4Y",".",[3020,3040,3041],{"class":3033},"Services",[3020,3043,3038],{"class":3037},[3020,3045,3047],{"class":3046},"s8Opu","AddDbContext",[3020,3049,3050],{"class":3037},"\u003C",[3020,3052,3054],{"class":3053},"sN1BT","AppDbContext",[3020,3056,3057],{"class":3037},">(",[3020,3059,3060],{"class":3033},"options",[3020,3062,3063],{"class":3037}," =>\n",[3020,3065,3067],{"class":3022,"line":3066},3,[3020,3068,3069],{"class":3037},"{\n",[3020,3071,3073,3076,3078,3081,3084,3087],{"class":3022,"line":3072},4,[3020,3074,3075],{"class":3033},"    options",[3020,3077,3038],{"class":3037},[3020,3079,3080],{"class":3046},"UseSqlServer",[3020,3082,3083],{"class":3037},"(",[3020,3085,3086],{"class":3033},"connectionString",[3020,3088,3089],{"class":3037},")\n",[3020,3091,3093,3096,3099],{"class":3022,"line":3092},5,[3020,3094,3095],{"class":3037},"           .",[3020,3097,3098],{"class":3046},"LogTo",[3020,3100,3101],{"class":3037},"(\n",[3020,3103,3105,3108,3110,3113,3116],{"class":3022,"line":3104},6,[3020,3106,3107],{"class":3033},"               Console",[3020,3109,3038],{"class":3037},[3020,3111,3112],{"class":3033},"WriteLine",[3020,3114,3115],{"class":3037},",            ",[3020,3117,3118],{"class":3026},"// де писати\n",[3020,3120,3122,3125,3127,3130,3133],{"class":3022,"line":3121},7,[3020,3123,3124],{"class":3033},"               LogLevel",[3020,3126,3038],{"class":3037},[3020,3128,3129],{"class":3033},"Information",[3020,3131,3132],{"class":3037},",         ",[3020,3134,3135],{"class":3026},"// мінімальний рівень\n",[3020,3137,3139,3142,3144,3147],{"class":3022,"line":3138},8,[3020,3140,3141],{"class":3033},"               DbContextLoggerOptions",[3020,3143,3038],{"class":3037},[3020,3145,3146],{"class":3033},"DefaultWithLocalTime",[3020,3148,3149],{"class":3026},"  // формат\n",[3020,3151,3153],{"class":3022,"line":3152},9,[3020,3154,3155],{"class":3037},"           )\n",[3020,3157,3159,3161,3164,3167],{"class":3022,"line":3158},10,[3020,3160,3095],{"class":3037},[3020,3162,3163],{"class":3046},"EnableSensitiveDataLogging",[3020,3165,3166],{"class":3037},"()     ",[3020,3168,3169],{"class":3026},"// показувати значення параметрів\n",[3020,3171,3173,3175,3178,3181],{"class":3022,"line":3172},11,[3020,3174,3095],{"class":3037},[3020,3176,3177],{"class":3046},"EnableDetailedErrors",[3020,3179,3180],{"class":3037},"();           ",[3020,3182,3183],{"class":3026},"// детальні повідомлення про помилки\n",[3020,3185,3187],{"class":3022,"line":3186},12,[3020,3188,3189],{"class":3037},"});\n",[3010,3191,3193],{"className":3012,"code":3192,"language":3014,"meta":3015,"style":3015},"// Або через стандартний ILogger:\nbuilder.Services.AddDbContext\u003CAppDbContext>(options =>\n    options.UseSqlServer(connectionString)\n           .UseLoggerFactory(LoggerFactory.Create(b =>\n               b.AddConsole()\n                .AddFilter(\"Microsoft.EntityFrameworkCore.Database.Command\", LogLevel.Information)\n           ))\n);\n",[3017,3194,3195,3200,3222,3236,3260,3273,3299,3304],{"__ignoreMap":3015},[3020,3196,3197],{"class":3022,"line":3023},[3020,3198,3199],{"class":3026},"// Або через стандартний ILogger:\n",[3020,3201,3202,3204,3206,3208,3210,3212,3214,3216,3218,3220],{"class":3022,"line":3030},[3020,3203,3034],{"class":3033},[3020,3205,3038],{"class":3037},[3020,3207,3041],{"class":3033},[3020,3209,3038],{"class":3037},[3020,3211,3047],{"class":3046},[3020,3213,3050],{"class":3037},[3020,3215,3054],{"class":3053},[3020,3217,3057],{"class":3037},[3020,3219,3060],{"class":3033},[3020,3221,3063],{"class":3037},[3020,3223,3224,3226,3228,3230,3232,3234],{"class":3022,"line":3066},[3020,3225,3075],{"class":3033},[3020,3227,3038],{"class":3037},[3020,3229,3080],{"class":3046},[3020,3231,3083],{"class":3037},[3020,3233,3086],{"class":3033},[3020,3235,3089],{"class":3037},[3020,3237,3238,3240,3243,3245,3248,3250,3253,3255,3258],{"class":3022,"line":3072},[3020,3239,3095],{"class":3037},[3020,3241,3242],{"class":3046},"UseLoggerFactory",[3020,3244,3083],{"class":3037},[3020,3246,3247],{"class":3033},"LoggerFactory",[3020,3249,3038],{"class":3037},[3020,3251,3252],{"class":3046},"Create",[3020,3254,3083],{"class":3037},[3020,3256,3257],{"class":3033},"b",[3020,3259,3063],{"class":3037},[3020,3261,3262,3265,3267,3270],{"class":3022,"line":3092},[3020,3263,3264],{"class":3033},"               b",[3020,3266,3038],{"class":3037},[3020,3268,3269],{"class":3046},"AddConsole",[3020,3271,3272],{"class":3037},"()\n",[3020,3274,3275,3278,3281,3283,3287,3290,3293,3295,3297],{"class":3022,"line":3104},[3020,3276,3277],{"class":3037},"                .",[3020,3279,3280],{"class":3046},"AddFilter",[3020,3282,3083],{"class":3037},[3020,3284,3286],{"class":3285},"sbdoH","\"Microsoft.EntityFrameworkCore.Database.Command\"",[3020,3288,3289],{"class":3037},", ",[3020,3291,3292],{"class":3033},"LogLevel",[3020,3294,3038],{"class":3037},[3020,3296,3129],{"class":3033},[3020,3298,3089],{"class":3037},[3020,3300,3301],{"class":3022,"line":3121},[3020,3302,3303],{"class":3037},"           ))\n",[3020,3305,3306],{"class":3022,"line":3138},[3020,3307,3308],{"class":3037},");\n",[3005,3310,3312],{"id":3311},"приклад-виводу-логів","Приклад виводу логів",[2965,3314,3315],{},"Виглядає так (і це те що треба постійно читати під час розробки):",[3010,3317,3322],{"className":3318,"code":3320,"language":3321},[3319],"language-text","info: Microsoft.EntityFrameworkCore.Database.Command[20101]\n      Executed DbCommand (3ms) [Parameters=[@__categoryId_0='2'], CommandType='Text', CommandTimeout='30']\n      SELECT [p].[Id], [p].[Name], [p].[Price], [p].[CategoryId]\n      FROM [Products] AS [p]\n      WHERE [p].[CategoryId] = @__categoryId_0\n      AND [p].[IsActive] = CAST(1 AS bit)\n      ORDER BY [p].[Price]\n","text",[3017,3323,3320],{"__ignoreMap":3015},[2965,3325,3326,3327,3330,3331,3334,3335,3338],{},"Зверніть на ",[2969,3328,3329],{},"час виконання"," (3ms) і ",[2969,3332,3333],{},"параметри"," (",[3017,3336,3337],{},"@__categoryId_0='2'","). Якщо бачите 500ms — щось не так. Якщо бачите цей запит 100 разів — N+1.",[3005,3340,3342],{"id":3341},"ef-core-diagnostics-глибший-рівень","EF Core Diagnostics: глибший рівень",[2965,3344,3345,3348,3349,3352,3353,3356],{},[3017,3346,3347],{},"DiagnosticListener"," — внутрішня шина подій .NET що EF Core використовує для публікації детальної діагностики. Підписавшись на неї — можна отримувати подію ",[2969,3350,3351],{},"перед"," і ",[2969,3354,3355],{},"після"," кожного запиту:",[3010,3358,3360],{"className":3012,"code":3359,"language":3014,"meta":3015,"style":3015},"// Кастомний DiagnosticListener для EF Core\npublic class EfCoreDiagnosticObserver : IObserver\u003CDiagnosticListener>\n{\n    public void OnNext(DiagnosticListener listener)\n    {\n        if (listener.Name == DbLoggerCategory.Name)   // \"Microsoft.EntityFrameworkCore\"\n        {\n            listener.Subscribe(new EfCoreCommandObserver());\n        }\n    }\n\n    public void OnError(Exception error) { }\n    public void OnCompleted() { }\n}\n\npublic class EfCoreCommandObserver : IObserver\u003CKeyValuePair\u003Cstring, object?>>\n{\n    public void OnNext(KeyValuePair\u003Cstring, object?> value)\n    {\n        // Подія: SQL команда виконана\n        if (value.Key == RelationalEventId.CommandExecuted.Name)\n        {\n            var data = (CommandExecutedEventData)value.Value!;\n            Console.WriteLine($\"SQL ({data.Duration.TotalMilliseconds:F1}ms): {data.Command.CommandText}\");\n        }\n\n        // Подія: повільний запит\n        if (value.Key == \"Microsoft.EntityFrameworkCore.Database.Command.CommandError\")\n        {\n            Console.Error.WriteLine(\"Query FAILED!\");\n        }\n    }\n\n    public void OnError(Exception error) { }\n    public void OnCompleted() { }\n}\n\n// Реєстрація:\nDiagnosticListener.AllListeners.Subscribe(new EfCoreDiagnosticObserver());\n",[3017,3361,3362,3367,3392,3396,3416,3421,3453,3458,3479,3484,3489,3495,3515,3528,3534,3539,3570,3575,3604,3609,3615,3645,3650,3678,3743,3748,3753,3759,3779,3784,3805,3810,3815,3820,3837,3848,3853,3858,3864],{"__ignoreMap":3015},[3020,3363,3364],{"class":3022,"line":3023},[3020,3365,3366],{"class":3026},"// Кастомний DiagnosticListener для EF Core\n",[3020,3368,3369,3373,3376,3379,3382,3385,3387,3389],{"class":3022,"line":3030},[3020,3370,3372],{"class":3371},"su1O8","public",[3020,3374,3375],{"class":3371}," class",[3020,3377,3378],{"class":3053}," EfCoreDiagnosticObserver",[3020,3380,3381],{"class":3037}," : ",[3020,3383,3384],{"class":3053},"IObserver",[3020,3386,3050],{"class":3037},[3020,3388,3347],{"class":3053},[3020,3390,3391],{"class":3037},">\n",[3020,3393,3394],{"class":3022,"line":3066},[3020,3395,3069],{"class":3037},[3020,3397,3398,3401,3404,3407,3409,3411,3414],{"class":3022,"line":3072},[3020,3399,3400],{"class":3371},"    public",[3020,3402,3403],{"class":3371}," void",[3020,3405,3406],{"class":3046}," OnNext",[3020,3408,3083],{"class":3037},[3020,3410,3347],{"class":3053},[3020,3412,3413],{"class":3033}," listener",[3020,3415,3089],{"class":3037},[3020,3417,3418],{"class":3022,"line":3092},[3020,3419,3420],{"class":3037},"    {\n",[3020,3422,3423,3427,3429,3432,3434,3437,3440,3443,3445,3447,3450],{"class":3022,"line":3104},[3020,3424,3426],{"class":3425},"sCDza","        if",[3020,3428,3334],{"class":3037},[3020,3430,3431],{"class":3033},"listener",[3020,3433,3038],{"class":3037},[3020,3435,3436],{"class":3033},"Name",[3020,3438,3439],{"class":3037}," == ",[3020,3441,3442],{"class":3033},"DbLoggerCategory",[3020,3444,3038],{"class":3037},[3020,3446,3436],{"class":3033},[3020,3448,3449],{"class":3037},")   ",[3020,3451,3452],{"class":3026},"// \"Microsoft.EntityFrameworkCore\"\n",[3020,3454,3455],{"class":3022,"line":3121},[3020,3456,3457],{"class":3037},"        {\n",[3020,3459,3460,3463,3465,3468,3470,3473,3476],{"class":3022,"line":3138},[3020,3461,3462],{"class":3033},"            listener",[3020,3464,3038],{"class":3037},[3020,3466,3467],{"class":3046},"Subscribe",[3020,3469,3083],{"class":3037},[3020,3471,3472],{"class":3371},"new",[3020,3474,3475],{"class":3053}," EfCoreCommandObserver",[3020,3477,3478],{"class":3037},"());\n",[3020,3480,3481],{"class":3022,"line":3152},[3020,3482,3483],{"class":3037},"        }\n",[3020,3485,3486],{"class":3022,"line":3158},[3020,3487,3488],{"class":3037},"    }\n",[3020,3490,3491],{"class":3022,"line":3172},[3020,3492,3494],{"emptyLinePlaceholder":3493},true,"\n",[3020,3496,3497,3499,3501,3504,3506,3509,3512],{"class":3022,"line":3186},[3020,3498,3400],{"class":3371},[3020,3500,3403],{"class":3371},[3020,3502,3503],{"class":3046}," OnError",[3020,3505,3083],{"class":3037},[3020,3507,3508],{"class":3053},"Exception",[3020,3510,3511],{"class":3033}," error",[3020,3513,3514],{"class":3037},") { }\n",[3020,3516,3518,3520,3522,3525],{"class":3022,"line":3517},13,[3020,3519,3400],{"class":3371},[3020,3521,3403],{"class":3371},[3020,3523,3524],{"class":3046}," OnCompleted",[3020,3526,3527],{"class":3037},"() { }\n",[3020,3529,3531],{"class":3022,"line":3530},14,[3020,3532,3533],{"class":3037},"}\n",[3020,3535,3537],{"class":3022,"line":3536},15,[3020,3538,3494],{"emptyLinePlaceholder":3493},[3020,3540,3542,3544,3546,3548,3550,3552,3554,3557,3559,3562,3564,3567],{"class":3022,"line":3541},16,[3020,3543,3372],{"class":3371},[3020,3545,3375],{"class":3371},[3020,3547,3475],{"class":3053},[3020,3549,3381],{"class":3037},[3020,3551,3384],{"class":3053},[3020,3553,3050],{"class":3037},[3020,3555,3556],{"class":3053},"KeyValuePair",[3020,3558,3050],{"class":3037},[3020,3560,3561],{"class":3371},"string",[3020,3563,3289],{"class":3037},[3020,3565,3566],{"class":3371},"object",[3020,3568,3569],{"class":3037},"?>>\n",[3020,3571,3573],{"class":3022,"line":3572},17,[3020,3574,3069],{"class":3037},[3020,3576,3578,3580,3582,3584,3586,3588,3590,3592,3594,3596,3599,3602],{"class":3022,"line":3577},18,[3020,3579,3400],{"class":3371},[3020,3581,3403],{"class":3371},[3020,3583,3406],{"class":3046},[3020,3585,3083],{"class":3037},[3020,3587,3556],{"class":3053},[3020,3589,3050],{"class":3037},[3020,3591,3561],{"class":3371},[3020,3593,3289],{"class":3037},[3020,3595,3566],{"class":3371},[3020,3597,3598],{"class":3037},"?> ",[3020,3600,3601],{"class":3033},"value",[3020,3603,3089],{"class":3037},[3020,3605,3607],{"class":3022,"line":3606},19,[3020,3608,3420],{"class":3037},[3020,3610,3612],{"class":3022,"line":3611},20,[3020,3613,3614],{"class":3026},"        // Подія: SQL команда виконана\n",[3020,3616,3618,3620,3622,3624,3626,3629,3631,3634,3636,3639,3641,3643],{"class":3022,"line":3617},21,[3020,3619,3426],{"class":3425},[3020,3621,3334],{"class":3037},[3020,3623,3601],{"class":3033},[3020,3625,3038],{"class":3037},[3020,3627,3628],{"class":3033},"Key",[3020,3630,3439],{"class":3037},[3020,3632,3633],{"class":3033},"RelationalEventId",[3020,3635,3038],{"class":3037},[3020,3637,3638],{"class":3033},"CommandExecuted",[3020,3640,3038],{"class":3037},[3020,3642,3436],{"class":3033},[3020,3644,3089],{"class":3037},[3020,3646,3648],{"class":3022,"line":3647},22,[3020,3649,3457],{"class":3037},[3020,3651,3653,3656,3659,3662,3665,3668,3670,3672,3675],{"class":3022,"line":3652},23,[3020,3654,3655],{"class":3371},"            var",[3020,3657,3658],{"class":3033}," data",[3020,3660,3661],{"class":3037}," = (",[3020,3663,3664],{"class":3053},"CommandExecutedEventData",[3020,3666,3667],{"class":3037},")",[3020,3669,3601],{"class":3033},[3020,3671,3038],{"class":3037},[3020,3673,3674],{"class":3033},"Value",[3020,3676,3677],{"class":3037},"!;\n",[3020,3679,3681,3684,3686,3688,3690,3693,3697,3700,3702,3705,3707,3710,3713,3716,3719,3722,3724,3726,3728,3731,3733,3736,3738,3741],{"class":3022,"line":3680},24,[3020,3682,3683],{"class":3033},"            Console",[3020,3685,3038],{"class":3037},[3020,3687,3112],{"class":3046},[3020,3689,3083],{"class":3037},[3020,3691,3692],{"class":3285},"$\"SQL (",[3020,3694,3696],{"class":3695},"sD7JJ","{",[3020,3698,3699],{"class":3033},"data",[3020,3701,3038],{"class":3695},[3020,3703,3704],{"class":3033},"Duration",[3020,3706,3038],{"class":3695},[3020,3708,3709],{"class":3033},"TotalMilliseconds",[3020,3711,3712],{"class":3037},":",[3020,3714,3715],{"class":3033},"F1",[3020,3717,3718],{"class":3695},"}",[3020,3720,3721],{"class":3285},"ms): ",[3020,3723,3696],{"class":3695},[3020,3725,3699],{"class":3033},[3020,3727,3038],{"class":3695},[3020,3729,3730],{"class":3033},"Command",[3020,3732,3038],{"class":3695},[3020,3734,3735],{"class":3033},"CommandText",[3020,3737,3718],{"class":3695},[3020,3739,3740],{"class":3285},"\"",[3020,3742,3308],{"class":3037},[3020,3744,3746],{"class":3022,"line":3745},25,[3020,3747,3483],{"class":3037},[3020,3749,3751],{"class":3022,"line":3750},26,[3020,3752,3494],{"emptyLinePlaceholder":3493},[3020,3754,3756],{"class":3022,"line":3755},27,[3020,3757,3758],{"class":3026},"        // Подія: повільний запит\n",[3020,3760,3762,3764,3766,3768,3770,3772,3774,3777],{"class":3022,"line":3761},28,[3020,3763,3426],{"class":3425},[3020,3765,3334],{"class":3037},[3020,3767,3601],{"class":3033},[3020,3769,3038],{"class":3037},[3020,3771,3628],{"class":3033},[3020,3773,3439],{"class":3037},[3020,3775,3776],{"class":3285},"\"Microsoft.EntityFrameworkCore.Database.Command.CommandError\"",[3020,3778,3089],{"class":3037},[3020,3780,3782],{"class":3022,"line":3781},29,[3020,3783,3457],{"class":3037},[3020,3785,3787,3789,3791,3794,3796,3798,3800,3803],{"class":3022,"line":3786},30,[3020,3788,3683],{"class":3033},[3020,3790,3038],{"class":3037},[3020,3792,3793],{"class":3033},"Error",[3020,3795,3038],{"class":3037},[3020,3797,3112],{"class":3046},[3020,3799,3083],{"class":3037},[3020,3801,3802],{"class":3285},"\"Query FAILED!\"",[3020,3804,3308],{"class":3037},[3020,3806,3808],{"class":3022,"line":3807},31,[3020,3809,3483],{"class":3037},[3020,3811,3813],{"class":3022,"line":3812},32,[3020,3814,3488],{"class":3037},[3020,3816,3818],{"class":3022,"line":3817},33,[3020,3819,3494],{"emptyLinePlaceholder":3493},[3020,3821,3823,3825,3827,3829,3831,3833,3835],{"class":3022,"line":3822},34,[3020,3824,3400],{"class":3371},[3020,3826,3403],{"class":3371},[3020,3828,3503],{"class":3046},[3020,3830,3083],{"class":3037},[3020,3832,3508],{"class":3053},[3020,3834,3511],{"class":3033},[3020,3836,3514],{"class":3037},[3020,3838,3840,3842,3844,3846],{"class":3022,"line":3839},35,[3020,3841,3400],{"class":3371},[3020,3843,3403],{"class":3371},[3020,3845,3524],{"class":3046},[3020,3847,3527],{"class":3037},[3020,3849,3851],{"class":3022,"line":3850},36,[3020,3852,3533],{"class":3037},[3020,3854,3856],{"class":3022,"line":3855},37,[3020,3857,3494],{"emptyLinePlaceholder":3493},[3020,3859,3861],{"class":3022,"line":3860},38,[3020,3862,3863],{"class":3026},"// Реєстрація:\n",[3020,3865,3867,3869,3871,3874,3876,3878,3880,3882,3884],{"class":3022,"line":3866},39,[3020,3868,3347],{"class":3033},[3020,3870,3038],{"class":3037},[3020,3872,3873],{"class":3033},"AllListeners",[3020,3875,3038],{"class":3037},[3020,3877,3467],{"class":3046},[3020,3879,3083],{"class":3037},[3020,3881,3472],{"class":3371},[3020,3883,3378],{"class":3053},[3020,3885,3478],{"class":3037},[3005,3887,3889],{"id":3888},"slow-query-detection-автоматичне-виявлення-повільних-запитів","Slow Query Detection: автоматичне виявлення повільних запитів",[3010,3891,3893],{"className":3012,"code":3892,"language":3014,"meta":3015,"style":3015},"// Middleware або фільтр для виявлення повільних запитів\npublic class SlowQueryLoggingInterceptor : DbCommandInterceptor\n{\n    private readonly ILogger\u003CSlowQueryLoggingInterceptor> _logger;\n    private readonly TimeSpan _threshold = TimeSpan.FromMilliseconds(500);\n\n    public SlowQueryLoggingInterceptor(ILogger\u003CSlowQueryLoggingInterceptor> logger)\n        => _logger = logger;\n\n    public override DbDataReader ReaderExecuted(\n        DbCommand command,\n        CommandExecutedEventData eventData,\n        DbDataReader result)\n    {\n        if (eventData.Duration >= _threshold)\n        {\n            _logger.LogWarning(\n                \"Slow query detected ({Duration}ms):\\n{SQL}\",\n                eventData.Duration.TotalMilliseconds,\n                command.CommandText);\n        }\n        return result;\n    }\n\n    public override ValueTask\u003CDbDataReader> ReaderExecutedAsync(\n        DbCommand command,\n        CommandExecutedEventData eventData,\n        DbDataReader result,\n        CancellationToken ct = default)\n    {\n        if (eventData.Duration >= _threshold)\n        {\n            _logger.LogWarning(\n                \"Slow query detected ({Duration}ms):\\n{SQL}\",\n                eventData.Duration.TotalMilliseconds,\n                command.CommandText);\n        }\n        return ValueTask.FromResult(result);\n    }\n}\n\n// Реєстрація:\nbuilder.Services.AddDbContext\u003CAppDbContext>((sp, options) =>\n    options.UseSqlServer(connectionString)\n           .AddInterceptors(sp.GetRequiredService\u003CSlowQueryLoggingInterceptor>()));\n\nbuilder.Services.AddSingleton\u003CSlowQueryLoggingInterceptor>();\n",[3017,3894,3895,3900,3914,3918,3943,3974,3978,4000,4013,4017,4032,4043,4053,4063,4067,4088,4092,4104,4118,4133,4144,4148,4157,4161,4165,4186,4194,4202,4210,4225,4229,4247,4251,4261,4271,4285,4295,4299,4317,4321,4326,4331,4336,4366,4381,4405,4410],{"__ignoreMap":3015},[3020,3896,3897],{"class":3022,"line":3023},[3020,3898,3899],{"class":3026},"// Middleware або фільтр для виявлення повільних запитів\n",[3020,3901,3902,3904,3906,3909,3911],{"class":3022,"line":3030},[3020,3903,3372],{"class":3371},[3020,3905,3375],{"class":3371},[3020,3907,3908],{"class":3053}," SlowQueryLoggingInterceptor",[3020,3910,3381],{"class":3037},[3020,3912,3913],{"class":3053},"DbCommandInterceptor\n",[3020,3915,3916],{"class":3022,"line":3066},[3020,3917,3069],{"class":3037},[3020,3919,3920,3923,3926,3929,3931,3934,3937,3940],{"class":3022,"line":3072},[3020,3921,3922],{"class":3371},"    private",[3020,3924,3925],{"class":3371}," readonly",[3020,3927,3928],{"class":3053}," ILogger",[3020,3930,3050],{"class":3037},[3020,3932,3933],{"class":3053},"SlowQueryLoggingInterceptor",[3020,3935,3936],{"class":3037},"> ",[3020,3938,3939],{"class":3033},"_logger",[3020,3941,3942],{"class":3037},";\n",[3020,3944,3945,3947,3949,3952,3955,3958,3961,3963,3966,3968,3972],{"class":3022,"line":3092},[3020,3946,3922],{"class":3371},[3020,3948,3925],{"class":3371},[3020,3950,3951],{"class":3053}," TimeSpan",[3020,3953,3954],{"class":3033}," _threshold",[3020,3956,3957],{"class":3037}," = ",[3020,3959,3960],{"class":3033},"TimeSpan",[3020,3962,3038],{"class":3037},[3020,3964,3965],{"class":3046},"FromMilliseconds",[3020,3967,3083],{"class":3037},[3020,3969,3971],{"class":3970},"sJj4R","500",[3020,3973,3308],{"class":3037},[3020,3975,3976],{"class":3022,"line":3104},[3020,3977,3494],{"emptyLinePlaceholder":3493},[3020,3979,3980,3982,3984,3986,3989,3991,3993,3995,3998],{"class":3022,"line":3121},[3020,3981,3400],{"class":3371},[3020,3983,3908],{"class":3046},[3020,3985,3083],{"class":3037},[3020,3987,3988],{"class":3053},"ILogger",[3020,3990,3050],{"class":3037},[3020,3992,3933],{"class":3053},[3020,3994,3936],{"class":3037},[3020,3996,3997],{"class":3033},"logger",[3020,3999,3089],{"class":3037},[3020,4001,4002,4005,4007,4009,4011],{"class":3022,"line":3138},[3020,4003,4004],{"class":3037},"        => ",[3020,4006,3939],{"class":3033},[3020,4008,3957],{"class":3037},[3020,4010,3997],{"class":3033},[3020,4012,3942],{"class":3037},[3020,4014,4015],{"class":3022,"line":3152},[3020,4016,3494],{"emptyLinePlaceholder":3493},[3020,4018,4019,4021,4024,4027,4030],{"class":3022,"line":3158},[3020,4020,3400],{"class":3371},[3020,4022,4023],{"class":3371}," override",[3020,4025,4026],{"class":3053}," DbDataReader",[3020,4028,4029],{"class":3046}," ReaderExecuted",[3020,4031,3101],{"class":3037},[3020,4033,4034,4037,4040],{"class":3022,"line":3172},[3020,4035,4036],{"class":3053},"        DbCommand",[3020,4038,4039],{"class":3033}," command",[3020,4041,4042],{"class":3037},",\n",[3020,4044,4045,4048,4051],{"class":3022,"line":3186},[3020,4046,4047],{"class":3053},"        CommandExecutedEventData",[3020,4049,4050],{"class":3033}," eventData",[3020,4052,4042],{"class":3037},[3020,4054,4055,4058,4061],{"class":3022,"line":3517},[3020,4056,4057],{"class":3053},"        DbDataReader",[3020,4059,4060],{"class":3033}," result",[3020,4062,3089],{"class":3037},[3020,4064,4065],{"class":3022,"line":3530},[3020,4066,3420],{"class":3037},[3020,4068,4069,4071,4073,4076,4078,4080,4083,4086],{"class":3022,"line":3536},[3020,4070,3426],{"class":3425},[3020,4072,3334],{"class":3037},[3020,4074,4075],{"class":3033},"eventData",[3020,4077,3038],{"class":3037},[3020,4079,3704],{"class":3033},[3020,4081,4082],{"class":3037}," >= ",[3020,4084,4085],{"class":3033},"_threshold",[3020,4087,3089],{"class":3037},[3020,4089,4090],{"class":3022,"line":3541},[3020,4091,3457],{"class":3037},[3020,4093,4094,4097,4099,4102],{"class":3022,"line":3572},[3020,4095,4096],{"class":3033},"            _logger",[3020,4098,3038],{"class":3037},[3020,4100,4101],{"class":3046},"LogWarning",[3020,4103,3101],{"class":3037},[3020,4105,4106,4109,4113,4116],{"class":3022,"line":3577},[3020,4107,4108],{"class":3285},"                \"Slow query detected ({Duration}ms):",[3020,4110,4112],{"class":4111},"sjcCO","\\n",[3020,4114,4115],{"class":3285},"{SQL}\"",[3020,4117,4042],{"class":3037},[3020,4119,4120,4123,4125,4127,4129,4131],{"class":3022,"line":3606},[3020,4121,4122],{"class":3033},"                eventData",[3020,4124,3038],{"class":3037},[3020,4126,3704],{"class":3033},[3020,4128,3038],{"class":3037},[3020,4130,3709],{"class":3033},[3020,4132,4042],{"class":3037},[3020,4134,4135,4138,4140,4142],{"class":3022,"line":3611},[3020,4136,4137],{"class":3033},"                command",[3020,4139,3038],{"class":3037},[3020,4141,3735],{"class":3033},[3020,4143,3308],{"class":3037},[3020,4145,4146],{"class":3022,"line":3617},[3020,4147,3483],{"class":3037},[3020,4149,4150,4153,4155],{"class":3022,"line":3647},[3020,4151,4152],{"class":3425},"        return",[3020,4154,4060],{"class":3033},[3020,4156,3942],{"class":3037},[3020,4158,4159],{"class":3022,"line":3652},[3020,4160,3488],{"class":3037},[3020,4162,4163],{"class":3022,"line":3680},[3020,4164,3494],{"emptyLinePlaceholder":3493},[3020,4166,4167,4169,4171,4174,4176,4179,4181,4184],{"class":3022,"line":3745},[3020,4168,3400],{"class":3371},[3020,4170,4023],{"class":3371},[3020,4172,4173],{"class":3053}," ValueTask",[3020,4175,3050],{"class":3037},[3020,4177,4178],{"class":3053},"DbDataReader",[3020,4180,3936],{"class":3037},[3020,4182,4183],{"class":3046},"ReaderExecutedAsync",[3020,4185,3101],{"class":3037},[3020,4187,4188,4190,4192],{"class":3022,"line":3750},[3020,4189,4036],{"class":3053},[3020,4191,4039],{"class":3033},[3020,4193,4042],{"class":3037},[3020,4195,4196,4198,4200],{"class":3022,"line":3755},[3020,4197,4047],{"class":3053},[3020,4199,4050],{"class":3033},[3020,4201,4042],{"class":3037},[3020,4203,4204,4206,4208],{"class":3022,"line":3761},[3020,4205,4057],{"class":3053},[3020,4207,4060],{"class":3033},[3020,4209,4042],{"class":3037},[3020,4211,4212,4215,4218,4220,4223],{"class":3022,"line":3781},[3020,4213,4214],{"class":3053},"        CancellationToken",[3020,4216,4217],{"class":3033}," ct",[3020,4219,3957],{"class":3037},[3020,4221,4222],{"class":3371},"default",[3020,4224,3089],{"class":3037},[3020,4226,4227],{"class":3022,"line":3786},[3020,4228,3420],{"class":3037},[3020,4230,4231,4233,4235,4237,4239,4241,4243,4245],{"class":3022,"line":3807},[3020,4232,3426],{"class":3425},[3020,4234,3334],{"class":3037},[3020,4236,4075],{"class":3033},[3020,4238,3038],{"class":3037},[3020,4240,3704],{"class":3033},[3020,4242,4082],{"class":3037},[3020,4244,4085],{"class":3033},[3020,4246,3089],{"class":3037},[3020,4248,4249],{"class":3022,"line":3812},[3020,4250,3457],{"class":3037},[3020,4252,4253,4255,4257,4259],{"class":3022,"line":3817},[3020,4254,4096],{"class":3033},[3020,4256,3038],{"class":3037},[3020,4258,4101],{"class":3046},[3020,4260,3101],{"class":3037},[3020,4262,4263,4265,4267,4269],{"class":3022,"line":3822},[3020,4264,4108],{"class":3285},[3020,4266,4112],{"class":4111},[3020,4268,4115],{"class":3285},[3020,4270,4042],{"class":3037},[3020,4272,4273,4275,4277,4279,4281,4283],{"class":3022,"line":3839},[3020,4274,4122],{"class":3033},[3020,4276,3038],{"class":3037},[3020,4278,3704],{"class":3033},[3020,4280,3038],{"class":3037},[3020,4282,3709],{"class":3033},[3020,4284,4042],{"class":3037},[3020,4286,4287,4289,4291,4293],{"class":3022,"line":3850},[3020,4288,4137],{"class":3033},[3020,4290,3038],{"class":3037},[3020,4292,3735],{"class":3033},[3020,4294,3308],{"class":3037},[3020,4296,4297],{"class":3022,"line":3855},[3020,4298,3483],{"class":3037},[3020,4300,4301,4303,4305,4307,4310,4312,4315],{"class":3022,"line":3860},[3020,4302,4152],{"class":3425},[3020,4304,4173],{"class":3033},[3020,4306,3038],{"class":3037},[3020,4308,4309],{"class":3046},"FromResult",[3020,4311,3083],{"class":3037},[3020,4313,4314],{"class":3033},"result",[3020,4316,3308],{"class":3037},[3020,4318,4319],{"class":3022,"line":3866},[3020,4320,3488],{"class":3037},[3020,4322,4324],{"class":3022,"line":4323},40,[3020,4325,3533],{"class":3037},[3020,4327,4329],{"class":3022,"line":4328},41,[3020,4330,3494],{"emptyLinePlaceholder":3493},[3020,4332,4334],{"class":3022,"line":4333},42,[3020,4335,3863],{"class":3026},[3020,4337,4339,4341,4343,4345,4347,4349,4351,4353,4356,4359,4361,4363],{"class":3022,"line":4338},43,[3020,4340,3034],{"class":3033},[3020,4342,3038],{"class":3037},[3020,4344,3041],{"class":3033},[3020,4346,3038],{"class":3037},[3020,4348,3047],{"class":3046},[3020,4350,3050],{"class":3037},[3020,4352,3054],{"class":3053},[3020,4354,4355],{"class":3037},">((",[3020,4357,4358],{"class":3033},"sp",[3020,4360,3289],{"class":3037},[3020,4362,3060],{"class":3033},[3020,4364,4365],{"class":3037},") =>\n",[3020,4367,4369,4371,4373,4375,4377,4379],{"class":3022,"line":4368},44,[3020,4370,3075],{"class":3033},[3020,4372,3038],{"class":3037},[3020,4374,3080],{"class":3046},[3020,4376,3083],{"class":3037},[3020,4378,3086],{"class":3033},[3020,4380,3089],{"class":3037},[3020,4382,4384,4386,4389,4391,4393,4395,4398,4400,4402],{"class":3022,"line":4383},45,[3020,4385,3095],{"class":3037},[3020,4387,4388],{"class":3046},"AddInterceptors",[3020,4390,3083],{"class":3037},[3020,4392,4358],{"class":3033},[3020,4394,3038],{"class":3037},[3020,4396,4397],{"class":3046},"GetRequiredService",[3020,4399,3050],{"class":3037},[3020,4401,3933],{"class":3053},[3020,4403,4404],{"class":3037},">()));\n",[3020,4406,4408],{"class":3022,"line":4407},46,[3020,4409,3494],{"emptyLinePlaceholder":3493},[3020,4411,4413,4415,4417,4419,4421,4424,4426,4428],{"class":3022,"line":4412},47,[3020,4414,3034],{"class":3033},[3020,4416,3038],{"class":3037},[3020,4418,3041],{"class":3033},[3020,4420,3038],{"class":3037},[3020,4422,4423],{"class":3046},"AddSingleton",[3020,4425,3050],{"class":3037},[3020,4427,3933],{"class":3053},[3020,4429,4430],{"class":3037},">();\n",[2991,4432],{},[2960,4434,4436],{"id":4435},"n1-problem-найдорожчий-антипатерн-orm","N+1 Problem: найдорожчий антипатерн ORM",[2965,4438,4439],{},"N+1 — найпоширеніша і найруйнівніша проблема продуктивності у будь-якому ORM, включаючи EF Core. Її назва описує математику: замість 1 SQL запиту виконується 1 + N запитів де N — кількість батьківських записів.",[3005,4441,4443],{"id":4442},"класична-демонстрація","Класична демонстрація",[2965,4445,4446],{},"Маємо задачу: вивести список замовлень з іменем клієнта для кожного.",[3010,4448,4450],{"className":3012,"code":4449,"language":3014,"meta":3015,"style":3015},"// ❌ N+1 АНТИПАТЕРН:\nvar orders = await context.Orders.ToListAsync();  // ЗАПИТ 1: SELECT всі Orders\n\nforeach (var order in orders)\n{\n    // Для кожного Order — окремий запит до Customers!\n    Console.WriteLine($\"{order.Id}: {order.Customer.Name}\");\n    //                               ↑ lazy load або auto-include\n    // ЗАПИТ 2: SELECT Customer WHERE Id = 1\n    // ЗАПИТ 3: SELECT Customer WHERE Id = 2\n    // ЗАПИТ 4: SELECT Customer WHERE Id = 3\n    // ... до ЗАПИТУ N+1\n}\n\n// При 1000 замовленнях: 1001 SQL запит!\n// При 100,000 замовленнях: 100,001 SQL запит!\n",[3017,4451,4452,4457,4489,4493,4512,4516,4521,4569,4574,4579,4584,4589,4594,4598,4602,4607],{"__ignoreMap":3015},[3020,4453,4454],{"class":3022,"line":3023},[3020,4455,4456],{"class":3026},"// ❌ N+1 АНТИПАТЕРН:\n",[3020,4458,4459,4462,4465,4467,4470,4473,4475,4478,4480,4483,4486],{"class":3022,"line":3030},[3020,4460,4461],{"class":3371},"var",[3020,4463,4464],{"class":3033}," orders",[3020,4466,3957],{"class":3037},[3020,4468,4469],{"class":3371},"await",[3020,4471,4472],{"class":3033}," context",[3020,4474,3038],{"class":3037},[3020,4476,4477],{"class":3033},"Orders",[3020,4479,3038],{"class":3037},[3020,4481,4482],{"class":3046},"ToListAsync",[3020,4484,4485],{"class":3037},"();  ",[3020,4487,4488],{"class":3026},"// ЗАПИТ 1: SELECT всі Orders\n",[3020,4490,4491],{"class":3022,"line":3066},[3020,4492,3494],{"emptyLinePlaceholder":3493},[3020,4494,4495,4498,4500,4502,4505,4508,4510],{"class":3022,"line":3072},[3020,4496,4497],{"class":3425},"foreach",[3020,4499,3334],{"class":3037},[3020,4501,4461],{"class":3371},[3020,4503,4504],{"class":3033}," order",[3020,4506,4507],{"class":3425}," in",[3020,4509,4464],{"class":3033},[3020,4511,3089],{"class":3037},[3020,4513,4514],{"class":3022,"line":3092},[3020,4515,3069],{"class":3037},[3020,4517,4518],{"class":3022,"line":3104},[3020,4519,4520],{"class":3026},"    // Для кожного Order — окремий запит до Customers!\n",[3020,4522,4523,4526,4528,4530,4532,4535,4537,4540,4542,4545,4547,4550,4552,4554,4556,4559,4561,4563,4565,4567],{"class":3022,"line":3121},[3020,4524,4525],{"class":3033},"    Console",[3020,4527,3038],{"class":3037},[3020,4529,3112],{"class":3046},[3020,4531,3083],{"class":3037},[3020,4533,4534],{"class":3285},"$\"",[3020,4536,3696],{"class":3695},[3020,4538,4539],{"class":3033},"order",[3020,4541,3038],{"class":3695},[3020,4543,4544],{"class":3033},"Id",[3020,4546,3718],{"class":3695},[3020,4548,4549],{"class":3285},": ",[3020,4551,3696],{"class":3695},[3020,4553,4539],{"class":3033},[3020,4555,3038],{"class":3695},[3020,4557,4558],{"class":3033},"Customer",[3020,4560,3038],{"class":3695},[3020,4562,3436],{"class":3033},[3020,4564,3718],{"class":3695},[3020,4566,3740],{"class":3285},[3020,4568,3308],{"class":3037},[3020,4570,4571],{"class":3022,"line":3138},[3020,4572,4573],{"class":3026},"    //                               ↑ lazy load або auto-include\n",[3020,4575,4576],{"class":3022,"line":3152},[3020,4577,4578],{"class":3026},"    // ЗАПИТ 2: SELECT Customer WHERE Id = 1\n",[3020,4580,4581],{"class":3022,"line":3158},[3020,4582,4583],{"class":3026},"    // ЗАПИТ 3: SELECT Customer WHERE Id = 2\n",[3020,4585,4586],{"class":3022,"line":3172},[3020,4587,4588],{"class":3026},"    // ЗАПИТ 4: SELECT Customer WHERE Id = 3\n",[3020,4590,4591],{"class":3022,"line":3186},[3020,4592,4593],{"class":3026},"    // ... до ЗАПИТУ N+1\n",[3020,4595,4596],{"class":3022,"line":3517},[3020,4597,3533],{"class":3037},[3020,4599,4600],{"class":3022,"line":3530},[3020,4601,3494],{"emptyLinePlaceholder":3493},[3020,4603,4604],{"class":3022,"line":3536},[3020,4605,4606],{"class":3026},"// При 1000 замовленнях: 1001 SQL запит!\n",[3020,4608,4609],{"class":3022,"line":3541},[3020,4610,4611],{"class":3026},"// При 100,000 замовленнях: 100,001 SQL запит!\n",[2965,4613,4614],{},"З увімкненим SQL logging ви побачите:",[3010,4616,4620],{"className":4617,"code":4618,"language":4619,"meta":3015,"style":3015},"language-sql shiki shiki-themes light-plus dark-plus dark-plus","-- Запит 1:\nSELECT [o].[Id], [o].[CustomerId], [o].[TotalAmount], [o].[PlacedAt]\nFROM [Orders] AS [o]\n\n-- Запит 2:\nSELECT [c].[Id], [c].[Name], [c].[Email]\nFROM [Customers] AS [c]\nWHERE [c].[Id] = 1\n\n-- Запит 3:\nSELECT [c].[Id], [c].[Name], [c].[Email]\nFROM [Customers] AS [c]\nWHERE [c].[Id] = 2\n\n-- ... ще 998 запитів ...\n","sql",[3017,4621,4622,4627,4635,4649,4653,4658,4665,4677,4688,4692,4697,4703,4713,4722,4726],{"__ignoreMap":3015},[3020,4623,4624],{"class":3022,"line":3023},[3020,4625,4626],{"class":3026},"-- Запит 1:\n",[3020,4628,4629,4632],{"class":3022,"line":3030},[3020,4630,4631],{"class":3371},"SELECT",[3020,4633,4634],{"class":3037}," [o].[Id], [o].[CustomerId], [o].[TotalAmount], [o].[PlacedAt]\n",[3020,4636,4637,4640,4643,4646],{"class":3022,"line":3066},[3020,4638,4639],{"class":3371},"FROM",[3020,4641,4642],{"class":3037}," [Orders] ",[3020,4644,4645],{"class":3371},"AS",[3020,4647,4648],{"class":3037}," [o]\n",[3020,4650,4651],{"class":3022,"line":3072},[3020,4652,3494],{"emptyLinePlaceholder":3493},[3020,4654,4655],{"class":3022,"line":3092},[3020,4656,4657],{"class":3026},"-- Запит 2:\n",[3020,4659,4660,4662],{"class":3022,"line":3104},[3020,4661,4631],{"class":3371},[3020,4663,4664],{"class":3037}," [c].[Id], [c].[Name], [c].[Email]\n",[3020,4666,4667,4669,4672,4674],{"class":3022,"line":3121},[3020,4668,4639],{"class":3371},[3020,4670,4671],{"class":3037}," [Customers] ",[3020,4673,4645],{"class":3371},[3020,4675,4676],{"class":3037}," [c]\n",[3020,4678,4679,4682,4685],{"class":3022,"line":3138},[3020,4680,4681],{"class":3371},"WHERE",[3020,4683,4684],{"class":3037}," [c].[Id] = ",[3020,4686,4687],{"class":3970},"1\n",[3020,4689,4690],{"class":3022,"line":3152},[3020,4691,3494],{"emptyLinePlaceholder":3493},[3020,4693,4694],{"class":3022,"line":3158},[3020,4695,4696],{"class":3026},"-- Запит 3:\n",[3020,4698,4699,4701],{"class":3022,"line":3172},[3020,4700,4631],{"class":3371},[3020,4702,4664],{"class":3037},[3020,4704,4705,4707,4709,4711],{"class":3022,"line":3186},[3020,4706,4639],{"class":3371},[3020,4708,4671],{"class":3037},[3020,4710,4645],{"class":3371},[3020,4712,4676],{"class":3037},[3020,4714,4715,4717,4719],{"class":3022,"line":3517},[3020,4716,4681],{"class":3371},[3020,4718,4684],{"class":3037},[3020,4720,4721],{"class":3970},"2\n",[3020,4723,4724],{"class":3022,"line":3530},[3020,4725,3494],{"emptyLinePlaceholder":3493},[3020,4727,4728],{"class":3022,"line":3536},[3020,4729,4730],{"class":3026},"-- ... ще 998 запитів ...\n",[3005,4732,4734],{"id":4733},"чому-n1-так-легко-допустити","Чому N+1 так легко допустити",[2965,4736,4737,4738,4741],{},"EF Core пізніх версій ",[2969,4739,4740],{},"не підтримує Lazy Loading за замовчуванням"," (на відміну від EF 6). Але розробники можуть ненавмисно його увімкнути, або мають справу з API що передає об'єкти де навігаційні властивості «вантажаться» пізніше.",[2965,4743,4744],{},"Другий, менш очевидний сценарій:",[3010,4746,4748],{"className":3012,"code":4747,"language":3014,"meta":3015,"style":3015},"// ❌ Прихований N+1 через LINQ у пам'яті:\nvar categories = await context.Categories.ToListAsync();  // 1 запит\n\n// LINQ на рівні C# (не SQL!) → lazy evaluation → N запитів!\nvar summaries = categories.Select(c => new\n{\n    c.Name,\n    // ProductCount викликає навантаження Products для кожної категорії!\n    ProductCount = context.Products.Count(p => p.CategoryId == c.Id)\n}).ToList();\n\n// SQL що виконується: 1 + N запитів (N = кількість категорій)\n",[3017,4749,4750,4755,4782,4786,4791,4819,4823,4834,4839,4882,4893,4897],{"__ignoreMap":3015},[3020,4751,4752],{"class":3022,"line":3023},[3020,4753,4754],{"class":3026},"// ❌ Прихований N+1 через LINQ у пам'яті:\n",[3020,4756,4757,4759,4762,4764,4766,4768,4770,4773,4775,4777,4779],{"class":3022,"line":3030},[3020,4758,4461],{"class":3371},[3020,4760,4761],{"class":3033}," categories",[3020,4763,3957],{"class":3037},[3020,4765,4469],{"class":3371},[3020,4767,4472],{"class":3033},[3020,4769,3038],{"class":3037},[3020,4771,4772],{"class":3033},"Categories",[3020,4774,3038],{"class":3037},[3020,4776,4482],{"class":3046},[3020,4778,4485],{"class":3037},[3020,4780,4781],{"class":3026},"// 1 запит\n",[3020,4783,4784],{"class":3022,"line":3066},[3020,4785,3494],{"emptyLinePlaceholder":3493},[3020,4787,4788],{"class":3022,"line":3072},[3020,4789,4790],{"class":3026},"// LINQ на рівні C# (не SQL!) → lazy evaluation → N запитів!\n",[3020,4792,4793,4795,4798,4800,4803,4805,4808,4810,4813,4816],{"class":3022,"line":3092},[3020,4794,4461],{"class":3371},[3020,4796,4797],{"class":3033}," summaries",[3020,4799,3957],{"class":3037},[3020,4801,4802],{"class":3033},"categories",[3020,4804,3038],{"class":3037},[3020,4806,4807],{"class":3046},"Select",[3020,4809,3083],{"class":3037},[3020,4811,4812],{"class":3033},"c",[3020,4814,4815],{"class":3037}," => ",[3020,4817,4818],{"class":3371},"new\n",[3020,4820,4821],{"class":3022,"line":3104},[3020,4822,3069],{"class":3037},[3020,4824,4825,4828,4830,4832],{"class":3022,"line":3121},[3020,4826,4827],{"class":3033},"    c",[3020,4829,3038],{"class":3037},[3020,4831,3436],{"class":3033},[3020,4833,4042],{"class":3037},[3020,4835,4836],{"class":3022,"line":3138},[3020,4837,4838],{"class":3026},"    // ProductCount викликає навантаження Products для кожної категорії!\n",[3020,4840,4841,4844,4846,4849,4851,4854,4856,4859,4861,4863,4865,4867,4869,4872,4874,4876,4878,4880],{"class":3022,"line":3152},[3020,4842,4843],{"class":3033},"    ProductCount",[3020,4845,3957],{"class":3037},[3020,4847,4848],{"class":3033},"context",[3020,4850,3038],{"class":3037},[3020,4852,4853],{"class":3033},"Products",[3020,4855,3038],{"class":3037},[3020,4857,4858],{"class":3046},"Count",[3020,4860,3083],{"class":3037},[3020,4862,2965],{"class":3033},[3020,4864,4815],{"class":3037},[3020,4866,2965],{"class":3033},[3020,4868,3038],{"class":3037},[3020,4870,4871],{"class":3033},"CategoryId",[3020,4873,3439],{"class":3037},[3020,4875,4812],{"class":3033},[3020,4877,3038],{"class":3037},[3020,4879,4544],{"class":3033},[3020,4881,3089],{"class":3037},[3020,4883,4884,4887,4890],{"class":3022,"line":3158},[3020,4885,4886],{"class":3037},"}).",[3020,4888,4889],{"class":3046},"ToList",[3020,4891,4892],{"class":3037},"();\n",[3020,4894,4895],{"class":3022,"line":3172},[3020,4896,3494],{"emptyLinePlaceholder":3493},[3020,4898,4899],{"class":3022,"line":3186},[3020,4900,4901],{"class":3026},"// SQL що виконується: 1 + N запитів (N = кількість категорій)\n",[2991,4903],{},[2960,4905,4907],{"id":4906},"еволюція-вирішення-n1-від-eager-loading-до-split-query","Еволюція вирішення N+1: від Eager Loading до Split Query",[3005,4909,4911],{"id":4910},"крок-1-eager-loading-через-include","Крок 1: Eager Loading через Include",[2965,4913,4914,4915,3712],{},"Найпростіше рішення — явне завантаження пов'язаних даних через ",[3017,4916,4917],{},"Include",[3010,4919,4921],{"className":3012,"code":4920,"language":3014,"meta":3015,"style":3015},"// ✅ Eager Loading: 1 SQL з JOIN\nvar orders = await context.Orders\n    .Include(o => o.Customer)     // LEFT JOIN Customers\n    .ToListAsync();\n\n// SQL:\n// SELECT o.Id, o.CustomerId, o.TotalAmount,\n//        c.Id, c.Name, c.Email\n// FROM Orders o\n// LEFT JOIN Customers c ON c.Id = o.CustomerId\n",[3017,4922,4923,4928,4945,4971,4979,4983,4988,4993,4998,5003],{"__ignoreMap":3015},[3020,4924,4925],{"class":3022,"line":3023},[3020,4926,4927],{"class":3026},"// ✅ Eager Loading: 1 SQL з JOIN\n",[3020,4929,4930,4932,4934,4936,4938,4940,4942],{"class":3022,"line":3030},[3020,4931,4461],{"class":3371},[3020,4933,4464],{"class":3033},[3020,4935,3957],{"class":3037},[3020,4937,4469],{"class":3371},[3020,4939,4472],{"class":3033},[3020,4941,3038],{"class":3037},[3020,4943,4944],{"class":3033},"Orders\n",[3020,4946,4947,4950,4952,4954,4957,4959,4961,4963,4965,4968],{"class":3022,"line":3066},[3020,4948,4949],{"class":3037},"    .",[3020,4951,4917],{"class":3046},[3020,4953,3083],{"class":3037},[3020,4955,4956],{"class":3033},"o",[3020,4958,4815],{"class":3037},[3020,4960,4956],{"class":3033},[3020,4962,3038],{"class":3037},[3020,4964,4558],{"class":3033},[3020,4966,4967],{"class":3037},")     ",[3020,4969,4970],{"class":3026},"// LEFT JOIN Customers\n",[3020,4972,4973,4975,4977],{"class":3022,"line":3072},[3020,4974,4949],{"class":3037},[3020,4976,4482],{"class":3046},[3020,4978,4892],{"class":3037},[3020,4980,4981],{"class":3022,"line":3092},[3020,4982,3494],{"emptyLinePlaceholder":3493},[3020,4984,4985],{"class":3022,"line":3104},[3020,4986,4987],{"class":3026},"// SQL:\n",[3020,4989,4990],{"class":3022,"line":3121},[3020,4991,4992],{"class":3026},"// SELECT o.Id, o.CustomerId, o.TotalAmount,\n",[3020,4994,4995],{"class":3022,"line":3138},[3020,4996,4997],{"class":3026},"//        c.Id, c.Name, c.Email\n",[3020,4999,5000],{"class":3022,"line":3152},[3020,5001,5002],{"class":3026},"// FROM Orders o\n",[3020,5004,5005],{"class":3022,"line":3158},[3020,5006,5007],{"class":3026},"// LEFT JOIN Customers c ON c.Id = o.CustomerId\n",[2965,5009,5010],{},"Один запит — результат. Але Include має власні проблеми.",[3005,5012,5014],{"id":5013},"проблема-include-cartesian-explosion","Проблема Include: Cartesian Explosion",[2965,5016,5017],{},"При включенні кількох колекцій — рядки множаться:",[3010,5019,5021],{"className":3012,"code":5020,"language":3014,"meta":3015,"style":3015},"// ❌ Cartesian Explosion:\nvar orders = await context.Orders\n    .Include(o => o.Customer)\n    .Include(o => o.LineItems)      // колекція!\n    .Include(o => o.LineItems)\n        .ThenInclude(li => li.Product)\n    .ToListAsync();\n\n// SQL: ORDER JOIN LINE_ITEMS × JOIN PRODUCTS\n// Order з 100 позиціями × 3 JOIN = 300 рядків замість 1!\n// Order з 1000 таблиць = надсилає гігабайти даних\n",[3017,5022,5023,5028,5044,5064,5089,5109,5133,5141,5145,5150,5155],{"__ignoreMap":3015},[3020,5024,5025],{"class":3022,"line":3023},[3020,5026,5027],{"class":3026},"// ❌ Cartesian Explosion:\n",[3020,5029,5030,5032,5034,5036,5038,5040,5042],{"class":3022,"line":3030},[3020,5031,4461],{"class":3371},[3020,5033,4464],{"class":3033},[3020,5035,3957],{"class":3037},[3020,5037,4469],{"class":3371},[3020,5039,4472],{"class":3033},[3020,5041,3038],{"class":3037},[3020,5043,4944],{"class":3033},[3020,5045,5046,5048,5050,5052,5054,5056,5058,5060,5062],{"class":3022,"line":3066},[3020,5047,4949],{"class":3037},[3020,5049,4917],{"class":3046},[3020,5051,3083],{"class":3037},[3020,5053,4956],{"class":3033},[3020,5055,4815],{"class":3037},[3020,5057,4956],{"class":3033},[3020,5059,3038],{"class":3037},[3020,5061,4558],{"class":3033},[3020,5063,3089],{"class":3037},[3020,5065,5066,5068,5070,5072,5074,5076,5078,5080,5083,5086],{"class":3022,"line":3072},[3020,5067,4949],{"class":3037},[3020,5069,4917],{"class":3046},[3020,5071,3083],{"class":3037},[3020,5073,4956],{"class":3033},[3020,5075,4815],{"class":3037},[3020,5077,4956],{"class":3033},[3020,5079,3038],{"class":3037},[3020,5081,5082],{"class":3033},"LineItems",[3020,5084,5085],{"class":3037},")      ",[3020,5087,5088],{"class":3026},"// колекція!\n",[3020,5090,5091,5093,5095,5097,5099,5101,5103,5105,5107],{"class":3022,"line":3092},[3020,5092,4949],{"class":3037},[3020,5094,4917],{"class":3046},[3020,5096,3083],{"class":3037},[3020,5098,4956],{"class":3033},[3020,5100,4815],{"class":3037},[3020,5102,4956],{"class":3033},[3020,5104,3038],{"class":3037},[3020,5106,5082],{"class":3033},[3020,5108,3089],{"class":3037},[3020,5110,5111,5114,5117,5119,5122,5124,5126,5128,5131],{"class":3022,"line":3104},[3020,5112,5113],{"class":3037},"        .",[3020,5115,5116],{"class":3046},"ThenInclude",[3020,5118,3083],{"class":3037},[3020,5120,5121],{"class":3033},"li",[3020,5123,4815],{"class":3037},[3020,5125,5121],{"class":3033},[3020,5127,3038],{"class":3037},[3020,5129,5130],{"class":3033},"Product",[3020,5132,3089],{"class":3037},[3020,5134,5135,5137,5139],{"class":3022,"line":3121},[3020,5136,4949],{"class":3037},[3020,5138,4482],{"class":3046},[3020,5140,4892],{"class":3037},[3020,5142,5143],{"class":3022,"line":3138},[3020,5144,3494],{"emptyLinePlaceholder":3493},[3020,5146,5147],{"class":3022,"line":3152},[3020,5148,5149],{"class":3026},"// SQL: ORDER JOIN LINE_ITEMS × JOIN PRODUCTS\n",[3020,5151,5152],{"class":3022,"line":3158},[3020,5153,5154],{"class":3026},"// Order з 100 позиціями × 3 JOIN = 300 рядків замість 1!\n",[3020,5156,5157],{"class":3022,"line":3172},[3020,5158,5159],{"class":3026},"// Order з 1000 таблиць = надсилає гігабайти даних\n",[2965,5161,5162,5163,5166],{},"При Order з 50 OrderLineItems і 50 Products — JOIN поверне ",[3017,5164,5165],{},"50 × 50 = 2500"," рядків замість 50. EF Core де-дублює їх у пам'яті, але дані вже передані мережею.",[3010,5168,5170],{"className":4617,"code":5169,"language":4619,"meta":3015,"style":3015},"-- Приблизний SQL при подвійному Include колекцій:\nSELECT o.*, c.*, li.*, p.*\nFROM Orders o\nLEFT JOIN Customers c ON c.Id = o.CustomerId\nLEFT JOIN OrderLineItems li ON li.OrderId = o.Id    -- множить рядки!\nLEFT JOIN Products p ON p.Id = li.ProductId         -- ще раз множить!\n-- З 1 замовленням з 10 позиціями → 10 рядків\n-- З 100 замовленнями × 10 позицій → 1000 рядків\n",[3017,5171,5172,5177,5184,5191,5205,5220,5235,5240],{"__ignoreMap":3015},[3020,5173,5174],{"class":3022,"line":3023},[3020,5175,5176],{"class":3026},"-- Приблизний SQL при подвійному Include колекцій:\n",[3020,5178,5179,5181],{"class":3022,"line":3030},[3020,5180,4631],{"class":3371},[3020,5182,5183],{"class":3037}," o.*, c.*, li.*, p.*\n",[3020,5185,5186,5188],{"class":3022,"line":3066},[3020,5187,4639],{"class":3371},[3020,5189,5190],{"class":3037}," Orders o\n",[3020,5192,5193,5196,5199,5202],{"class":3022,"line":3072},[3020,5194,5195],{"class":3371},"LEFT JOIN",[3020,5197,5198],{"class":3037}," Customers c ",[3020,5200,5201],{"class":3371},"ON",[3020,5203,5204],{"class":3037}," c.Id = o.CustomerId\n",[3020,5206,5207,5209,5212,5214,5217],{"class":3022,"line":3092},[3020,5208,5195],{"class":3371},[3020,5210,5211],{"class":3037}," OrderLineItems li ",[3020,5213,5201],{"class":3371},[3020,5215,5216],{"class":3037}," li.OrderId = o.Id    ",[3020,5218,5219],{"class":3026},"-- множить рядки!\n",[3020,5221,5222,5224,5227,5229,5232],{"class":3022,"line":3104},[3020,5223,5195],{"class":3371},[3020,5225,5226],{"class":3037}," Products p ",[3020,5228,5201],{"class":3371},[3020,5230,5231],{"class":3037}," p.Id = li.ProductId         ",[3020,5233,5234],{"class":3026},"-- ще раз множить!\n",[3020,5236,5237],{"class":3022,"line":3121},[3020,5238,5239],{"class":3026},"-- З 1 замовленням з 10 позиціями → 10 рядків\n",[3020,5241,5242],{"class":3022,"line":3138},[3020,5243,5244],{"class":3026},"-- З 100 замовленнями × 10 позицій → 1000 рядків\n",[3005,5246,5248],{"id":5247},"крок-2-assplitquery-рішення-cartesian-explosion","Крок 2: AsSplitQuery — рішення Cartesian Explosion",[2965,5250,5251,5252,5255,5256,3712],{},"EF Core 5+ вводить ",[3017,5253,5254],{},"AsSplitQuery()"," — стратегія що виконує ",[2969,5257,5258],{},"окремий SQL для кожного Include",[3010,5260,5262],{"className":3012,"code":5261,"language":3014,"meta":3015,"style":3015},"// ✅ Split Query: окремий SELECT для кожної колекції\nvar orders = await context.Orders\n    .Include(o => o.Customer)\n    .Include(o => o.LineItems)\n        .ThenInclude(li => li.Product)\n    .AsSplitQuery()           // ← виконати окремі запити\n    .ToListAsync();\n\n// SQL що виконується (3 окремих запити):\n// Запит 1:\n// SELECT o.*, c.*\n// FROM Orders o LEFT JOIN Customers c ON c.Id = o.CustomerId\n\n// Запит 2:\n// SELECT li.*\n// FROM OrderLineItems li\n// WHERE li.OrderId IN (1, 2, 3, ...)  ← ID з першого запиту\n\n// Запит 3:\n// SELECT p.*\n// FROM Products p\n// WHERE p.Id IN (...)\n",[3017,5263,5264,5269,5285,5305,5325,5345,5358,5366,5370,5375,5380,5385,5390,5394,5399,5404,5409,5414,5418,5423,5428,5433],{"__ignoreMap":3015},[3020,5265,5266],{"class":3022,"line":3023},[3020,5267,5268],{"class":3026},"// ✅ Split Query: окремий SELECT для кожної колекції\n",[3020,5270,5271,5273,5275,5277,5279,5281,5283],{"class":3022,"line":3030},[3020,5272,4461],{"class":3371},[3020,5274,4464],{"class":3033},[3020,5276,3957],{"class":3037},[3020,5278,4469],{"class":3371},[3020,5280,4472],{"class":3033},[3020,5282,3038],{"class":3037},[3020,5284,4944],{"class":3033},[3020,5286,5287,5289,5291,5293,5295,5297,5299,5301,5303],{"class":3022,"line":3066},[3020,5288,4949],{"class":3037},[3020,5290,4917],{"class":3046},[3020,5292,3083],{"class":3037},[3020,5294,4956],{"class":3033},[3020,5296,4815],{"class":3037},[3020,5298,4956],{"class":3033},[3020,5300,3038],{"class":3037},[3020,5302,4558],{"class":3033},[3020,5304,3089],{"class":3037},[3020,5306,5307,5309,5311,5313,5315,5317,5319,5321,5323],{"class":3022,"line":3072},[3020,5308,4949],{"class":3037},[3020,5310,4917],{"class":3046},[3020,5312,3083],{"class":3037},[3020,5314,4956],{"class":3033},[3020,5316,4815],{"class":3037},[3020,5318,4956],{"class":3033},[3020,5320,3038],{"class":3037},[3020,5322,5082],{"class":3033},[3020,5324,3089],{"class":3037},[3020,5326,5327,5329,5331,5333,5335,5337,5339,5341,5343],{"class":3022,"line":3092},[3020,5328,5113],{"class":3037},[3020,5330,5116],{"class":3046},[3020,5332,3083],{"class":3037},[3020,5334,5121],{"class":3033},[3020,5336,4815],{"class":3037},[3020,5338,5121],{"class":3033},[3020,5340,3038],{"class":3037},[3020,5342,5130],{"class":3033},[3020,5344,3089],{"class":3037},[3020,5346,5347,5349,5352,5355],{"class":3022,"line":3104},[3020,5348,4949],{"class":3037},[3020,5350,5351],{"class":3046},"AsSplitQuery",[3020,5353,5354],{"class":3037},"()           ",[3020,5356,5357],{"class":3026},"// ← виконати окремі запити\n",[3020,5359,5360,5362,5364],{"class":3022,"line":3121},[3020,5361,4949],{"class":3037},[3020,5363,4482],{"class":3046},[3020,5365,4892],{"class":3037},[3020,5367,5368],{"class":3022,"line":3138},[3020,5369,3494],{"emptyLinePlaceholder":3493},[3020,5371,5372],{"class":3022,"line":3152},[3020,5373,5374],{"class":3026},"// SQL що виконується (3 окремих запити):\n",[3020,5376,5377],{"class":3022,"line":3158},[3020,5378,5379],{"class":3026},"// Запит 1:\n",[3020,5381,5382],{"class":3022,"line":3172},[3020,5383,5384],{"class":3026},"// SELECT o.*, c.*\n",[3020,5386,5387],{"class":3022,"line":3186},[3020,5388,5389],{"class":3026},"// FROM Orders o LEFT JOIN Customers c ON c.Id = o.CustomerId\n",[3020,5391,5392],{"class":3022,"line":3517},[3020,5393,3494],{"emptyLinePlaceholder":3493},[3020,5395,5396],{"class":3022,"line":3530},[3020,5397,5398],{"class":3026},"// Запит 2:\n",[3020,5400,5401],{"class":3022,"line":3536},[3020,5402,5403],{"class":3026},"// SELECT li.*\n",[3020,5405,5406],{"class":3022,"line":3541},[3020,5407,5408],{"class":3026},"// FROM OrderLineItems li\n",[3020,5410,5411],{"class":3022,"line":3572},[3020,5412,5413],{"class":3026},"// WHERE li.OrderId IN (1, 2, 3, ...)  ← ID з першого запиту\n",[3020,5415,5416],{"class":3022,"line":3577},[3020,5417,3494],{"emptyLinePlaceholder":3493},[3020,5419,5420],{"class":3022,"line":3606},[3020,5421,5422],{"class":3026},"// Запит 3:\n",[3020,5424,5425],{"class":3022,"line":3611},[3020,5426,5427],{"class":3026},"// SELECT p.*\n",[3020,5429,5430],{"class":3022,"line":3617},[3020,5431,5432],{"class":3026},"// FROM Products p\n",[3020,5434,5435],{"class":3022,"line":3647},[3020,5436,5437],{"class":3026},"// WHERE p.Id IN (...)\n",[3005,5439,5441],{"id":5440},"querysplittingbehavior-глобальне-налаштування","QuerySplittingBehavior: глобальне налаштування",[2965,5443,5444,5445,5447],{},"Замість ",[3017,5446,5254],{}," на кожному запиті — налаштувати глобально:",[3010,5449,5451],{"className":3012,"code":5450,"language":3014,"meta":3015,"style":3015},"builder.Services.AddDbContext\u003CAppDbContext>(options =>\n    options.UseSqlServer(connectionString, sqlOptions =>\n        sqlOptions.UseQuerySplittingBehavior(QuerySplittingBehavior.SplitQuery)));\n\n// Тепер всі Include автоматично використовують Split Query\n// Для конкретного запиту можна перевизначити:\nvar result = await context.Orders\n    .Include(o => o.Customer)\n    .AsSingleQuery()    // ← для цього конкретного запиту — назад до JOIN\n    .ToListAsync();\n",[3017,5452,5453,5475,5494,5517,5521,5526,5531,5547,5567,5580],{"__ignoreMap":3015},[3020,5454,5455,5457,5459,5461,5463,5465,5467,5469,5471,5473],{"class":3022,"line":3023},[3020,5456,3034],{"class":3033},[3020,5458,3038],{"class":3037},[3020,5460,3041],{"class":3033},[3020,5462,3038],{"class":3037},[3020,5464,3047],{"class":3046},[3020,5466,3050],{"class":3037},[3020,5468,3054],{"class":3053},[3020,5470,3057],{"class":3037},[3020,5472,3060],{"class":3033},[3020,5474,3063],{"class":3037},[3020,5476,5477,5479,5481,5483,5485,5487,5489,5492],{"class":3022,"line":3030},[3020,5478,3075],{"class":3033},[3020,5480,3038],{"class":3037},[3020,5482,3080],{"class":3046},[3020,5484,3083],{"class":3037},[3020,5486,3086],{"class":3033},[3020,5488,3289],{"class":3037},[3020,5490,5491],{"class":3033},"sqlOptions",[3020,5493,3063],{"class":3037},[3020,5495,5496,5499,5501,5504,5506,5509,5511,5514],{"class":3022,"line":3066},[3020,5497,5498],{"class":3033},"        sqlOptions",[3020,5500,3038],{"class":3037},[3020,5502,5503],{"class":3046},"UseQuerySplittingBehavior",[3020,5505,3083],{"class":3037},[3020,5507,5508],{"class":3033},"QuerySplittingBehavior",[3020,5510,3038],{"class":3037},[3020,5512,5513],{"class":3033},"SplitQuery",[3020,5515,5516],{"class":3037},")));\n",[3020,5518,5519],{"class":3022,"line":3072},[3020,5520,3494],{"emptyLinePlaceholder":3493},[3020,5522,5523],{"class":3022,"line":3092},[3020,5524,5525],{"class":3026},"// Тепер всі Include автоматично використовують Split Query\n",[3020,5527,5528],{"class":3022,"line":3104},[3020,5529,5530],{"class":3026},"// Для конкретного запиту можна перевизначити:\n",[3020,5532,5533,5535,5537,5539,5541,5543,5545],{"class":3022,"line":3121},[3020,5534,4461],{"class":3371},[3020,5536,4060],{"class":3033},[3020,5538,3957],{"class":3037},[3020,5540,4469],{"class":3371},[3020,5542,4472],{"class":3033},[3020,5544,3038],{"class":3037},[3020,5546,4944],{"class":3033},[3020,5548,5549,5551,5553,5555,5557,5559,5561,5563,5565],{"class":3022,"line":3138},[3020,5550,4949],{"class":3037},[3020,5552,4917],{"class":3046},[3020,5554,3083],{"class":3037},[3020,5556,4956],{"class":3033},[3020,5558,4815],{"class":3037},[3020,5560,4956],{"class":3033},[3020,5562,3038],{"class":3037},[3020,5564,4558],{"class":3033},[3020,5566,3089],{"class":3037},[3020,5568,5569,5571,5574,5577],{"class":3022,"line":3152},[3020,5570,4949],{"class":3037},[3020,5572,5573],{"class":3046},"AsSingleQuery",[3020,5575,5576],{"class":3037},"()    ",[3020,5578,5579],{"class":3026},"// ← для цього конкретного запиту — назад до JOIN\n",[3020,5581,5582,5584,5586],{"class":3022,"line":3158},[3020,5583,4949],{"class":3037},[3020,5585,4482],{"class":3046},[3020,5587,4892],{"class":3037},[3005,5589,5591],{"id":5590},"порівняльна-таблиця-стратегій","Порівняльна таблиця стратегій",[5593,5594,5595,5613],"table",{},[5596,5597,5598],"thead",{},[5599,5600,5601,5605,5607,5610],"tr",{},[5602,5603,5604],"th",{},"Стратегія",[5602,5606,2412],{},[5602,5608,5609],{},"Проблема",[5602,5611,5612],{},"Рекомендовано",[5614,5615,5616,5631,5645,5658],"tbody",{},[5599,5617,5618,5622,5625,5628],{},[5619,5620,5621],"td",{},"N+1",[5619,5623,5624],{},"1 + N",[5619,5626,5627],{},"Тисячі запитів",[5619,5629,5630],{},"❌ Ніколи",[5599,5632,5633,5636,5639,5642],{},[5619,5634,5635],{},"SingleQuery (один JOIN)",[5619,5637,5638],{},"1",[5619,5640,5641],{},"Cartesian Explosion",[5619,5643,5644],{},"⚠️ Тільки для 1 рівня",[5599,5646,5647,5649,5652,5655],{},[5619,5648,5513],{},[5619,5650,5651],{},"2-N",[5619,5653,5654],{},"Окремі транзакції",[5619,5656,5657],{},"✅ Для множинних Include",[5599,5659,5660,5663,5665,5668],{},[5619,5661,5662],{},"Projection (Select)",[5619,5664,5638],{},[5619,5666,5667],{},"—",[5619,5669,5670],{},"✅ Завжди краще",[2991,5672],{},[2960,5674,5676],{"id":5675},"projection-select-тільки-те-що-потрібно","Projection: Select тільки те що потрібно",[2965,5678,5679],{},"Projection — це найефективніша техніка оптимізації EF Core запитів. Замість завантаження повного entity з усіма стовпцями — вибирати лише потрібні поля у анонімний об'єкт або DTO.",[3005,5681,5683],{"id":5682},"чому-projection-краще-за-include","Чому projection краще за Include",[3010,5685,5687],{"className":3012,"code":5686,"language":3014,"meta":3015,"style":3015},"// ❌ Include: завантажує ВСІ поля Customer (включаючи хеш пароля, адресу тощо)\nvar orders = await context.Orders\n    .Include(o => o.Customer)     // SELECT *.* with JOIN\n    .ToListAsync();\n\n// ✅ Projection: лише те що реально потрібне\nvar orderDtos = await context.Orders\n    .Select(o => new OrderListDto\n    {\n        Id           = o.Id,\n        TotalAmount  = o.TotalAmount,\n        CustomerName = o.Customer.Name,   // лише Name, без решти полів Customer!\n        PlacedAt     = o.PlacedAt,\n        Status       = o.Status\n    })\n    .ToListAsync();\n\n// SQL що генерується (мінімально необхідний):\n// SELECT o.Id, o.TotalAmount, c.Name, o.PlacedAt, o.Status\n// FROM Orders o\n// LEFT JOIN Customers c ON c.Id = o.CustomerId\n// (Без зайвих полів Customer!)\n",[3017,5688,5689,5694,5710,5733,5741,5745,5750,5767,5784,5788,5804,5821,5844,5861,5876,5881,5889,5893,5898,5903,5907,5911],{"__ignoreMap":3015},[3020,5690,5691],{"class":3022,"line":3023},[3020,5692,5693],{"class":3026},"// ❌ Include: завантажує ВСІ поля Customer (включаючи хеш пароля, адресу тощо)\n",[3020,5695,5696,5698,5700,5702,5704,5706,5708],{"class":3022,"line":3030},[3020,5697,4461],{"class":3371},[3020,5699,4464],{"class":3033},[3020,5701,3957],{"class":3037},[3020,5703,4469],{"class":3371},[3020,5705,4472],{"class":3033},[3020,5707,3038],{"class":3037},[3020,5709,4944],{"class":3033},[3020,5711,5712,5714,5716,5718,5720,5722,5724,5726,5728,5730],{"class":3022,"line":3066},[3020,5713,4949],{"class":3037},[3020,5715,4917],{"class":3046},[3020,5717,3083],{"class":3037},[3020,5719,4956],{"class":3033},[3020,5721,4815],{"class":3037},[3020,5723,4956],{"class":3033},[3020,5725,3038],{"class":3037},[3020,5727,4558],{"class":3033},[3020,5729,4967],{"class":3037},[3020,5731,5732],{"class":3026},"// SELECT *.* with JOIN\n",[3020,5734,5735,5737,5739],{"class":3022,"line":3072},[3020,5736,4949],{"class":3037},[3020,5738,4482],{"class":3046},[3020,5740,4892],{"class":3037},[3020,5742,5743],{"class":3022,"line":3092},[3020,5744,3494],{"emptyLinePlaceholder":3493},[3020,5746,5747],{"class":3022,"line":3104},[3020,5748,5749],{"class":3026},"// ✅ Projection: лише те що реально потрібне\n",[3020,5751,5752,5754,5757,5759,5761,5763,5765],{"class":3022,"line":3121},[3020,5753,4461],{"class":3371},[3020,5755,5756],{"class":3033}," orderDtos",[3020,5758,3957],{"class":3037},[3020,5760,4469],{"class":3371},[3020,5762,4472],{"class":3033},[3020,5764,3038],{"class":3037},[3020,5766,4944],{"class":3033},[3020,5768,5769,5771,5773,5775,5777,5779,5781],{"class":3022,"line":3138},[3020,5770,4949],{"class":3037},[3020,5772,4807],{"class":3046},[3020,5774,3083],{"class":3037},[3020,5776,4956],{"class":3033},[3020,5778,4815],{"class":3037},[3020,5780,3472],{"class":3371},[3020,5782,5783],{"class":3053}," OrderListDto\n",[3020,5785,5786],{"class":3022,"line":3152},[3020,5787,3420],{"class":3037},[3020,5789,5790,5793,5796,5798,5800,5802],{"class":3022,"line":3158},[3020,5791,5792],{"class":3033},"        Id",[3020,5794,5795],{"class":3037},"           = ",[3020,5797,4956],{"class":3033},[3020,5799,3038],{"class":3037},[3020,5801,4544],{"class":3033},[3020,5803,4042],{"class":3037},[3020,5805,5806,5809,5812,5814,5816,5819],{"class":3022,"line":3172},[3020,5807,5808],{"class":3033},"        TotalAmount",[3020,5810,5811],{"class":3037},"  = ",[3020,5813,4956],{"class":3033},[3020,5815,3038],{"class":3037},[3020,5817,5818],{"class":3033},"TotalAmount",[3020,5820,4042],{"class":3037},[3020,5822,5823,5826,5828,5830,5832,5834,5836,5838,5841],{"class":3022,"line":3186},[3020,5824,5825],{"class":3033},"        CustomerName",[3020,5827,3957],{"class":3037},[3020,5829,4956],{"class":3033},[3020,5831,3038],{"class":3037},[3020,5833,4558],{"class":3033},[3020,5835,3038],{"class":3037},[3020,5837,3436],{"class":3033},[3020,5839,5840],{"class":3037},",   ",[3020,5842,5843],{"class":3026},"// лише Name, без решти полів Customer!\n",[3020,5845,5846,5849,5852,5854,5856,5859],{"class":3022,"line":3517},[3020,5847,5848],{"class":3033},"        PlacedAt",[3020,5850,5851],{"class":3037},"     = ",[3020,5853,4956],{"class":3033},[3020,5855,3038],{"class":3037},[3020,5857,5858],{"class":3033},"PlacedAt",[3020,5860,4042],{"class":3037},[3020,5862,5863,5866,5869,5871,5873],{"class":3022,"line":3530},[3020,5864,5865],{"class":3033},"        Status",[3020,5867,5868],{"class":3037},"       = ",[3020,5870,4956],{"class":3033},[3020,5872,3038],{"class":3037},[3020,5874,5875],{"class":3033},"Status\n",[3020,5877,5878],{"class":3022,"line":3536},[3020,5879,5880],{"class":3037},"    })\n",[3020,5882,5883,5885,5887],{"class":3022,"line":3541},[3020,5884,4949],{"class":3037},[3020,5886,4482],{"class":3046},[3020,5888,4892],{"class":3037},[3020,5890,5891],{"class":3022,"line":3572},[3020,5892,3494],{"emptyLinePlaceholder":3493},[3020,5894,5895],{"class":3022,"line":3577},[3020,5896,5897],{"class":3026},"// SQL що генерується (мінімально необхідний):\n",[3020,5899,5900],{"class":3022,"line":3606},[3020,5901,5902],{"class":3026},"// SELECT o.Id, o.TotalAmount, c.Name, o.PlacedAt, o.Status\n",[3020,5904,5905],{"class":3022,"line":3611},[3020,5906,5002],{"class":3026},[3020,5908,5909],{"class":3022,"line":3617},[3020,5910,5007],{"class":3026},[3020,5912,5913],{"class":3022,"line":3647},[3020,5914,5915],{"class":3026},"// (Без зайвих полів Customer!)\n",[3005,5917,5919],{"id":5918},"вкладені-обєкти-у-projection","Вкладені об'єкти у projection",[3010,5921,5923],{"className":3012,"code":5922,"language":3014,"meta":3015,"style":3015},"var orders = await context.Orders\n    .Select(o => new OrderDetailDto\n    {\n        Id     = o.Id,\n        Status = o.Status,\n        Customer = new CustomerSummaryDto\n        {\n            Name  = o.Customer.Name,\n            Email = o.Customer.Email\n        },\n        // Агрегація LineItems без завантаження кожного:\n        ItemCount   = o.LineItems.Count(),\n        TotalAmount = o.LineItems.Sum(li => li.Quantity * li.UnitPrice),\n        // Вибірка лише перших 3 позицій:\n        PreviewItems = o.LineItems\n            .OrderBy(li => li.Id)\n            .Take(3)\n            .Select(li => new LineItemPreviewDto\n            {\n                ProductName = li.Product.Name,\n                Quantity    = li.Quantity\n            })\n            .ToList()\n    })\n    .ToListAsync();\n\n// EF Core транслює ALL це в один оптимальний SQL з потрібними JOIN і GROUP BY!\n",[3017,5924,5925,5941,5958,5962,5976,5991,6003,6007,6026,6044,6049,6054,6075,6118,6123,6137,6159,6173,6190,6195,6214,6229,6234,6242,6246,6254,6258],{"__ignoreMap":3015},[3020,5926,5927,5929,5931,5933,5935,5937,5939],{"class":3022,"line":3023},[3020,5928,4461],{"class":3371},[3020,5930,4464],{"class":3033},[3020,5932,3957],{"class":3037},[3020,5934,4469],{"class":3371},[3020,5936,4472],{"class":3033},[3020,5938,3038],{"class":3037},[3020,5940,4944],{"class":3033},[3020,5942,5943,5945,5947,5949,5951,5953,5955],{"class":3022,"line":3030},[3020,5944,4949],{"class":3037},[3020,5946,4807],{"class":3046},[3020,5948,3083],{"class":3037},[3020,5950,4956],{"class":3033},[3020,5952,4815],{"class":3037},[3020,5954,3472],{"class":3371},[3020,5956,5957],{"class":3053}," OrderDetailDto\n",[3020,5959,5960],{"class":3022,"line":3066},[3020,5961,3420],{"class":3037},[3020,5963,5964,5966,5968,5970,5972,5974],{"class":3022,"line":3072},[3020,5965,5792],{"class":3033},[3020,5967,5851],{"class":3037},[3020,5969,4956],{"class":3033},[3020,5971,3038],{"class":3037},[3020,5973,4544],{"class":3033},[3020,5975,4042],{"class":3037},[3020,5977,5978,5980,5982,5984,5986,5989],{"class":3022,"line":3092},[3020,5979,5865],{"class":3033},[3020,5981,3957],{"class":3037},[3020,5983,4956],{"class":3033},[3020,5985,3038],{"class":3037},[3020,5987,5988],{"class":3033},"Status",[3020,5990,4042],{"class":3037},[3020,5992,5993,5996,5998,6000],{"class":3022,"line":3104},[3020,5994,5995],{"class":3033},"        Customer",[3020,5997,3957],{"class":3037},[3020,5999,3472],{"class":3371},[3020,6001,6002],{"class":3053}," CustomerSummaryDto\n",[3020,6004,6005],{"class":3022,"line":3121},[3020,6006,3457],{"class":3037},[3020,6008,6009,6012,6014,6016,6018,6020,6022,6024],{"class":3022,"line":3138},[3020,6010,6011],{"class":3033},"            Name",[3020,6013,5811],{"class":3037},[3020,6015,4956],{"class":3033},[3020,6017,3038],{"class":3037},[3020,6019,4558],{"class":3033},[3020,6021,3038],{"class":3037},[3020,6023,3436],{"class":3033},[3020,6025,4042],{"class":3037},[3020,6027,6028,6031,6033,6035,6037,6039,6041],{"class":3022,"line":3152},[3020,6029,6030],{"class":3033},"            Email",[3020,6032,3957],{"class":3037},[3020,6034,4956],{"class":3033},[3020,6036,3038],{"class":3037},[3020,6038,4558],{"class":3033},[3020,6040,3038],{"class":3037},[3020,6042,6043],{"class":3033},"Email\n",[3020,6045,6046],{"class":3022,"line":3158},[3020,6047,6048],{"class":3037},"        },\n",[3020,6050,6051],{"class":3022,"line":3172},[3020,6052,6053],{"class":3026},"        // Агрегація LineItems без завантаження кожного:\n",[3020,6055,6056,6059,6062,6064,6066,6068,6070,6072],{"class":3022,"line":3186},[3020,6057,6058],{"class":3033},"        ItemCount",[3020,6060,6061],{"class":3037},"   = ",[3020,6063,4956],{"class":3033},[3020,6065,3038],{"class":3037},[3020,6067,5082],{"class":3033},[3020,6069,3038],{"class":3037},[3020,6071,4858],{"class":3046},[3020,6073,6074],{"class":3037},"(),\n",[3020,6076,6077,6079,6081,6083,6085,6087,6089,6092,6094,6096,6098,6100,6102,6105,6108,6110,6112,6115],{"class":3022,"line":3517},[3020,6078,5808],{"class":3033},[3020,6080,3957],{"class":3037},[3020,6082,4956],{"class":3033},[3020,6084,3038],{"class":3037},[3020,6086,5082],{"class":3033},[3020,6088,3038],{"class":3037},[3020,6090,6091],{"class":3046},"Sum",[3020,6093,3083],{"class":3037},[3020,6095,5121],{"class":3033},[3020,6097,4815],{"class":3037},[3020,6099,5121],{"class":3033},[3020,6101,3038],{"class":3037},[3020,6103,6104],{"class":3033},"Quantity",[3020,6106,6107],{"class":3037}," * ",[3020,6109,5121],{"class":3033},[3020,6111,3038],{"class":3037},[3020,6113,6114],{"class":3033},"UnitPrice",[3020,6116,6117],{"class":3037},"),\n",[3020,6119,6120],{"class":3022,"line":3530},[3020,6121,6122],{"class":3026},"        // Вибірка лише перших 3 позицій:\n",[3020,6124,6125,6128,6130,6132,6134],{"class":3022,"line":3536},[3020,6126,6127],{"class":3033},"        PreviewItems",[3020,6129,3957],{"class":3037},[3020,6131,4956],{"class":3033},[3020,6133,3038],{"class":3037},[3020,6135,6136],{"class":3033},"LineItems\n",[3020,6138,6139,6142,6145,6147,6149,6151,6153,6155,6157],{"class":3022,"line":3541},[3020,6140,6141],{"class":3037},"            .",[3020,6143,6144],{"class":3046},"OrderBy",[3020,6146,3083],{"class":3037},[3020,6148,5121],{"class":3033},[3020,6150,4815],{"class":3037},[3020,6152,5121],{"class":3033},[3020,6154,3038],{"class":3037},[3020,6156,4544],{"class":3033},[3020,6158,3089],{"class":3037},[3020,6160,6161,6163,6166,6168,6171],{"class":3022,"line":3572},[3020,6162,6141],{"class":3037},[3020,6164,6165],{"class":3046},"Take",[3020,6167,3083],{"class":3037},[3020,6169,6170],{"class":3970},"3",[3020,6172,3089],{"class":3037},[3020,6174,6175,6177,6179,6181,6183,6185,6187],{"class":3022,"line":3577},[3020,6176,6141],{"class":3037},[3020,6178,4807],{"class":3046},[3020,6180,3083],{"class":3037},[3020,6182,5121],{"class":3033},[3020,6184,4815],{"class":3037},[3020,6186,3472],{"class":3371},[3020,6188,6189],{"class":3053}," LineItemPreviewDto\n",[3020,6191,6192],{"class":3022,"line":3606},[3020,6193,6194],{"class":3037},"            {\n",[3020,6196,6197,6200,6202,6204,6206,6208,6210,6212],{"class":3022,"line":3611},[3020,6198,6199],{"class":3033},"                ProductName",[3020,6201,3957],{"class":3037},[3020,6203,5121],{"class":3033},[3020,6205,3038],{"class":3037},[3020,6207,5130],{"class":3033},[3020,6209,3038],{"class":3037},[3020,6211,3436],{"class":3033},[3020,6213,4042],{"class":3037},[3020,6215,6216,6219,6222,6224,6226],{"class":3022,"line":3617},[3020,6217,6218],{"class":3033},"                Quantity",[3020,6220,6221],{"class":3037},"    = ",[3020,6223,5121],{"class":3033},[3020,6225,3038],{"class":3037},[3020,6227,6228],{"class":3033},"Quantity\n",[3020,6230,6231],{"class":3022,"line":3647},[3020,6232,6233],{"class":3037},"            })\n",[3020,6235,6236,6238,6240],{"class":3022,"line":3652},[3020,6237,6141],{"class":3037},[3020,6239,4889],{"class":3046},[3020,6241,3272],{"class":3037},[3020,6243,6244],{"class":3022,"line":3680},[3020,6245,5880],{"class":3037},[3020,6247,6248,6250,6252],{"class":3022,"line":3745},[3020,6249,4949],{"class":3037},[3020,6251,4482],{"class":3046},[3020,6253,4892],{"class":3037},[3020,6255,6256],{"class":3022,"line":3750},[3020,6257,3494],{"emptyLinePlaceholder":3493},[3020,6259,6260],{"class":3022,"line":3755},[3020,6261,6262],{"class":3026},"// EF Core транслює ALL це в один оптимальний SQL з потрібними JOIN і GROUP BY!\n",[3005,6264,6266],{"id":6265},"projection-і-asnotracking","Projection і AsNoTracking",[2965,6268,6269,6270,6278],{},"Важлива деталь: ",[2969,6271,6272,6274,6275],{},[3017,6273,4807],{}," automatic implies ",[3017,6276,6277],{},"AsNoTracking"," — результат projection містить анонімні об'єкти або DTO, не EF entity. Change Tracker їх не відстежує. Але якщо ви проєктуєте у entity (власний тип), трекінг все одно відбувається.",[3010,6280,6282],{"className":3012,"code":6281,"language":3014,"meta":3015,"style":3015},"// Без трекінгу (efficient):\nvar dtos = await context.Products\n    .Select(p => new ProductDto { Id = p.Id, Name = p.Name })\n    .ToListAsync();   // Change Tracker порожній!\n\n// З трекінгом (неефективно для read-only):\nvar products = await context.Products\n    .Select(p => new Product { Id = p.Id, Name = p.Name })  // ← entity type!\n    .ToListAsync();   // Change Tracker відстежує!  ← небажано\n",[3017,6283,6284,6289,6307,6352,6364,6368,6373,6390,6437],{"__ignoreMap":3015},[3020,6285,6286],{"class":3022,"line":3023},[3020,6287,6288],{"class":3026},"// Без трекінгу (efficient):\n",[3020,6290,6291,6293,6296,6298,6300,6302,6304],{"class":3022,"line":3030},[3020,6292,4461],{"class":3371},[3020,6294,6295],{"class":3033}," dtos",[3020,6297,3957],{"class":3037},[3020,6299,4469],{"class":3371},[3020,6301,4472],{"class":3033},[3020,6303,3038],{"class":3037},[3020,6305,6306],{"class":3033},"Products\n",[3020,6308,6309,6311,6313,6315,6317,6319,6321,6324,6327,6329,6331,6333,6335,6337,6339,6341,6343,6345,6347,6349],{"class":3022,"line":3066},[3020,6310,4949],{"class":3037},[3020,6312,4807],{"class":3046},[3020,6314,3083],{"class":3037},[3020,6316,2965],{"class":3033},[3020,6318,4815],{"class":3037},[3020,6320,3472],{"class":3371},[3020,6322,6323],{"class":3053}," ProductDto",[3020,6325,6326],{"class":3037}," { ",[3020,6328,4544],{"class":3033},[3020,6330,3957],{"class":3037},[3020,6332,2965],{"class":3033},[3020,6334,3038],{"class":3037},[3020,6336,4544],{"class":3033},[3020,6338,3289],{"class":3037},[3020,6340,3436],{"class":3033},[3020,6342,3957],{"class":3037},[3020,6344,2965],{"class":3033},[3020,6346,3038],{"class":3037},[3020,6348,3436],{"class":3033},[3020,6350,6351],{"class":3037}," })\n",[3020,6353,6354,6356,6358,6361],{"class":3022,"line":3072},[3020,6355,4949],{"class":3037},[3020,6357,4482],{"class":3046},[3020,6359,6360],{"class":3037},"();   ",[3020,6362,6363],{"class":3026},"// Change Tracker порожній!\n",[3020,6365,6366],{"class":3022,"line":3092},[3020,6367,3494],{"emptyLinePlaceholder":3493},[3020,6369,6370],{"class":3022,"line":3104},[3020,6371,6372],{"class":3026},"// З трекінгом (неефективно для read-only):\n",[3020,6374,6375,6377,6380,6382,6384,6386,6388],{"class":3022,"line":3121},[3020,6376,4461],{"class":3371},[3020,6378,6379],{"class":3033}," products",[3020,6381,3957],{"class":3037},[3020,6383,4469],{"class":3371},[3020,6385,4472],{"class":3033},[3020,6387,3038],{"class":3037},[3020,6389,6306],{"class":3033},[3020,6391,6392,6394,6396,6398,6400,6402,6404,6407,6409,6411,6413,6415,6417,6419,6421,6423,6425,6427,6429,6431,6434],{"class":3022,"line":3138},[3020,6393,4949],{"class":3037},[3020,6395,4807],{"class":3046},[3020,6397,3083],{"class":3037},[3020,6399,2965],{"class":3033},[3020,6401,4815],{"class":3037},[3020,6403,3472],{"class":3371},[3020,6405,6406],{"class":3053}," Product",[3020,6408,6326],{"class":3037},[3020,6410,4544],{"class":3033},[3020,6412,3957],{"class":3037},[3020,6414,2965],{"class":3033},[3020,6416,3038],{"class":3037},[3020,6418,4544],{"class":3033},[3020,6420,3289],{"class":3037},[3020,6422,3436],{"class":3033},[3020,6424,3957],{"class":3037},[3020,6426,2965],{"class":3033},[3020,6428,3038],{"class":3037},[3020,6430,3436],{"class":3033},[3020,6432,6433],{"class":3037}," })  ",[3020,6435,6436],{"class":3026},"// ← entity type!\n",[3020,6438,6439,6441,6443,6445],{"class":3022,"line":3152},[3020,6440,4949],{"class":3037},[3020,6442,4482],{"class":3046},[3020,6444,6360],{"class":3037},[3020,6446,6447],{"class":3026},"// Change Tracker відстежує!  ← небажано\n",[2991,6449],{},[2960,6451,6453],{"id":6452},"asnotracking-відключення-change-tracker","AsNoTracking: відключення Change Tracker",[2965,6455,6456,6457,6460],{},"За замовчуванням EF Core відстежує всі завантажені entity — зберігає оригінальні значення, перевіряє зміни при ",[3017,6458,6459],{},"SaveChanges",". Це займає пам'ять і CPU.",[2965,6462,6463,6464,6467],{},"Для ",[2969,6465,6466],{},"read-only"," запитів (API відповіді, звіти, графіки) — Change Tracker марнує ресурси.",[3005,6469,6471],{"id":6470},"профіт-asnotracking-на-числах","Профіт AsNoTracking на числах",[3010,6473,6475],{"className":3012,"code":6474,"language":3014,"meta":3015,"style":3015},"// Benchmark результати (наближені, залежать від сценарію):\n// 1000 Products з Include(Category):\n//\n// WithTracking:    ~45ms,  ~12 MB RAM\n// AsNoTracking:   ~28ms,   ~4 MB RAM\n// Projection:      ~15ms,   ~2 MB RAM\n//\n// При 10,000 entity різниця ще суттєвіша.\n\n// ✅ Read-only запити: завжди AsNoTracking або Projection\nvar products = await context.Products\n    .AsNoTracking()\n    .Include(p => p.Category)\n    .Where(p => p.IsActive)\n    .ToListAsync();\n",[3017,6476,6477,6482,6487,6492,6497,6502,6507,6511,6516,6520,6525,6541,6549,6570,6592],{"__ignoreMap":3015},[3020,6478,6479],{"class":3022,"line":3023},[3020,6480,6481],{"class":3026},"// Benchmark результати (наближені, залежать від сценарію):\n",[3020,6483,6484],{"class":3022,"line":3030},[3020,6485,6486],{"class":3026},"// 1000 Products з Include(Category):\n",[3020,6488,6489],{"class":3022,"line":3066},[3020,6490,6491],{"class":3026},"//\n",[3020,6493,6494],{"class":3022,"line":3072},[3020,6495,6496],{"class":3026},"// WithTracking:    ~45ms,  ~12 MB RAM\n",[3020,6498,6499],{"class":3022,"line":3092},[3020,6500,6501],{"class":3026},"// AsNoTracking:   ~28ms,   ~4 MB RAM\n",[3020,6503,6504],{"class":3022,"line":3104},[3020,6505,6506],{"class":3026},"// Projection:      ~15ms,   ~2 MB RAM\n",[3020,6508,6509],{"class":3022,"line":3121},[3020,6510,6491],{"class":3026},[3020,6512,6513],{"class":3022,"line":3138},[3020,6514,6515],{"class":3026},"// При 10,000 entity різниця ще суттєвіша.\n",[3020,6517,6518],{"class":3022,"line":3152},[3020,6519,3494],{"emptyLinePlaceholder":3493},[3020,6521,6522],{"class":3022,"line":3158},[3020,6523,6524],{"class":3026},"// ✅ Read-only запити: завжди AsNoTracking або Projection\n",[3020,6526,6527,6529,6531,6533,6535,6537,6539],{"class":3022,"line":3172},[3020,6528,4461],{"class":3371},[3020,6530,6379],{"class":3033},[3020,6532,3957],{"class":3037},[3020,6534,4469],{"class":3371},[3020,6536,4472],{"class":3033},[3020,6538,3038],{"class":3037},[3020,6540,6306],{"class":3033},[3020,6542,6543,6545,6547],{"class":3022,"line":3186},[3020,6544,4949],{"class":3037},[3020,6546,6277],{"class":3046},[3020,6548,3272],{"class":3037},[3020,6550,6551,6553,6555,6557,6559,6561,6563,6565,6568],{"class":3022,"line":3517},[3020,6552,4949],{"class":3037},[3020,6554,4917],{"class":3046},[3020,6556,3083],{"class":3037},[3020,6558,2965],{"class":3033},[3020,6560,4815],{"class":3037},[3020,6562,2965],{"class":3033},[3020,6564,3038],{"class":3037},[3020,6566,6567],{"class":3033},"Category",[3020,6569,3089],{"class":3037},[3020,6571,6572,6574,6577,6579,6581,6583,6585,6587,6590],{"class":3022,"line":3530},[3020,6573,4949],{"class":3037},[3020,6575,6576],{"class":3046},"Where",[3020,6578,3083],{"class":3037},[3020,6580,2965],{"class":3033},[3020,6582,4815],{"class":3037},[3020,6584,2965],{"class":3033},[3020,6586,3038],{"class":3037},[3020,6588,6589],{"class":3033},"IsActive",[3020,6591,3089],{"class":3037},[3020,6593,6594,6596,6598],{"class":3022,"line":3536},[3020,6595,4949],{"class":3037},[3020,6597,4482],{"class":3046},[3020,6599,4892],{"class":3037},[3005,6601,6603],{"id":6602},"asnotrackingwithidentityresolution","AsNoTrackingWithIdentityResolution",[2965,6605,6606,6607,6609],{},"Є нюанс: ",[3017,6608,6277],{}," НЕ де-дублює об'єкти. Якщо 5 Products мають однаковий Category — у результаті буде 5 різних об'єктів Category (не один загальний):",[3010,6611,6613],{"className":3012,"code":6612,"language":3014,"meta":3015,"style":3015},"// AsNoTracking: 5 Products → 5 різних Category об'єктів у пам'яті (навіть якщо CategoryId однаковий)\nvar products = await context.Products\n    .AsNoTracking()\n    .Include(p => p.Category)\n    .ToListAsync();\n\n// products[0].Category != products[1].Category (різні об'єкти, але однаковий вміст)\n\n// AsNoTrackingWithIdentityResolution: де-дублює по Identity\nvar products = await context.Products\n    .AsNoTrackingWithIdentityResolution()\n    .Include(p => p.Category)\n    .ToListAsync();\n\n// products[0].Category == products[1].Category (той самий об'єкт якщо CategoryId однаковий)\n",[3017,6614,6615,6620,6636,6644,6664,6672,6676,6681,6685,6690,6706,6714,6734,6742,6746],{"__ignoreMap":3015},[3020,6616,6617],{"class":3022,"line":3023},[3020,6618,6619],{"class":3026},"// AsNoTracking: 5 Products → 5 різних Category об'єктів у пам'яті (навіть якщо CategoryId однаковий)\n",[3020,6621,6622,6624,6626,6628,6630,6632,6634],{"class":3022,"line":3030},[3020,6623,4461],{"class":3371},[3020,6625,6379],{"class":3033},[3020,6627,3957],{"class":3037},[3020,6629,4469],{"class":3371},[3020,6631,4472],{"class":3033},[3020,6633,3038],{"class":3037},[3020,6635,6306],{"class":3033},[3020,6637,6638,6640,6642],{"class":3022,"line":3066},[3020,6639,4949],{"class":3037},[3020,6641,6277],{"class":3046},[3020,6643,3272],{"class":3037},[3020,6645,6646,6648,6650,6652,6654,6656,6658,6660,6662],{"class":3022,"line":3072},[3020,6647,4949],{"class":3037},[3020,6649,4917],{"class":3046},[3020,6651,3083],{"class":3037},[3020,6653,2965],{"class":3033},[3020,6655,4815],{"class":3037},[3020,6657,2965],{"class":3033},[3020,6659,3038],{"class":3037},[3020,6661,6567],{"class":3033},[3020,6663,3089],{"class":3037},[3020,6665,6666,6668,6670],{"class":3022,"line":3092},[3020,6667,4949],{"class":3037},[3020,6669,4482],{"class":3046},[3020,6671,4892],{"class":3037},[3020,6673,6674],{"class":3022,"line":3104},[3020,6675,3494],{"emptyLinePlaceholder":3493},[3020,6677,6678],{"class":3022,"line":3121},[3020,6679,6680],{"class":3026},"// products[0].Category != products[1].Category (різні об'єкти, але однаковий вміст)\n",[3020,6682,6683],{"class":3022,"line":3138},[3020,6684,3494],{"emptyLinePlaceholder":3493},[3020,6686,6687],{"class":3022,"line":3152},[3020,6688,6689],{"class":3026},"// AsNoTrackingWithIdentityResolution: де-дублює по Identity\n",[3020,6691,6692,6694,6696,6698,6700,6702,6704],{"class":3022,"line":3158},[3020,6693,4461],{"class":3371},[3020,6695,6379],{"class":3033},[3020,6697,3957],{"class":3037},[3020,6699,4469],{"class":3371},[3020,6701,4472],{"class":3033},[3020,6703,3038],{"class":3037},[3020,6705,6306],{"class":3033},[3020,6707,6708,6710,6712],{"class":3022,"line":3172},[3020,6709,4949],{"class":3037},[3020,6711,6603],{"class":3046},[3020,6713,3272],{"class":3037},[3020,6715,6716,6718,6720,6722,6724,6726,6728,6730,6732],{"class":3022,"line":3186},[3020,6717,4949],{"class":3037},[3020,6719,4917],{"class":3046},[3020,6721,3083],{"class":3037},[3020,6723,2965],{"class":3033},[3020,6725,4815],{"class":3037},[3020,6727,2965],{"class":3033},[3020,6729,3038],{"class":3037},[3020,6731,6567],{"class":3033},[3020,6733,3089],{"class":3037},[3020,6735,6736,6738,6740],{"class":3022,"line":3517},[3020,6737,4949],{"class":3037},[3020,6739,4482],{"class":3046},[3020,6741,4892],{"class":3037},[3020,6743,6744],{"class":3022,"line":3530},[3020,6745,3494],{"emptyLinePlaceholder":3493},[3020,6747,6748],{"class":3022,"line":3536},[3020,6749,6750],{"class":3026},"// products[0].Category == products[1].Category (той самий об'єкт якщо CategoryId однаковий)\n",[3005,6752,6754],{"id":6753},"глобальний-notracking-для-всього-dbcontext","Глобальний NoTracking для всього DbContext",[3010,6756,6758],{"className":3012,"code":6757,"language":3014,"meta":3015,"style":3015},"// Налаштувати весь DbContext у read-only режим:\nbuilder.Services.AddDbContext\u003CReadDbContext>(options =>\n    options.UseSqlServer(replicaConnectionString)\n           .UseQueryTrackingBehavior(QueryTrackingBehavior.NoTracking));\n\n// Тоді для операцій запису — окремий WriteDbContext (article 25 CQRS pattern)\n",[3017,6759,6760,6765,6788,6803,6823,6827],{"__ignoreMap":3015},[3020,6761,6762],{"class":3022,"line":3023},[3020,6763,6764],{"class":3026},"// Налаштувати весь DbContext у read-only режим:\n",[3020,6766,6767,6769,6771,6773,6775,6777,6779,6782,6784,6786],{"class":3022,"line":3030},[3020,6768,3034],{"class":3033},[3020,6770,3038],{"class":3037},[3020,6772,3041],{"class":3033},[3020,6774,3038],{"class":3037},[3020,6776,3047],{"class":3046},[3020,6778,3050],{"class":3037},[3020,6780,6781],{"class":3053},"ReadDbContext",[3020,6783,3057],{"class":3037},[3020,6785,3060],{"class":3033},[3020,6787,3063],{"class":3037},[3020,6789,6790,6792,6794,6796,6798,6801],{"class":3022,"line":3066},[3020,6791,3075],{"class":3033},[3020,6793,3038],{"class":3037},[3020,6795,3080],{"class":3046},[3020,6797,3083],{"class":3037},[3020,6799,6800],{"class":3033},"replicaConnectionString",[3020,6802,3089],{"class":3037},[3020,6804,6805,6807,6810,6812,6815,6817,6820],{"class":3022,"line":3072},[3020,6806,3095],{"class":3037},[3020,6808,6809],{"class":3046},"UseQueryTrackingBehavior",[3020,6811,3083],{"class":3037},[3020,6813,6814],{"class":3033},"QueryTrackingBehavior",[3020,6816,3038],{"class":3037},[3020,6818,6819],{"class":3033},"NoTracking",[3020,6821,6822],{"class":3037},"));\n",[3020,6824,6825],{"class":3022,"line":3092},[3020,6826,3494],{"emptyLinePlaceholder":3493},[3020,6828,6829],{"class":3022,"line":3104},[3020,6830,6831],{"class":3026},"// Тоді для операцій запису — окремий WriteDbContext (article 25 CQRS pattern)\n",[2991,6833],{},[2960,6835,6837],{"id":6836},"count-vs-any-перевірка-існування","Count vs Any: перевірка існування",[2965,6839,6840,6841,6844,6845,6848],{},"Класична помилка: використання ",[3017,6842,6843],{},"Count() > 0"," замість ",[3017,6846,6847],{},"Any()"," для перевірки існування.",[3010,6850,6852],{"className":3012,"code":6851,"language":3014,"meta":3015,"style":3015},"// ❌ COUNT(*) завантажує кількість ВСІХ записів\nbool hasOrders = await context.Orders\n    .Where(o => o.CustomerId == customerId)\n    .Count() > 0;\n// SQL: SELECT COUNT(*) FROM Orders WHERE CustomerId = @customerId\n// БД сканує ВСІ записи і рахує їх!\n\n// ✅ EXISTS: зупиняється на першому знайденому записі\nbool hasOrders = await context.Orders\n    .Where(o => o.CustomerId == customerId)\n    .AnyAsync();\n// SQL: SELECT CASE WHEN EXISTS (\n//          SELECT 1 FROM Orders WHERE CustomerId = @customerId\n//      ) THEN 1 ELSE 0 END\n// БД зупиняється одразу після знаходження першого запису!\n\n// ❌ Також погано: FirstOrDefault() != null\nvar hasProduct = await context.Products\n    .Where(p => p.Name == \"Laptop\")\n    .FirstOrDefaultAsync() != null;\n// SQL: SELECT TOP 1 * FROM Products WHERE Name = 'Laptop'\n// Завантажує всі поля entity (хоча потрібно лише перевірити існування)\n\n// ✅ Any()\nvar hasProduct = await context.Products\n    .AnyAsync(p => p.Name == \"Laptop\");\n// SQL: EXISTS (SELECT 1 FROM Products WHERE Name = 'Laptop')\n",[3017,6853,6854,6859,6877,6903,6917,6922,6927,6931,6936,6952,6976,6985,6990,6995,7000,7005,7009,7014,7031,7056,7071,7076,7081,7085,7090,7106,7130],{"__ignoreMap":3015},[3020,6855,6856],{"class":3022,"line":3023},[3020,6857,6858],{"class":3026},"// ❌ COUNT(*) завантажує кількість ВСІХ записів\n",[3020,6860,6861,6864,6867,6869,6871,6873,6875],{"class":3022,"line":3030},[3020,6862,6863],{"class":3371},"bool",[3020,6865,6866],{"class":3033}," hasOrders",[3020,6868,3957],{"class":3037},[3020,6870,4469],{"class":3371},[3020,6872,4472],{"class":3033},[3020,6874,3038],{"class":3037},[3020,6876,4944],{"class":3033},[3020,6878,6879,6881,6883,6885,6887,6889,6891,6893,6896,6898,6901],{"class":3022,"line":3066},[3020,6880,4949],{"class":3037},[3020,6882,6576],{"class":3046},[3020,6884,3083],{"class":3037},[3020,6886,4956],{"class":3033},[3020,6888,4815],{"class":3037},[3020,6890,4956],{"class":3033},[3020,6892,3038],{"class":3037},[3020,6894,6895],{"class":3033},"CustomerId",[3020,6897,3439],{"class":3037},[3020,6899,6900],{"class":3033},"customerId",[3020,6902,3089],{"class":3037},[3020,6904,6905,6907,6909,6912,6915],{"class":3022,"line":3072},[3020,6906,4949],{"class":3037},[3020,6908,4858],{"class":3046},[3020,6910,6911],{"class":3037},"() > ",[3020,6913,6914],{"class":3970},"0",[3020,6916,3942],{"class":3037},[3020,6918,6919],{"class":3022,"line":3092},[3020,6920,6921],{"class":3026},"// SQL: SELECT COUNT(*) FROM Orders WHERE CustomerId = @customerId\n",[3020,6923,6924],{"class":3022,"line":3104},[3020,6925,6926],{"class":3026},"// БД сканує ВСІ записи і рахує їх!\n",[3020,6928,6929],{"class":3022,"line":3121},[3020,6930,3494],{"emptyLinePlaceholder":3493},[3020,6932,6933],{"class":3022,"line":3138},[3020,6934,6935],{"class":3026},"// ✅ EXISTS: зупиняється на першому знайденому записі\n",[3020,6937,6938,6940,6942,6944,6946,6948,6950],{"class":3022,"line":3152},[3020,6939,6863],{"class":3371},[3020,6941,6866],{"class":3033},[3020,6943,3957],{"class":3037},[3020,6945,4469],{"class":3371},[3020,6947,4472],{"class":3033},[3020,6949,3038],{"class":3037},[3020,6951,4944],{"class":3033},[3020,6953,6954,6956,6958,6960,6962,6964,6966,6968,6970,6972,6974],{"class":3022,"line":3158},[3020,6955,4949],{"class":3037},[3020,6957,6576],{"class":3046},[3020,6959,3083],{"class":3037},[3020,6961,4956],{"class":3033},[3020,6963,4815],{"class":3037},[3020,6965,4956],{"class":3033},[3020,6967,3038],{"class":3037},[3020,6969,6895],{"class":3033},[3020,6971,3439],{"class":3037},[3020,6973,6900],{"class":3033},[3020,6975,3089],{"class":3037},[3020,6977,6978,6980,6983],{"class":3022,"line":3172},[3020,6979,4949],{"class":3037},[3020,6981,6982],{"class":3046},"AnyAsync",[3020,6984,4892],{"class":3037},[3020,6986,6987],{"class":3022,"line":3186},[3020,6988,6989],{"class":3026},"// SQL: SELECT CASE WHEN EXISTS (\n",[3020,6991,6992],{"class":3022,"line":3517},[3020,6993,6994],{"class":3026},"//          SELECT 1 FROM Orders WHERE CustomerId = @customerId\n",[3020,6996,6997],{"class":3022,"line":3530},[3020,6998,6999],{"class":3026},"//      ) THEN 1 ELSE 0 END\n",[3020,7001,7002],{"class":3022,"line":3536},[3020,7003,7004],{"class":3026},"// БД зупиняється одразу після знаходження першого запису!\n",[3020,7006,7007],{"class":3022,"line":3541},[3020,7008,3494],{"emptyLinePlaceholder":3493},[3020,7010,7011],{"class":3022,"line":3572},[3020,7012,7013],{"class":3026},"// ❌ Також погано: FirstOrDefault() != null\n",[3020,7015,7016,7018,7021,7023,7025,7027,7029],{"class":3022,"line":3577},[3020,7017,4461],{"class":3371},[3020,7019,7020],{"class":3033}," hasProduct",[3020,7022,3957],{"class":3037},[3020,7024,4469],{"class":3371},[3020,7026,4472],{"class":3033},[3020,7028,3038],{"class":3037},[3020,7030,6306],{"class":3033},[3020,7032,7033,7035,7037,7039,7041,7043,7045,7047,7049,7051,7054],{"class":3022,"line":3606},[3020,7034,4949],{"class":3037},[3020,7036,6576],{"class":3046},[3020,7038,3083],{"class":3037},[3020,7040,2965],{"class":3033},[3020,7042,4815],{"class":3037},[3020,7044,2965],{"class":3033},[3020,7046,3038],{"class":3037},[3020,7048,3436],{"class":3033},[3020,7050,3439],{"class":3037},[3020,7052,7053],{"class":3285},"\"Laptop\"",[3020,7055,3089],{"class":3037},[3020,7057,7058,7060,7063,7066,7069],{"class":3022,"line":3611},[3020,7059,4949],{"class":3037},[3020,7061,7062],{"class":3046},"FirstOrDefaultAsync",[3020,7064,7065],{"class":3037},"() != ",[3020,7067,7068],{"class":3371},"null",[3020,7070,3942],{"class":3037},[3020,7072,7073],{"class":3022,"line":3617},[3020,7074,7075],{"class":3026},"// SQL: SELECT TOP 1 * FROM Products WHERE Name = 'Laptop'\n",[3020,7077,7078],{"class":3022,"line":3647},[3020,7079,7080],{"class":3026},"// Завантажує всі поля entity (хоча потрібно лише перевірити існування)\n",[3020,7082,7083],{"class":3022,"line":3652},[3020,7084,3494],{"emptyLinePlaceholder":3493},[3020,7086,7087],{"class":3022,"line":3680},[3020,7088,7089],{"class":3026},"// ✅ Any()\n",[3020,7091,7092,7094,7096,7098,7100,7102,7104],{"class":3022,"line":3745},[3020,7093,4461],{"class":3371},[3020,7095,7020],{"class":3033},[3020,7097,3957],{"class":3037},[3020,7099,4469],{"class":3371},[3020,7101,4472],{"class":3033},[3020,7103,3038],{"class":3037},[3020,7105,6306],{"class":3033},[3020,7107,7108,7110,7112,7114,7116,7118,7120,7122,7124,7126,7128],{"class":3022,"line":3750},[3020,7109,4949],{"class":3037},[3020,7111,6982],{"class":3046},[3020,7113,3083],{"class":3037},[3020,7115,2965],{"class":3033},[3020,7117,4815],{"class":3037},[3020,7119,2965],{"class":3033},[3020,7121,3038],{"class":3037},[3020,7123,3436],{"class":3033},[3020,7125,3439],{"class":3037},[3020,7127,7053],{"class":3285},[3020,7129,3308],{"class":3037},[3020,7131,7132],{"class":3022,"line":3755},[3020,7133,7134],{"class":3026},"// SQL: EXISTS (SELECT 1 FROM Products WHERE Name = 'Laptop')\n",[3005,7136,7138],{"id":7137},"count-коли-справді-потрібна-кількість","Count коли справді потрібна кількість",[3010,7140,7142],{"className":3012,"code":7141,"language":3014,"meta":3015,"style":3015},"// ✅ Count коли потрібна точна кількість:\nint totalOrders = await context.Orders\n    .Where(o => o.CustomerId == customerId)\n    .CountAsync();\n\n// ✅ LongCount для великих таблиць:\nlong totalProducts = await context.Products.LongCountAsync();\n\n// ✅ Any у Where (NOT EXISTS):\nvar customersWithNoOrders = await context.Customers\n    .Where(c => !context.Orders.Any(o => o.CustomerId == c.Id))\n    .ToListAsync();\n// SQL: WHERE NOT EXISTS (SELECT 1 FROM Orders WHERE CustomerId = c.Id)\n",[3017,7143,7144,7149,7167,7191,7200,7204,7209,7234,7238,7243,7261,7308,7316],{"__ignoreMap":3015},[3020,7145,7146],{"class":3022,"line":3023},[3020,7147,7148],{"class":3026},"// ✅ Count коли потрібна точна кількість:\n",[3020,7150,7151,7154,7157,7159,7161,7163,7165],{"class":3022,"line":3030},[3020,7152,7153],{"class":3371},"int",[3020,7155,7156],{"class":3033}," totalOrders",[3020,7158,3957],{"class":3037},[3020,7160,4469],{"class":3371},[3020,7162,4472],{"class":3033},[3020,7164,3038],{"class":3037},[3020,7166,4944],{"class":3033},[3020,7168,7169,7171,7173,7175,7177,7179,7181,7183,7185,7187,7189],{"class":3022,"line":3066},[3020,7170,4949],{"class":3037},[3020,7172,6576],{"class":3046},[3020,7174,3083],{"class":3037},[3020,7176,4956],{"class":3033},[3020,7178,4815],{"class":3037},[3020,7180,4956],{"class":3033},[3020,7182,3038],{"class":3037},[3020,7184,6895],{"class":3033},[3020,7186,3439],{"class":3037},[3020,7188,6900],{"class":3033},[3020,7190,3089],{"class":3037},[3020,7192,7193,7195,7198],{"class":3022,"line":3072},[3020,7194,4949],{"class":3037},[3020,7196,7197],{"class":3046},"CountAsync",[3020,7199,4892],{"class":3037},[3020,7201,7202],{"class":3022,"line":3092},[3020,7203,3494],{"emptyLinePlaceholder":3493},[3020,7205,7206],{"class":3022,"line":3104},[3020,7207,7208],{"class":3026},"// ✅ LongCount для великих таблиць:\n",[3020,7210,7211,7214,7217,7219,7221,7223,7225,7227,7229,7232],{"class":3022,"line":3121},[3020,7212,7213],{"class":3371},"long",[3020,7215,7216],{"class":3033}," totalProducts",[3020,7218,3957],{"class":3037},[3020,7220,4469],{"class":3371},[3020,7222,4472],{"class":3033},[3020,7224,3038],{"class":3037},[3020,7226,4853],{"class":3033},[3020,7228,3038],{"class":3037},[3020,7230,7231],{"class":3046},"LongCountAsync",[3020,7233,4892],{"class":3037},[3020,7235,7236],{"class":3022,"line":3138},[3020,7237,3494],{"emptyLinePlaceholder":3493},[3020,7239,7240],{"class":3022,"line":3152},[3020,7241,7242],{"class":3026},"// ✅ Any у Where (NOT EXISTS):\n",[3020,7244,7245,7247,7250,7252,7254,7256,7258],{"class":3022,"line":3158},[3020,7246,4461],{"class":3371},[3020,7248,7249],{"class":3033}," customersWithNoOrders",[3020,7251,3957],{"class":3037},[3020,7253,4469],{"class":3371},[3020,7255,4472],{"class":3033},[3020,7257,3038],{"class":3037},[3020,7259,7260],{"class":3033},"Customers\n",[3020,7262,7263,7265,7267,7269,7271,7274,7276,7278,7280,7282,7285,7287,7289,7291,7293,7295,7297,7299,7301,7303,7305],{"class":3022,"line":3172},[3020,7264,4949],{"class":3037},[3020,7266,6576],{"class":3046},[3020,7268,3083],{"class":3037},[3020,7270,4812],{"class":3033},[3020,7272,7273],{"class":3037}," => !",[3020,7275,4848],{"class":3033},[3020,7277,3038],{"class":3037},[3020,7279,4477],{"class":3033},[3020,7281,3038],{"class":3037},[3020,7283,7284],{"class":3046},"Any",[3020,7286,3083],{"class":3037},[3020,7288,4956],{"class":3033},[3020,7290,4815],{"class":3037},[3020,7292,4956],{"class":3033},[3020,7294,3038],{"class":3037},[3020,7296,6895],{"class":3033},[3020,7298,3439],{"class":3037},[3020,7300,4812],{"class":3033},[3020,7302,3038],{"class":3037},[3020,7304,4544],{"class":3033},[3020,7306,7307],{"class":3037},"))\n",[3020,7309,7310,7312,7314],{"class":3022,"line":3186},[3020,7311,4949],{"class":3037},[3020,7313,4482],{"class":3046},[3020,7315,4892],{"class":3037},[3020,7317,7318],{"class":3022,"line":3517},[3020,7319,7320],{"class":3026},"// SQL: WHERE NOT EXISTS (SELECT 1 FROM Orders WHERE CustomerId = c.Id)\n",[2991,7322],{},[2960,7324,7326],{"id":7325},"pagination-offset-vs-keyset","Pagination: Offset vs Keyset",[2965,7328,7329],{},"Pagination — невід'ємна частина будь-якого API що повертає списки. Але стандартний Offset підхід має фундаментальний недолік що проявляється лише на великих таблицях.",[3005,7331,7333],{"id":7332},"offset-pagination-skiptake-стандартний-підхід","Offset Pagination (Skip/Take): стандартний підхід",[3010,7335,7337],{"className":3012,"code":7336,"language":3014,"meta":3015,"style":3015},"// Класична сторінкова навігація: сторінка N розміром PageSize\nint pageSize   = 20;\nint pageNumber = 50;  // п'ятдесята сторінка\n\nvar orders = await context.Orders\n    .OrderBy(o => o.PlacedAt)\n    .Skip((pageNumber - 1) * pageSize)   // OFFSET 980\n    .Take(pageSize)                       // FETCH NEXT 20 ROWS\n    .ToListAsync();\n\n// SQL Server:\n// SELECT ...\n// FROM Orders\n// ORDER BY PlacedAt\n// OFFSET 980 ROWS FETCH NEXT 20 ROWS ONLY;\n\n// PostgreSQL:\n// SELECT ... FROM orders ORDER BY placed_at LIMIT 20 OFFSET 980;\n",[3017,7338,7339,7344,7358,7376,7380,7396,7416,7445,7461,7469,7473,7478,7483,7488,7493,7498,7502,7507],{"__ignoreMap":3015},[3020,7340,7341],{"class":3022,"line":3023},[3020,7342,7343],{"class":3026},"// Класична сторінкова навігація: сторінка N розміром PageSize\n",[3020,7345,7346,7348,7351,7353,7356],{"class":3022,"line":3030},[3020,7347,7153],{"class":3371},[3020,7349,7350],{"class":3033}," pageSize",[3020,7352,6061],{"class":3037},[3020,7354,7355],{"class":3970},"20",[3020,7357,3942],{"class":3037},[3020,7359,7360,7362,7365,7367,7370,7373],{"class":3022,"line":3066},[3020,7361,7153],{"class":3371},[3020,7363,7364],{"class":3033}," pageNumber",[3020,7366,3957],{"class":3037},[3020,7368,7369],{"class":3970},"50",[3020,7371,7372],{"class":3037},";  ",[3020,7374,7375],{"class":3026},"// п'ятдесята сторінка\n",[3020,7377,7378],{"class":3022,"line":3072},[3020,7379,3494],{"emptyLinePlaceholder":3493},[3020,7381,7382,7384,7386,7388,7390,7392,7394],{"class":3022,"line":3092},[3020,7383,4461],{"class":3371},[3020,7385,4464],{"class":3033},[3020,7387,3957],{"class":3037},[3020,7389,4469],{"class":3371},[3020,7391,4472],{"class":3033},[3020,7393,3038],{"class":3037},[3020,7395,4944],{"class":3033},[3020,7397,7398,7400,7402,7404,7406,7408,7410,7412,7414],{"class":3022,"line":3104},[3020,7399,4949],{"class":3037},[3020,7401,6144],{"class":3046},[3020,7403,3083],{"class":3037},[3020,7405,4956],{"class":3033},[3020,7407,4815],{"class":3037},[3020,7409,4956],{"class":3033},[3020,7411,3038],{"class":3037},[3020,7413,5858],{"class":3033},[3020,7415,3089],{"class":3037},[3020,7417,7418,7420,7423,7426,7429,7432,7434,7437,7440,7442],{"class":3022,"line":3121},[3020,7419,4949],{"class":3037},[3020,7421,7422],{"class":3046},"Skip",[3020,7424,7425],{"class":3037},"((",[3020,7427,7428],{"class":3033},"pageNumber",[3020,7430,7431],{"class":3037}," - ",[3020,7433,5638],{"class":3970},[3020,7435,7436],{"class":3037},") * ",[3020,7438,7439],{"class":3033},"pageSize",[3020,7441,3449],{"class":3037},[3020,7443,7444],{"class":3026},"// OFFSET 980\n",[3020,7446,7447,7449,7451,7453,7455,7458],{"class":3022,"line":3138},[3020,7448,4949],{"class":3037},[3020,7450,6165],{"class":3046},[3020,7452,3083],{"class":3037},[3020,7454,7439],{"class":3033},[3020,7456,7457],{"class":3037},")                       ",[3020,7459,7460],{"class":3026},"// FETCH NEXT 20 ROWS\n",[3020,7462,7463,7465,7467],{"class":3022,"line":3152},[3020,7464,4949],{"class":3037},[3020,7466,4482],{"class":3046},[3020,7468,4892],{"class":3037},[3020,7470,7471],{"class":3022,"line":3158},[3020,7472,3494],{"emptyLinePlaceholder":3493},[3020,7474,7475],{"class":3022,"line":3172},[3020,7476,7477],{"class":3026},"// SQL Server:\n",[3020,7479,7480],{"class":3022,"line":3186},[3020,7481,7482],{"class":3026},"// SELECT ...\n",[3020,7484,7485],{"class":3022,"line":3517},[3020,7486,7487],{"class":3026},"// FROM Orders\n",[3020,7489,7490],{"class":3022,"line":3530},[3020,7491,7492],{"class":3026},"// ORDER BY PlacedAt\n",[3020,7494,7495],{"class":3022,"line":3536},[3020,7496,7497],{"class":3026},"// OFFSET 980 ROWS FETCH NEXT 20 ROWS ONLY;\n",[3020,7499,7500],{"class":3022,"line":3541},[3020,7501,3494],{"emptyLinePlaceholder":3493},[3020,7503,7504],{"class":3022,"line":3572},[3020,7505,7506],{"class":3026},"// PostgreSQL:\n",[3020,7508,7509],{"class":3022,"line":3577},[3020,7510,7511],{"class":3026},"// SELECT ... FROM orders ORDER BY placed_at LIMIT 20 OFFSET 980;\n",[2965,7513,7514,7517],{},[2969,7515,7516],{},"Проблема Offset на великих таблицях",": БД не може «прокрутити» до рядка 980 без читання попередніх 979. При сторінці 50,000 (OFFSET 999,980) — БД читає і відкидає майже мільйон записів перед поверненням 20 потрібних. Час зростає лінійно з номером сторінки.",[3005,7519,7521],{"id":7520},"keyset-pagination-cursor-based-правильний-підхід-для-великих-наборів","Keyset Pagination (Cursor-based): правильний підхід для великих наборів",[2965,7523,7524],{},"Замість «пропустити N рядків» — «почати після конкретного значення ключа»:",[3010,7526,7528],{"className":3012,"code":7527,"language":3014,"meta":3015,"style":3015},"// Перша сторінка:\nvar firstPage = await context.Orders\n    .OrderBy(o => o.PlacedAt)\n    .ThenBy(o => o.Id)          // tiebreaker (для унікальності)\n    .Take(pageSize)\n    .ToListAsync();\n\nvar lastItem = firstPage.Last();\n\n// Наступна сторінка (після останнього елементу попередньої):\nvar nextPage = await context.Orders\n    .Where(o => o.PlacedAt > lastItem.PlacedAt ||   // після по даті\n               (o.PlacedAt == lastItem.PlacedAt &&\n                o.Id > lastItem.Id))                  // або той самий час, але старший Id\n    .OrderBy(o => o.PlacedAt)\n    .ThenBy(o => o.Id)\n    .Take(pageSize)\n    .ToListAsync();\n\n// SQL:\n// SELECT TOP 20 *\n// FROM Orders\n// WHERE PlacedAt > '2024-06-15' OR (PlacedAt = '2024-06-15' AND Id > 12345)\n// ORDER BY PlacedAt, Id\n\n// БД використовує Index на (PlacedAt, Id) → O(log n) замість O(n)!\n",[3017,7529,7530,7535,7552,7572,7597,7609,7617,7621,7640,7644,7649,7666,7700,7722,7745,7765,7785,7797,7805,7809,7813,7818,7822,7827,7832,7836],{"__ignoreMap":3015},[3020,7531,7532],{"class":3022,"line":3023},[3020,7533,7534],{"class":3026},"// Перша сторінка:\n",[3020,7536,7537,7539,7542,7544,7546,7548,7550],{"class":3022,"line":3030},[3020,7538,4461],{"class":3371},[3020,7540,7541],{"class":3033}," firstPage",[3020,7543,3957],{"class":3037},[3020,7545,4469],{"class":3371},[3020,7547,4472],{"class":3033},[3020,7549,3038],{"class":3037},[3020,7551,4944],{"class":3033},[3020,7553,7554,7556,7558,7560,7562,7564,7566,7568,7570],{"class":3022,"line":3066},[3020,7555,4949],{"class":3037},[3020,7557,6144],{"class":3046},[3020,7559,3083],{"class":3037},[3020,7561,4956],{"class":3033},[3020,7563,4815],{"class":3037},[3020,7565,4956],{"class":3033},[3020,7567,3038],{"class":3037},[3020,7569,5858],{"class":3033},[3020,7571,3089],{"class":3037},[3020,7573,7574,7576,7579,7581,7583,7585,7587,7589,7591,7594],{"class":3022,"line":3072},[3020,7575,4949],{"class":3037},[3020,7577,7578],{"class":3046},"ThenBy",[3020,7580,3083],{"class":3037},[3020,7582,4956],{"class":3033},[3020,7584,4815],{"class":3037},[3020,7586,4956],{"class":3033},[3020,7588,3038],{"class":3037},[3020,7590,4544],{"class":3033},[3020,7592,7593],{"class":3037},")          ",[3020,7595,7596],{"class":3026},"// tiebreaker (для унікальності)\n",[3020,7598,7599,7601,7603,7605,7607],{"class":3022,"line":3092},[3020,7600,4949],{"class":3037},[3020,7602,6165],{"class":3046},[3020,7604,3083],{"class":3037},[3020,7606,7439],{"class":3033},[3020,7608,3089],{"class":3037},[3020,7610,7611,7613,7615],{"class":3022,"line":3104},[3020,7612,4949],{"class":3037},[3020,7614,4482],{"class":3046},[3020,7616,4892],{"class":3037},[3020,7618,7619],{"class":3022,"line":3121},[3020,7620,3494],{"emptyLinePlaceholder":3493},[3020,7622,7623,7625,7628,7630,7633,7635,7638],{"class":3022,"line":3138},[3020,7624,4461],{"class":3371},[3020,7626,7627],{"class":3033}," lastItem",[3020,7629,3957],{"class":3037},[3020,7631,7632],{"class":3033},"firstPage",[3020,7634,3038],{"class":3037},[3020,7636,7637],{"class":3046},"Last",[3020,7639,4892],{"class":3037},[3020,7641,7642],{"class":3022,"line":3152},[3020,7643,3494],{"emptyLinePlaceholder":3493},[3020,7645,7646],{"class":3022,"line":3158},[3020,7647,7648],{"class":3026},"// Наступна сторінка (після останнього елементу попередньої):\n",[3020,7650,7651,7653,7656,7658,7660,7662,7664],{"class":3022,"line":3172},[3020,7652,4461],{"class":3371},[3020,7654,7655],{"class":3033}," nextPage",[3020,7657,3957],{"class":3037},[3020,7659,4469],{"class":3371},[3020,7661,4472],{"class":3033},[3020,7663,3038],{"class":3037},[3020,7665,4944],{"class":3033},[3020,7667,7668,7670,7672,7674,7676,7678,7680,7682,7684,7687,7690,7692,7694,7697],{"class":3022,"line":3186},[3020,7669,4949],{"class":3037},[3020,7671,6576],{"class":3046},[3020,7673,3083],{"class":3037},[3020,7675,4956],{"class":3033},[3020,7677,4815],{"class":3037},[3020,7679,4956],{"class":3033},[3020,7681,3038],{"class":3037},[3020,7683,5858],{"class":3033},[3020,7685,7686],{"class":3037}," > ",[3020,7688,7689],{"class":3033},"lastItem",[3020,7691,3038],{"class":3037},[3020,7693,5858],{"class":3033},[3020,7695,7696],{"class":3037}," ||   ",[3020,7698,7699],{"class":3026},"// після по даті\n",[3020,7701,7702,7705,7707,7709,7711,7713,7715,7717,7719],{"class":3022,"line":3517},[3020,7703,7704],{"class":3037},"               (",[3020,7706,4956],{"class":3033},[3020,7708,3038],{"class":3037},[3020,7710,5858],{"class":3033},[3020,7712,3439],{"class":3037},[3020,7714,7689],{"class":3033},[3020,7716,3038],{"class":3037},[3020,7718,5858],{"class":3033},[3020,7720,7721],{"class":3037}," &&\n",[3020,7723,7724,7727,7729,7731,7733,7735,7737,7739,7742],{"class":3022,"line":3530},[3020,7725,7726],{"class":3033},"                o",[3020,7728,3038],{"class":3037},[3020,7730,4544],{"class":3033},[3020,7732,7686],{"class":3037},[3020,7734,7689],{"class":3033},[3020,7736,3038],{"class":3037},[3020,7738,4544],{"class":3033},[3020,7740,7741],{"class":3037},"))                  ",[3020,7743,7744],{"class":3026},"// або той самий час, але старший Id\n",[3020,7746,7747,7749,7751,7753,7755,7757,7759,7761,7763],{"class":3022,"line":3536},[3020,7748,4949],{"class":3037},[3020,7750,6144],{"class":3046},[3020,7752,3083],{"class":3037},[3020,7754,4956],{"class":3033},[3020,7756,4815],{"class":3037},[3020,7758,4956],{"class":3033},[3020,7760,3038],{"class":3037},[3020,7762,5858],{"class":3033},[3020,7764,3089],{"class":3037},[3020,7766,7767,7769,7771,7773,7775,7777,7779,7781,7783],{"class":3022,"line":3541},[3020,7768,4949],{"class":3037},[3020,7770,7578],{"class":3046},[3020,7772,3083],{"class":3037},[3020,7774,4956],{"class":3033},[3020,7776,4815],{"class":3037},[3020,7778,4956],{"class":3033},[3020,7780,3038],{"class":3037},[3020,7782,4544],{"class":3033},[3020,7784,3089],{"class":3037},[3020,7786,7787,7789,7791,7793,7795],{"class":3022,"line":3572},[3020,7788,4949],{"class":3037},[3020,7790,6165],{"class":3046},[3020,7792,3083],{"class":3037},[3020,7794,7439],{"class":3033},[3020,7796,3089],{"class":3037},[3020,7798,7799,7801,7803],{"class":3022,"line":3577},[3020,7800,4949],{"class":3037},[3020,7802,4482],{"class":3046},[3020,7804,4892],{"class":3037},[3020,7806,7807],{"class":3022,"line":3606},[3020,7808,3494],{"emptyLinePlaceholder":3493},[3020,7810,7811],{"class":3022,"line":3611},[3020,7812,4987],{"class":3026},[3020,7814,7815],{"class":3022,"line":3617},[3020,7816,7817],{"class":3026},"// SELECT TOP 20 *\n",[3020,7819,7820],{"class":3022,"line":3647},[3020,7821,7487],{"class":3026},[3020,7823,7824],{"class":3022,"line":3652},[3020,7825,7826],{"class":3026},"// WHERE PlacedAt > '2024-06-15' OR (PlacedAt = '2024-06-15' AND Id > 12345)\n",[3020,7828,7829],{"class":3022,"line":3680},[3020,7830,7831],{"class":3026},"// ORDER BY PlacedAt, Id\n",[3020,7833,7834],{"class":3022,"line":3745},[3020,7835,3494],{"emptyLinePlaceholder":3493},[3020,7837,7838],{"class":3022,"line":3750},[3020,7839,7840],{"class":3026},"// БД використовує Index на (PlacedAt, Id) → O(log n) замість O(n)!\n",[3005,7842,7844],{"id":7843},"generic-keyset-pagination","Generic Keyset Pagination",[3010,7846,7848],{"className":3012,"code":7847,"language":3014,"meta":3015,"style":3015},"// Реалізація через курсор (base64-encoded JSON стан):\npublic class PagedResult\u003CT>\n{\n    public IReadOnlyList\u003CT> Items   { get; init; } = Array.Empty\u003CT>();\n    public string?   NextCursor     { get; init; }  // null = остання сторінка\n    public bool      HasNextPage    => NextCursor is not null;\n}\n\npublic async Task\u003CPagedResult\u003COrderDto>> GetOrdersPageAsync(\n    string? cursor, int pageSize = 20)\n{\n    var query = context.Orders\n        .OrderBy(o => o.PlacedAt)\n        .ThenBy(o => o.Id);\n\n    // Декодувати курсор\n    if (cursor is not null)\n    {\n        var state = DecodeCursor(cursor);  // { PlacedAt, Id }\n        query = query.Where(o =>\n            o.PlacedAt > state.PlacedAt ||\n            (o.PlacedAt == state.PlacedAt && o.Id > state.Id));\n    }\n\n    var items = await query\n        .Take(pageSize + 1)   // +1 щоб знати чи є наступна сторінка\n        .Select(o => new OrderDto\n        {\n            Id          = o.Id,\n            PlacedAt    = o.PlacedAt,\n            TotalAmount = o.TotalAmount\n        })\n        .ToListAsync();\n\n    string? nextCursor = null;\n    if (items.Count > pageSize)\n    {\n        items.RemoveAt(pageSize);  // видалити +1 елемент\n        var lastItem = items.Last();\n        nextCursor = EncodeCursor(lastItem.PlacedAt, lastItem.Id);\n    }\n\n    return new PagedResult\u003COrderDto> { Items = items, NextCursor = nextCursor };\n}\n\nprivate static string EncodeCursor(DateTime placedAt, int id)\n    => Convert.ToBase64String(\n        JsonSerializer.SerializeToUtf8Bytes(new { PlacedAt = placedAt, Id = id }));\n\nprivate static (DateTime PlacedAt, int Id) DecodeCursor(string cursor)\n{\n    var json  = Convert.FromBase64String(cursor);\n    var state = JsonSerializer.Deserialize\u003CJsonElement>(json);\n    return (state.GetProperty(\"PlacedAt\").GetDateTime(),\n            state.GetProperty(\"Id\").GetInt32());\n}\n",[3017,7849,7850,7855,7871,7875,7920,7948,7974,7978,7982,8010,8033,8037,8053,8073,8093,8097,8102,8119,8123,8146,8166,8187,8225,8229,8233,8247,8267,8284,8288,8304,8319,8333,8338,8346,8350,8365,8384,8388,8407,8423,8451,8455,8459,8493,8497,8501,8531,8545,8581,8586,8621,8626,8649,8678,8705,8727],{"__ignoreMap":3015},[3020,7851,7852],{"class":3022,"line":3023},[3020,7853,7854],{"class":3026},"// Реалізація через курсор (base64-encoded JSON стан):\n",[3020,7856,7857,7859,7861,7864,7866,7869],{"class":3022,"line":3030},[3020,7858,3372],{"class":3371},[3020,7860,3375],{"class":3371},[3020,7862,7863],{"class":3053}," PagedResult",[3020,7865,3050],{"class":3037},[3020,7867,7868],{"class":3053},"T",[3020,7870,3391],{"class":3037},[3020,7872,7873],{"class":3022,"line":3066},[3020,7874,3069],{"class":3037},[3020,7876,7877,7879,7882,7884,7886,7888,7891,7894,7897,7900,7903,7906,7909,7911,7914,7916,7918],{"class":3022,"line":3072},[3020,7878,3400],{"class":3371},[3020,7880,7881],{"class":3053}," IReadOnlyList",[3020,7883,3050],{"class":3037},[3020,7885,7868],{"class":3053},[3020,7887,3936],{"class":3037},[3020,7889,7890],{"class":3033},"Items",[3020,7892,7893],{"class":3037},"   { ",[3020,7895,7896],{"class":3371},"get",[3020,7898,7899],{"class":3037},"; ",[3020,7901,7902],{"class":3371},"init",[3020,7904,7905],{"class":3037},"; } = ",[3020,7907,7908],{"class":3033},"Array",[3020,7910,3038],{"class":3037},[3020,7912,7913],{"class":3046},"Empty",[3020,7915,3050],{"class":3037},[3020,7917,7868],{"class":3053},[3020,7919,4430],{"class":3037},[3020,7921,7922,7924,7927,7930,7933,7936,7938,7940,7942,7945],{"class":3022,"line":3092},[3020,7923,3400],{"class":3371},[3020,7925,7926],{"class":3371}," string",[3020,7928,7929],{"class":3037},"?   ",[3020,7931,7932],{"class":3033},"NextCursor",[3020,7934,7935],{"class":3037},"     { ",[3020,7937,7896],{"class":3371},[3020,7939,7899],{"class":3037},[3020,7941,7902],{"class":3371},[3020,7943,7944],{"class":3037},"; }  ",[3020,7946,7947],{"class":3026},"// null = остання сторінка\n",[3020,7949,7950,7952,7955,7958,7961,7963,7966,7969,7972],{"class":3022,"line":3104},[3020,7951,3400],{"class":3371},[3020,7953,7954],{"class":3371}," bool",[3020,7956,7957],{"class":3033},"      HasNextPage",[3020,7959,7960],{"class":3037},"    => ",[3020,7962,7932],{"class":3033},[3020,7964,7965],{"class":3371}," is",[3020,7967,7968],{"class":3371}," not",[3020,7970,7971],{"class":3371}," null",[3020,7973,3942],{"class":3037},[3020,7975,7976],{"class":3022,"line":3121},[3020,7977,3533],{"class":3037},[3020,7979,7980],{"class":3022,"line":3138},[3020,7981,3494],{"emptyLinePlaceholder":3493},[3020,7983,7984,7986,7989,7992,7994,7997,7999,8002,8005,8008],{"class":3022,"line":3152},[3020,7985,3372],{"class":3371},[3020,7987,7988],{"class":3371}," async",[3020,7990,7991],{"class":3053}," Task",[3020,7993,3050],{"class":3037},[3020,7995,7996],{"class":3053},"PagedResult",[3020,7998,3050],{"class":3037},[3020,8000,8001],{"class":3053},"OrderDto",[3020,8003,8004],{"class":3037},">> ",[3020,8006,8007],{"class":3046},"GetOrdersPageAsync",[3020,8009,3101],{"class":3037},[3020,8011,8012,8015,8018,8021,8023,8025,8027,8029,8031],{"class":3022,"line":3158},[3020,8013,8014],{"class":3371},"    string",[3020,8016,8017],{"class":3037},"? ",[3020,8019,8020],{"class":3033},"cursor",[3020,8022,3289],{"class":3037},[3020,8024,7153],{"class":3371},[3020,8026,7350],{"class":3033},[3020,8028,3957],{"class":3037},[3020,8030,7355],{"class":3970},[3020,8032,3089],{"class":3037},[3020,8034,8035],{"class":3022,"line":3172},[3020,8036,3069],{"class":3037},[3020,8038,8039,8042,8045,8047,8049,8051],{"class":3022,"line":3186},[3020,8040,8041],{"class":3371},"    var",[3020,8043,8044],{"class":3033}," query",[3020,8046,3957],{"class":3037},[3020,8048,4848],{"class":3033},[3020,8050,3038],{"class":3037},[3020,8052,4944],{"class":3033},[3020,8054,8055,8057,8059,8061,8063,8065,8067,8069,8071],{"class":3022,"line":3517},[3020,8056,5113],{"class":3037},[3020,8058,6144],{"class":3046},[3020,8060,3083],{"class":3037},[3020,8062,4956],{"class":3033},[3020,8064,4815],{"class":3037},[3020,8066,4956],{"class":3033},[3020,8068,3038],{"class":3037},[3020,8070,5858],{"class":3033},[3020,8072,3089],{"class":3037},[3020,8074,8075,8077,8079,8081,8083,8085,8087,8089,8091],{"class":3022,"line":3530},[3020,8076,5113],{"class":3037},[3020,8078,7578],{"class":3046},[3020,8080,3083],{"class":3037},[3020,8082,4956],{"class":3033},[3020,8084,4815],{"class":3037},[3020,8086,4956],{"class":3033},[3020,8088,3038],{"class":3037},[3020,8090,4544],{"class":3033},[3020,8092,3308],{"class":3037},[3020,8094,8095],{"class":3022,"line":3536},[3020,8096,3494],{"emptyLinePlaceholder":3493},[3020,8098,8099],{"class":3022,"line":3541},[3020,8100,8101],{"class":3026},"    // Декодувати курсор\n",[3020,8103,8104,8107,8109,8111,8113,8115,8117],{"class":3022,"line":3572},[3020,8105,8106],{"class":3425},"    if",[3020,8108,3334],{"class":3037},[3020,8110,8020],{"class":3033},[3020,8112,7965],{"class":3371},[3020,8114,7968],{"class":3371},[3020,8116,7971],{"class":3371},[3020,8118,3089],{"class":3037},[3020,8120,8121],{"class":3022,"line":3577},[3020,8122,3420],{"class":3037},[3020,8124,8125,8128,8131,8133,8136,8138,8140,8143],{"class":3022,"line":3606},[3020,8126,8127],{"class":3371},"        var",[3020,8129,8130],{"class":3033}," state",[3020,8132,3957],{"class":3037},[3020,8134,8135],{"class":3046},"DecodeCursor",[3020,8137,3083],{"class":3037},[3020,8139,8020],{"class":3033},[3020,8141,8142],{"class":3037},");  ",[3020,8144,8145],{"class":3026},"// { PlacedAt, Id }\n",[3020,8147,8148,8151,8153,8156,8158,8160,8162,8164],{"class":3022,"line":3611},[3020,8149,8150],{"class":3033},"        query",[3020,8152,3957],{"class":3037},[3020,8154,8155],{"class":3033},"query",[3020,8157,3038],{"class":3037},[3020,8159,6576],{"class":3046},[3020,8161,3083],{"class":3037},[3020,8163,4956],{"class":3033},[3020,8165,3063],{"class":3037},[3020,8167,8168,8171,8173,8175,8177,8180,8182,8184],{"class":3022,"line":3617},[3020,8169,8170],{"class":3033},"            o",[3020,8172,3038],{"class":3037},[3020,8174,5858],{"class":3033},[3020,8176,7686],{"class":3037},[3020,8178,8179],{"class":3033},"state",[3020,8181,3038],{"class":3037},[3020,8183,5858],{"class":3033},[3020,8185,8186],{"class":3037}," ||\n",[3020,8188,8189,8192,8194,8196,8198,8200,8202,8204,8206,8209,8211,8213,8215,8217,8219,8221,8223],{"class":3022,"line":3647},[3020,8190,8191],{"class":3037},"            (",[3020,8193,4956],{"class":3033},[3020,8195,3038],{"class":3037},[3020,8197,5858],{"class":3033},[3020,8199,3439],{"class":3037},[3020,8201,8179],{"class":3033},[3020,8203,3038],{"class":3037},[3020,8205,5858],{"class":3033},[3020,8207,8208],{"class":3037}," && ",[3020,8210,4956],{"class":3033},[3020,8212,3038],{"class":3037},[3020,8214,4544],{"class":3033},[3020,8216,7686],{"class":3037},[3020,8218,8179],{"class":3033},[3020,8220,3038],{"class":3037},[3020,8222,4544],{"class":3033},[3020,8224,6822],{"class":3037},[3020,8226,8227],{"class":3022,"line":3652},[3020,8228,3488],{"class":3037},[3020,8230,8231],{"class":3022,"line":3680},[3020,8232,3494],{"emptyLinePlaceholder":3493},[3020,8234,8235,8237,8240,8242,8244],{"class":3022,"line":3745},[3020,8236,8041],{"class":3371},[3020,8238,8239],{"class":3033}," items",[3020,8241,3957],{"class":3037},[3020,8243,4469],{"class":3371},[3020,8245,8246],{"class":3033}," query\n",[3020,8248,8249,8251,8253,8255,8257,8260,8262,8264],{"class":3022,"line":3750},[3020,8250,5113],{"class":3037},[3020,8252,6165],{"class":3046},[3020,8254,3083],{"class":3037},[3020,8256,7439],{"class":3033},[3020,8258,8259],{"class":3037}," + ",[3020,8261,5638],{"class":3970},[3020,8263,3449],{"class":3037},[3020,8265,8266],{"class":3026},"// +1 щоб знати чи є наступна сторінка\n",[3020,8268,8269,8271,8273,8275,8277,8279,8281],{"class":3022,"line":3755},[3020,8270,5113],{"class":3037},[3020,8272,4807],{"class":3046},[3020,8274,3083],{"class":3037},[3020,8276,4956],{"class":3033},[3020,8278,4815],{"class":3037},[3020,8280,3472],{"class":3371},[3020,8282,8283],{"class":3053}," OrderDto\n",[3020,8285,8286],{"class":3022,"line":3761},[3020,8287,3457],{"class":3037},[3020,8289,8290,8293,8296,8298,8300,8302],{"class":3022,"line":3781},[3020,8291,8292],{"class":3033},"            Id",[3020,8294,8295],{"class":3037},"          = ",[3020,8297,4956],{"class":3033},[3020,8299,3038],{"class":3037},[3020,8301,4544],{"class":3033},[3020,8303,4042],{"class":3037},[3020,8305,8306,8309,8311,8313,8315,8317],{"class":3022,"line":3786},[3020,8307,8308],{"class":3033},"            PlacedAt",[3020,8310,6221],{"class":3037},[3020,8312,4956],{"class":3033},[3020,8314,3038],{"class":3037},[3020,8316,5858],{"class":3033},[3020,8318,4042],{"class":3037},[3020,8320,8321,8324,8326,8328,8330],{"class":3022,"line":3807},[3020,8322,8323],{"class":3033},"            TotalAmount",[3020,8325,3957],{"class":3037},[3020,8327,4956],{"class":3033},[3020,8329,3038],{"class":3037},[3020,8331,8332],{"class":3033},"TotalAmount\n",[3020,8334,8335],{"class":3022,"line":3812},[3020,8336,8337],{"class":3037},"        })\n",[3020,8339,8340,8342,8344],{"class":3022,"line":3817},[3020,8341,5113],{"class":3037},[3020,8343,4482],{"class":3046},[3020,8345,4892],{"class":3037},[3020,8347,8348],{"class":3022,"line":3822},[3020,8349,3494],{"emptyLinePlaceholder":3493},[3020,8351,8352,8354,8356,8359,8361,8363],{"class":3022,"line":3839},[3020,8353,8014],{"class":3371},[3020,8355,8017],{"class":3037},[3020,8357,8358],{"class":3033},"nextCursor",[3020,8360,3957],{"class":3037},[3020,8362,7068],{"class":3371},[3020,8364,3942],{"class":3037},[3020,8366,8367,8369,8371,8374,8376,8378,8380,8382],{"class":3022,"line":3850},[3020,8368,8106],{"class":3425},[3020,8370,3334],{"class":3037},[3020,8372,8373],{"class":3033},"items",[3020,8375,3038],{"class":3037},[3020,8377,4858],{"class":3033},[3020,8379,7686],{"class":3037},[3020,8381,7439],{"class":3033},[3020,8383,3089],{"class":3037},[3020,8385,8386],{"class":3022,"line":3855},[3020,8387,3420],{"class":3037},[3020,8389,8390,8393,8395,8398,8400,8402,8404],{"class":3022,"line":3860},[3020,8391,8392],{"class":3033},"        items",[3020,8394,3038],{"class":3037},[3020,8396,8397],{"class":3046},"RemoveAt",[3020,8399,3083],{"class":3037},[3020,8401,7439],{"class":3033},[3020,8403,8142],{"class":3037},[3020,8405,8406],{"class":3026},"// видалити +1 елемент\n",[3020,8408,8409,8411,8413,8415,8417,8419,8421],{"class":3022,"line":3866},[3020,8410,8127],{"class":3371},[3020,8412,7627],{"class":3033},[3020,8414,3957],{"class":3037},[3020,8416,8373],{"class":3033},[3020,8418,3038],{"class":3037},[3020,8420,7637],{"class":3046},[3020,8422,4892],{"class":3037},[3020,8424,8425,8428,8430,8433,8435,8437,8439,8441,8443,8445,8447,8449],{"class":3022,"line":4323},[3020,8426,8427],{"class":3033},"        nextCursor",[3020,8429,3957],{"class":3037},[3020,8431,8432],{"class":3046},"EncodeCursor",[3020,8434,3083],{"class":3037},[3020,8436,7689],{"class":3033},[3020,8438,3038],{"class":3037},[3020,8440,5858],{"class":3033},[3020,8442,3289],{"class":3037},[3020,8444,7689],{"class":3033},[3020,8446,3038],{"class":3037},[3020,8448,4544],{"class":3033},[3020,8450,3308],{"class":3037},[3020,8452,8453],{"class":3022,"line":4328},[3020,8454,3488],{"class":3037},[3020,8456,8457],{"class":3022,"line":4333},[3020,8458,3494],{"emptyLinePlaceholder":3493},[3020,8460,8461,8464,8467,8469,8471,8473,8476,8478,8480,8482,8484,8486,8488,8490],{"class":3022,"line":4338},[3020,8462,8463],{"class":3425},"    return",[3020,8465,8466],{"class":3371}," new",[3020,8468,7863],{"class":3053},[3020,8470,3050],{"class":3037},[3020,8472,8001],{"class":3053},[3020,8474,8475],{"class":3037},"> { ",[3020,8477,7890],{"class":3033},[3020,8479,3957],{"class":3037},[3020,8481,8373],{"class":3033},[3020,8483,3289],{"class":3037},[3020,8485,7932],{"class":3033},[3020,8487,3957],{"class":3037},[3020,8489,8358],{"class":3033},[3020,8491,8492],{"class":3037}," };\n",[3020,8494,8495],{"class":3022,"line":4368},[3020,8496,3533],{"class":3037},[3020,8498,8499],{"class":3022,"line":4383},[3020,8500,3494],{"emptyLinePlaceholder":3493},[3020,8502,8503,8506,8509,8511,8514,8516,8519,8522,8524,8526,8529],{"class":3022,"line":4407},[3020,8504,8505],{"class":3371},"private",[3020,8507,8508],{"class":3371}," static",[3020,8510,7926],{"class":3371},[3020,8512,8513],{"class":3046}," EncodeCursor",[3020,8515,3083],{"class":3037},[3020,8517,8518],{"class":3053},"DateTime",[3020,8520,8521],{"class":3033}," placedAt",[3020,8523,3289],{"class":3037},[3020,8525,7153],{"class":3371},[3020,8527,8528],{"class":3033}," id",[3020,8530,3089],{"class":3037},[3020,8532,8533,8535,8538,8540,8543],{"class":3022,"line":4412},[3020,8534,7960],{"class":3037},[3020,8536,8537],{"class":3033},"Convert",[3020,8539,3038],{"class":3037},[3020,8541,8542],{"class":3046},"ToBase64String",[3020,8544,3101],{"class":3037},[3020,8546,8548,8551,8553,8556,8558,8560,8562,8564,8566,8569,8571,8573,8575,8578],{"class":3022,"line":8547},48,[3020,8549,8550],{"class":3033},"        JsonSerializer",[3020,8552,3038],{"class":3037},[3020,8554,8555],{"class":3046},"SerializeToUtf8Bytes",[3020,8557,3083],{"class":3037},[3020,8559,3472],{"class":3371},[3020,8561,6326],{"class":3037},[3020,8563,5858],{"class":3033},[3020,8565,3957],{"class":3037},[3020,8567,8568],{"class":3033},"placedAt",[3020,8570,3289],{"class":3037},[3020,8572,4544],{"class":3033},[3020,8574,3957],{"class":3037},[3020,8576,8577],{"class":3033},"id",[3020,8579,8580],{"class":3037}," }));\n",[3020,8582,8584],{"class":3022,"line":8583},49,[3020,8585,3494],{"emptyLinePlaceholder":3493},[3020,8587,8589,8591,8593,8595,8597,8600,8602,8604,8607,8610,8612,8614,8616,8619],{"class":3022,"line":8588},50,[3020,8590,8505],{"class":3371},[3020,8592,8508],{"class":3371},[3020,8594,3334],{"class":3037},[3020,8596,8518],{"class":3053},[3020,8598,8599],{"class":3033}," PlacedAt",[3020,8601,3289],{"class":3037},[3020,8603,7153],{"class":3371},[3020,8605,8606],{"class":3033}," Id",[3020,8608,8609],{"class":3037},") ",[3020,8611,8135],{"class":3046},[3020,8613,3083],{"class":3037},[3020,8615,3561],{"class":3371},[3020,8617,8618],{"class":3033}," cursor",[3020,8620,3089],{"class":3037},[3020,8622,8624],{"class":3022,"line":8623},51,[3020,8625,3069],{"class":3037},[3020,8627,8629,8631,8634,8636,8638,8640,8643,8645,8647],{"class":3022,"line":8628},52,[3020,8630,8041],{"class":3371},[3020,8632,8633],{"class":3033}," json",[3020,8635,5811],{"class":3037},[3020,8637,8537],{"class":3033},[3020,8639,3038],{"class":3037},[3020,8641,8642],{"class":3046},"FromBase64String",[3020,8644,3083],{"class":3037},[3020,8646,8020],{"class":3033},[3020,8648,3308],{"class":3037},[3020,8650,8652,8654,8656,8658,8661,8663,8666,8668,8671,8673,8676],{"class":3022,"line":8651},53,[3020,8653,8041],{"class":3371},[3020,8655,8130],{"class":3033},[3020,8657,3957],{"class":3037},[3020,8659,8660],{"class":3033},"JsonSerializer",[3020,8662,3038],{"class":3037},[3020,8664,8665],{"class":3046},"Deserialize",[3020,8667,3050],{"class":3037},[3020,8669,8670],{"class":3053},"JsonElement",[3020,8672,3057],{"class":3037},[3020,8674,8675],{"class":3033},"json",[3020,8677,3308],{"class":3037},[3020,8679,8681,8683,8685,8687,8689,8692,8694,8697,8700,8703],{"class":3022,"line":8680},54,[3020,8682,8463],{"class":3425},[3020,8684,3334],{"class":3037},[3020,8686,8179],{"class":3033},[3020,8688,3038],{"class":3037},[3020,8690,8691],{"class":3046},"GetProperty",[3020,8693,3083],{"class":3037},[3020,8695,8696],{"class":3285},"\"PlacedAt\"",[3020,8698,8699],{"class":3037},").",[3020,8701,8702],{"class":3046},"GetDateTime",[3020,8704,6074],{"class":3037},[3020,8706,8708,8711,8713,8715,8717,8720,8722,8725],{"class":3022,"line":8707},55,[3020,8709,8710],{"class":3033},"            state",[3020,8712,3038],{"class":3037},[3020,8714,8691],{"class":3046},[3020,8716,3083],{"class":3037},[3020,8718,8719],{"class":3285},"\"Id\"",[3020,8721,8699],{"class":3037},[3020,8723,8724],{"class":3046},"GetInt32",[3020,8726,3478],{"class":3037},[3020,8728,8730],{"class":3022,"line":8729},56,[3020,8731,3533],{"class":3037},[3005,8733,8735],{"id":8734},"порівняння-offset-vs-keyset","Порівняння Offset vs Keyset",[5593,8737,8738,8750],{},[5596,8739,8740],{},[5599,8741,8742,8744,8747],{},[5602,8743],{},[5602,8745,8746],{},"Offset Pagination",[5602,8748,8749],{},"Keyset Pagination",[5614,8751,8752,8762,8773,8784,8795,8806],{},[5599,8753,8754,8757,8760],{},[5619,8755,8756],{},"Перша сторінка",[5619,8758,8759],{},"✅ Просто",[5619,8761,8759],{},[5599,8763,8764,8767,8770],{},[5619,8765,8766],{},"Сторінка 1,000+",[5619,8768,8769],{},"❌ Повільно",[5619,8771,8772],{},"✅ Завжди швидко",[5599,8774,8775,8778,8781],{},[5619,8776,8777],{},"Перехід до довільної сторінки",[5619,8779,8780],{},"✅ Skip(N)",[5619,8782,8783],{},"❌ Неможливо",[5599,8785,8786,8789,8792],{},[5619,8787,8788],{},"Консиситентність",[5619,8790,8791],{},"❌ Нові записи зсувають сторінки",[5619,8793,8794],{},"✅ Стабільний курсор",[5599,8796,8797,8800,8803],{},[5619,8798,8799],{},"Загальна кількість",[5619,8801,8802],{},"✅ COUNT(*)",[5619,8804,8805],{},"✅ COUNT(*) (але дорого)",[5599,8807,8808,8811,8814],{},[5619,8809,8810],{},"Використання",[5619,8812,8813],{},"Адмін, звіти, малі набори",[5619,8815,8816],{},"API, infinite scroll, великі набори",[2991,8818],{},[2960,8820,8822],{"id":8821},"buffering-vs-streaming-tolist-vs-asasyncenumerable","Buffering vs Streaming: ToList vs AsAsyncEnumerable",[2965,8824,8825,8826,8829,8830,8833,8834,3038],{},"Стандартний ",[3017,8827,8828],{},"ToListAsync()"," — буферизує ",[2969,8831,8832],{},"всі"," результати у пам'яті перед поверненням. Для великих наборів це може призвести до ",[3017,8835,8836],{},"OutOfMemoryException",[2965,8838,8839,8842],{},[3017,8840,8841],{},"AsAsyncEnumerable()"," — streaming підхід: отримуємо і обробляємо по одному рядку без завантаження всього у пам'ять.",[3010,8844,8846],{"className":3012,"code":8845,"language":3014,"meta":3015,"style":3015},"// ❌ ToListAsync: завантажує ALL records у пам'ять\nvar allProducts = await context.Products\n    .Where(p => p.IsActive)\n    .ToListAsync();            // 1M рядків → 1M об'єктів у RAM!\n\nforeach (var product in allProducts)\n{\n    await ProcessProductAsync(product);\n}\n\n// ✅ AsAsyncEnumerable: streaming (один рядок у RAM у будь-який момент)\nawait foreach (var product in context.Products\n    .Where(p => p.IsActive)\n    .AsAsyncEnumerable())\n{\n    await ProcessProductAsync(product);  // оброблено і звільнено з RAM\n}\n// SQL: один запит, але результати читаються потоково\n",[3017,8847,8848,8853,8870,8890,8902,8906,8923,8927,8942,8946,8950,8955,8976,8996,9006,9010,9025,9029],{"__ignoreMap":3015},[3020,8849,8850],{"class":3022,"line":3023},[3020,8851,8852],{"class":3026},"// ❌ ToListAsync: завантажує ALL records у пам'ять\n",[3020,8854,8855,8857,8860,8862,8864,8866,8868],{"class":3022,"line":3030},[3020,8856,4461],{"class":3371},[3020,8858,8859],{"class":3033}," allProducts",[3020,8861,3957],{"class":3037},[3020,8863,4469],{"class":3371},[3020,8865,4472],{"class":3033},[3020,8867,3038],{"class":3037},[3020,8869,6306],{"class":3033},[3020,8871,8872,8874,8876,8878,8880,8882,8884,8886,8888],{"class":3022,"line":3066},[3020,8873,4949],{"class":3037},[3020,8875,6576],{"class":3046},[3020,8877,3083],{"class":3037},[3020,8879,2965],{"class":3033},[3020,8881,4815],{"class":3037},[3020,8883,2965],{"class":3033},[3020,8885,3038],{"class":3037},[3020,8887,6589],{"class":3033},[3020,8889,3089],{"class":3037},[3020,8891,8892,8894,8896,8899],{"class":3022,"line":3072},[3020,8893,4949],{"class":3037},[3020,8895,4482],{"class":3046},[3020,8897,8898],{"class":3037},"();            ",[3020,8900,8901],{"class":3026},"// 1M рядків → 1M об'єктів у RAM!\n",[3020,8903,8904],{"class":3022,"line":3092},[3020,8905,3494],{"emptyLinePlaceholder":3493},[3020,8907,8908,8910,8912,8914,8917,8919,8921],{"class":3022,"line":3104},[3020,8909,4497],{"class":3425},[3020,8911,3334],{"class":3037},[3020,8913,4461],{"class":3371},[3020,8915,8916],{"class":3033}," product",[3020,8918,4507],{"class":3425},[3020,8920,8859],{"class":3033},[3020,8922,3089],{"class":3037},[3020,8924,8925],{"class":3022,"line":3121},[3020,8926,3069],{"class":3037},[3020,8928,8929,8932,8935,8937,8940],{"class":3022,"line":3138},[3020,8930,8931],{"class":3371},"    await",[3020,8933,8934],{"class":3046}," ProcessProductAsync",[3020,8936,3083],{"class":3037},[3020,8938,8939],{"class":3033},"product",[3020,8941,3308],{"class":3037},[3020,8943,8944],{"class":3022,"line":3152},[3020,8945,3533],{"class":3037},[3020,8947,8948],{"class":3022,"line":3158},[3020,8949,3494],{"emptyLinePlaceholder":3493},[3020,8951,8952],{"class":3022,"line":3172},[3020,8953,8954],{"class":3026},"// ✅ AsAsyncEnumerable: streaming (один рядок у RAM у будь-який момент)\n",[3020,8956,8957,8959,8962,8964,8966,8968,8970,8972,8974],{"class":3022,"line":3186},[3020,8958,4469],{"class":3371},[3020,8960,8961],{"class":3425}," foreach",[3020,8963,3334],{"class":3037},[3020,8965,4461],{"class":3371},[3020,8967,8916],{"class":3033},[3020,8969,4507],{"class":3425},[3020,8971,4472],{"class":3033},[3020,8973,3038],{"class":3037},[3020,8975,6306],{"class":3033},[3020,8977,8978,8980,8982,8984,8986,8988,8990,8992,8994],{"class":3022,"line":3517},[3020,8979,4949],{"class":3037},[3020,8981,6576],{"class":3046},[3020,8983,3083],{"class":3037},[3020,8985,2965],{"class":3033},[3020,8987,4815],{"class":3037},[3020,8989,2965],{"class":3033},[3020,8991,3038],{"class":3037},[3020,8993,6589],{"class":3033},[3020,8995,3089],{"class":3037},[3020,8997,8998,9000,9003],{"class":3022,"line":3530},[3020,8999,4949],{"class":3037},[3020,9001,9002],{"class":3046},"AsAsyncEnumerable",[3020,9004,9005],{"class":3037},"())\n",[3020,9007,9008],{"class":3022,"line":3536},[3020,9009,3069],{"class":3037},[3020,9011,9012,9014,9016,9018,9020,9022],{"class":3022,"line":3541},[3020,9013,8931],{"class":3371},[3020,9015,8934],{"class":3046},[3020,9017,3083],{"class":3037},[3020,9019,8939],{"class":3033},[3020,9021,8142],{"class":3037},[3020,9023,9024],{"class":3026},"// оброблено і звільнено з RAM\n",[3020,9026,9027],{"class":3022,"line":3572},[3020,9028,3533],{"class":3037},[3020,9030,9031],{"class":3022,"line":3577},[3020,9032,9033],{"class":3026},"// SQL: один запит, але результати читаються потоково\n",[3005,9035,9037],{"id":9036},"використання-asasyncenumerable","Використання AsAsyncEnumerable",[3010,9039,9041],{"className":3012,"code":9040,"language":3014,"meta":3015,"style":3015},"// Batch processing великих наборів через Chunking:\npublic async Task ProcessAllProductsAsync()\n{\n    const int batchSize = 1000;\n    var batch = new List\u003CProduct>(batchSize);\n\n    await foreach (var product in context.Products.AsAsyncEnumerable())\n    {\n        batch.Add(product);\n\n        if (batch.Count >= batchSize)\n        {\n            await ProcessBatchAsync(batch);\n            batch.Clear();   // Звільнити пам'ять\n        }\n    }\n\n    // Останній неповний батч:\n    if (batch.Count > 0)\n        await ProcessBatchAsync(batch);\n}\n\n// Трансформація і передача у Stream (HTTP Response Streaming):\n[HttpGet(\"products/export\")]\npublic async IAsyncEnumerable\u003CProductExportDto> ExportProducts()\n{\n    await foreach (var product in context.Products\n        .Where(p => p.IsActive)\n        .Select(p => new ProductExportDto { ... })\n        .AsAsyncEnumerable())\n    {\n        yield return product;  // передає клієнту по одному, без буфера!\n    }\n}\n",[3017,9042,9043,9048,9061,9065,9083,9108,9112,9138,9142,9158,9162,9181,9185,9199,9214,9218,9222,9226,9231,9249,9262,9266,9270,9275,9291,9312,9316,9336,9356,9376,9384,9388,9403,9407],{"__ignoreMap":3015},[3020,9044,9045],{"class":3022,"line":3023},[3020,9046,9047],{"class":3026},"// Batch processing великих наборів через Chunking:\n",[3020,9049,9050,9052,9054,9056,9059],{"class":3022,"line":3030},[3020,9051,3372],{"class":3371},[3020,9053,7988],{"class":3371},[3020,9055,7991],{"class":3053},[3020,9057,9058],{"class":3046}," ProcessAllProductsAsync",[3020,9060,3272],{"class":3037},[3020,9062,9063],{"class":3022,"line":3066},[3020,9064,3069],{"class":3037},[3020,9066,9067,9070,9073,9076,9078,9081],{"class":3022,"line":3072},[3020,9068,9069],{"class":3371},"    const",[3020,9071,9072],{"class":3371}," int",[3020,9074,9075],{"class":3033}," batchSize",[3020,9077,3957],{"class":3037},[3020,9079,9080],{"class":3970},"1000",[3020,9082,3942],{"class":3037},[3020,9084,9085,9087,9090,9092,9094,9097,9099,9101,9103,9106],{"class":3022,"line":3092},[3020,9086,8041],{"class":3371},[3020,9088,9089],{"class":3033}," batch",[3020,9091,3957],{"class":3037},[3020,9093,3472],{"class":3371},[3020,9095,9096],{"class":3053}," List",[3020,9098,3050],{"class":3037},[3020,9100,5130],{"class":3053},[3020,9102,3057],{"class":3037},[3020,9104,9105],{"class":3033},"batchSize",[3020,9107,3308],{"class":3037},[3020,9109,9110],{"class":3022,"line":3104},[3020,9111,3494],{"emptyLinePlaceholder":3493},[3020,9113,9114,9116,9118,9120,9122,9124,9126,9128,9130,9132,9134,9136],{"class":3022,"line":3121},[3020,9115,8931],{"class":3371},[3020,9117,8961],{"class":3425},[3020,9119,3334],{"class":3037},[3020,9121,4461],{"class":3371},[3020,9123,8916],{"class":3033},[3020,9125,4507],{"class":3425},[3020,9127,4472],{"class":3033},[3020,9129,3038],{"class":3037},[3020,9131,4853],{"class":3033},[3020,9133,3038],{"class":3037},[3020,9135,9002],{"class":3046},[3020,9137,9005],{"class":3037},[3020,9139,9140],{"class":3022,"line":3138},[3020,9141,3420],{"class":3037},[3020,9143,9144,9147,9149,9152,9154,9156],{"class":3022,"line":3152},[3020,9145,9146],{"class":3033},"        batch",[3020,9148,3038],{"class":3037},[3020,9150,9151],{"class":3046},"Add",[3020,9153,3083],{"class":3037},[3020,9155,8939],{"class":3033},[3020,9157,3308],{"class":3037},[3020,9159,9160],{"class":3022,"line":3158},[3020,9161,3494],{"emptyLinePlaceholder":3493},[3020,9163,9164,9166,9168,9171,9173,9175,9177,9179],{"class":3022,"line":3172},[3020,9165,3426],{"class":3046},[3020,9167,3334],{"class":3037},[3020,9169,9170],{"class":3033},"batch",[3020,9172,3038],{"class":3037},[3020,9174,4858],{"class":3033},[3020,9176,4082],{"class":3037},[3020,9178,9105],{"class":3033},[3020,9180,3089],{"class":3037},[3020,9182,9183],{"class":3022,"line":3186},[3020,9184,3457],{"class":3037},[3020,9186,9187,9190,9193,9195,9197],{"class":3022,"line":3517},[3020,9188,9189],{"class":3371},"            await",[3020,9191,9192],{"class":3046}," ProcessBatchAsync",[3020,9194,3083],{"class":3037},[3020,9196,9170],{"class":3033},[3020,9198,3308],{"class":3037},[3020,9200,9201,9204,9206,9209,9211],{"class":3022,"line":3530},[3020,9202,9203],{"class":3033},"            batch",[3020,9205,3038],{"class":3037},[3020,9207,9208],{"class":3046},"Clear",[3020,9210,6360],{"class":3037},[3020,9212,9213],{"class":3026},"// Звільнити пам'ять\n",[3020,9215,9216],{"class":3022,"line":3536},[3020,9217,3483],{"class":3037},[3020,9219,9220],{"class":3022,"line":3541},[3020,9221,3488],{"class":3037},[3020,9223,9224],{"class":3022,"line":3572},[3020,9225,3494],{"emptyLinePlaceholder":3493},[3020,9227,9228],{"class":3022,"line":3577},[3020,9229,9230],{"class":3026},"    // Останній неповний батч:\n",[3020,9232,9233,9235,9237,9239,9241,9243,9245,9247],{"class":3022,"line":3606},[3020,9234,8106],{"class":3425},[3020,9236,3334],{"class":3037},[3020,9238,9170],{"class":3033},[3020,9240,3038],{"class":3037},[3020,9242,4858],{"class":3033},[3020,9244,7686],{"class":3037},[3020,9246,6914],{"class":3970},[3020,9248,3089],{"class":3037},[3020,9250,9251,9254,9256,9258,9260],{"class":3022,"line":3611},[3020,9252,9253],{"class":3371},"        await",[3020,9255,9192],{"class":3046},[3020,9257,3083],{"class":3037},[3020,9259,9170],{"class":3033},[3020,9261,3308],{"class":3037},[3020,9263,9264],{"class":3022,"line":3617},[3020,9265,3533],{"class":3037},[3020,9267,9268],{"class":3022,"line":3647},[3020,9269,3494],{"emptyLinePlaceholder":3493},[3020,9271,9272],{"class":3022,"line":3652},[3020,9273,9274],{"class":3026},"// Трансформація і передача у Stream (HTTP Response Streaming):\n",[3020,9276,9277,9280,9283,9285,9288],{"class":3022,"line":3680},[3020,9278,9279],{"class":3037},"[",[3020,9281,9282],{"class":3053},"HttpGet",[3020,9284,3083],{"class":3037},[3020,9286,9287],{"class":3285},"\"products/export\"",[3020,9289,9290],{"class":3037},")]\n",[3020,9292,9293,9295,9297,9300,9302,9305,9307,9310],{"class":3022,"line":3745},[3020,9294,3372],{"class":3371},[3020,9296,7988],{"class":3371},[3020,9298,9299],{"class":3053}," IAsyncEnumerable",[3020,9301,3050],{"class":3037},[3020,9303,9304],{"class":3053},"ProductExportDto",[3020,9306,3936],{"class":3037},[3020,9308,9309],{"class":3046},"ExportProducts",[3020,9311,3272],{"class":3037},[3020,9313,9314],{"class":3022,"line":3750},[3020,9315,3069],{"class":3037},[3020,9317,9318,9320,9322,9324,9326,9328,9330,9332,9334],{"class":3022,"line":3755},[3020,9319,8931],{"class":3371},[3020,9321,8961],{"class":3425},[3020,9323,3334],{"class":3037},[3020,9325,4461],{"class":3371},[3020,9327,8916],{"class":3033},[3020,9329,4507],{"class":3425},[3020,9331,4472],{"class":3033},[3020,9333,3038],{"class":3037},[3020,9335,6306],{"class":3033},[3020,9337,9338,9340,9342,9344,9346,9348,9350,9352,9354],{"class":3022,"line":3761},[3020,9339,5113],{"class":3037},[3020,9341,6576],{"class":3046},[3020,9343,3083],{"class":3037},[3020,9345,2965],{"class":3033},[3020,9347,4815],{"class":3037},[3020,9349,2965],{"class":3033},[3020,9351,3038],{"class":3037},[3020,9353,6589],{"class":3033},[3020,9355,3089],{"class":3037},[3020,9357,9358,9360,9362,9364,9366,9368,9370,9373],{"class":3022,"line":3781},[3020,9359,5113],{"class":3037},[3020,9361,4807],{"class":3046},[3020,9363,3083],{"class":3037},[3020,9365,2965],{"class":3033},[3020,9367,4815],{"class":3037},[3020,9369,3472],{"class":3371},[3020,9371,9372],{"class":3053}," ProductExportDto",[3020,9374,9375],{"class":3037}," { ... })\n",[3020,9377,9378,9380,9382],{"class":3022,"line":3786},[3020,9379,5113],{"class":3037},[3020,9381,9002],{"class":3046},[3020,9383,9005],{"class":3037},[3020,9385,9386],{"class":3022,"line":3807},[3020,9387,3420],{"class":3037},[3020,9389,9390,9393,9396,9398,9400],{"class":3022,"line":3812},[3020,9391,9392],{"class":3033},"        yield",[3020,9394,9395],{"class":3033}," return",[3020,9397,8916],{"class":3033},[3020,9399,7372],{"class":3037},[3020,9401,9402],{"class":3026},"// передає клієнту по одному, без буфера!\n",[3020,9404,9405],{"class":3022,"line":3817},[3020,9406,3488],{"class":3037},[3020,9408,9409],{"class":3022,"line":3822},[3020,9410,3533],{"class":3037},[9412,9413,9414,9416,9417,9420],"warning",{},[3017,9415,8841],{}," тримає ",[2969,9418,9419],{},"з'єднання з БД відкритим"," протягом всього часу ітерації. Якщо обробка кожного елементу займає 100ms, а у базі 100K рядків — з'єднання відкрите 10,000 секунд! Використовуйте лише для швидкої streaming-обробки або export сценаріїв. Для складної обробки — краще Offset pagination з батчами.",[2991,9422],{},[2960,9424,9426],{"id":9425},"практичні-завдання-частина-1","Практичні завдання (Частина 1)",[3005,9428,9430],{"id":9429},"рівень-1-базовий","Рівень 1 — Базовий",[9432,9433,9434,9438,9572,9576,9579,9598,9602,9605],"steps",{},[3005,9435,9437],{"id":9436},"завдання-11-виявлення-n1","Завдання 1.1: Виявлення N+1",[9439,9440,9441,9447,9563,9569],"ol",{},[5121,9442,9443,9444],{},"Увімкніть SQL logging: ",[3017,9445,9446],{},"LogTo(Console.WriteLine, LogLevel.Information)",[5121,9448,9449,9450],{},"Напишіть наступний код і порахуйте кількість SQL запитів:\n",[3010,9451,9453],{"className":3012,"code":9452,"language":3014,"meta":3015,"style":3015},"var categories = await context.Categories.ToListAsync();\nvar result = categories.Select(c => new {\n    c.Name,\n    Products = context.Products.Where(p => p.CategoryId == c.Id).ToList()\n}).ToList();\n",[3017,9454,9455,9477,9502,9512,9555],{"__ignoreMap":3015},[3020,9456,9457,9459,9461,9463,9465,9467,9469,9471,9473,9475],{"class":3022,"line":3023},[3020,9458,4461],{"class":3371},[3020,9460,4761],{"class":3033},[3020,9462,3957],{"class":3037},[3020,9464,4469],{"class":3371},[3020,9466,4472],{"class":3033},[3020,9468,3038],{"class":3037},[3020,9470,4772],{"class":3033},[3020,9472,3038],{"class":3037},[3020,9474,4482],{"class":3046},[3020,9476,4892],{"class":3037},[3020,9478,9479,9481,9483,9485,9487,9489,9491,9493,9495,9497,9499],{"class":3022,"line":3030},[3020,9480,4461],{"class":3371},[3020,9482,4060],{"class":3033},[3020,9484,3957],{"class":3037},[3020,9486,4802],{"class":3033},[3020,9488,3038],{"class":3037},[3020,9490,4807],{"class":3046},[3020,9492,3083],{"class":3037},[3020,9494,4812],{"class":3033},[3020,9496,4815],{"class":3037},[3020,9498,3472],{"class":3371},[3020,9500,9501],{"class":3037}," {\n",[3020,9503,9504,9506,9508,9510],{"class":3022,"line":3066},[3020,9505,4827],{"class":3033},[3020,9507,3038],{"class":3037},[3020,9509,3436],{"class":3033},[3020,9511,4042],{"class":3037},[3020,9513,9514,9517,9519,9521,9523,9525,9527,9529,9531,9533,9535,9537,9539,9541,9543,9545,9547,9549,9551,9553],{"class":3022,"line":3072},[3020,9515,9516],{"class":3033},"    Products",[3020,9518,3957],{"class":3037},[3020,9520,4848],{"class":3033},[3020,9522,3038],{"class":3037},[3020,9524,4853],{"class":3033},[3020,9526,3038],{"class":3037},[3020,9528,6576],{"class":3046},[3020,9530,3083],{"class":3037},[3020,9532,2965],{"class":3033},[3020,9534,4815],{"class":3037},[3020,9536,2965],{"class":3033},[3020,9538,3038],{"class":3037},[3020,9540,4871],{"class":3033},[3020,9542,3439],{"class":3037},[3020,9544,4812],{"class":3033},[3020,9546,3038],{"class":3037},[3020,9548,4544],{"class":3033},[3020,9550,8699],{"class":3037},[3020,9552,4889],{"class":3046},[3020,9554,3272],{"class":3037},[3020,9556,9557,9559,9561],{"class":3022,"line":3092},[3020,9558,4886],{"class":3037},[3020,9560,4889],{"class":3046},[3020,9562,4892],{"class":3037},[5121,9564,9565,9566,9568],{},"Виправте через ",[3017,9567,4917],{}," або Projection",[5121,9570,9571],{},"Порівняйте кількість запитів і час виконання",[3005,9573,9575],{"id":9574},"завдання-12-projection-vs-include","Завдання 1.2: Projection vs Include",[2965,9577,9578],{},"Для запиту «список замовлень з ім'ям клієнта і кількістю позицій»:",[9439,9580,9581,9588,9595],{},[5121,9582,9583,9584,9587],{},"Версія A: ",[3017,9585,9586],{},"Include(o => o.Customer).Include(o => o.LineItems)"," → виміряйте час і RAM",[5121,9589,9590,9591,9594],{},"Версія B: ",[3017,9592,9593],{},"Select(o => new { o.Id, CustomerName = o.Customer.Name, ItemCount = o.LineItems.Count() })"," → виміряйте",[5121,9596,9597],{},"Порівняйте згенерований SQL (кількість стовпців, JOIN, GROUP BY)",[3005,9599,9601],{"id":9600},"завдання-13-count-vs-any-бенчмарк","Завдання 1.3: Count vs Any бенчмарк",[2965,9603,9604],{},"Для таблиці з 100K записів:",[9439,9606,9607,9612,9617,9620],{},[5121,9608,9609,9611],{},[3017,9610,6843],{}," → виміряйте час (Console.Stopwatch)",[5121,9613,9614,9616],{},[3017,9615,6847],{}," → виміряйте час",[5121,9618,9619],{},"Подивіться EXPLAIN ANALYZE (PostgreSQL) або Estimated Execution Plan (SQL Server)",[5121,9621,9622],{},"В якому випадку різниця найбільша: мало або багато записів?",[3005,9624,9626],{"id":9625},"рівень-2-логіка","Рівень 2 — Логіка",[9432,9628,9629,9633,9650,9654,9660,9680,9684,9689],{},[3005,9630,9632],{"id":9631},"завдання-21-splitquery-дослідження","Завдання 2.1: SplitQuery дослідження",[9439,9634,9635,9638,9641,9647],{},[5121,9636,9637],{},"Завантажте Orders → Include(Customer) → Include(LineItems → Product) — Single Query",[5121,9639,9640],{},"Подивіться кількість рядків у результаті (Cartesian!)",[5121,9642,9643,9644,9646],{},"Те саме з ",[3017,9645,5254],{}," — порахуйте кількість SQL запитів",[5121,9648,9649],{},"Виміряйте час для обох при 1000 Orders × 10 LineItems кожне",[3005,9651,9653],{"id":9652},"завдання-22-keyset-pagination","Завдання 2.2: Keyset Pagination",[2965,9655,9656,9657,3712],{},"Реалізуйте endpoint ",[3017,9658,9659],{},"/api/orders?cursor=...&pageSize=20",[9439,9661,9662,9668,9674,9677],{},[5121,9663,9664,9665,9667],{},"Перша сторінка: ",[3017,9666,8020],{}," відсутній",[5121,9669,9670,9671],{},"Наступна: ",[3017,9672,9673],{},"cursor = base64(lastItem.PlacedAt + lastItem.Id)",[5121,9675,9676],{},"Перевірте: EXPLAIN показує Index Seek (не Scan) для Keyset",[5121,9678,9679],{},"Порівняйте performance при cursor=page1 і cursor=page1000 — чи є різниця?",[3005,9681,9683],{"id":9682},"завдання-23-slowquerylogginginterceptor","Завдання 2.3: SlowQueryLoggingInterceptor",[2965,9685,9686,9687,3712],{},"Реалізуйте та зареєструйте ",[3017,9688,3933],{},[9439,9690,9691,9694,9697,9704],{},[5121,9692,9693],{},"Threshold: 200ms для unit тестів, 500ms для production",[5121,9695,9696],{},"Логувати: SQL текст, параметри, час виконання, stack trace (!!)",[5121,9698,9699,9700,9703],{},"Відправляти метрику у ",[3017,9701,9702],{},"IMetrics"," (можна через простий counter)",[5121,9705,9706],{},"Написати тест що перевіряє: повільний запит → logger отримує Warning",[3005,9708,9710],{"id":9709},"рівень-3-архітектура","Рівень 3 — Архітектура",[9432,9712,9713,9717,9720,9734],{},[3005,9714,9716],{"id":9715},"завдання-31-performance-audit-middleware","Завдання 3.1: Performance Audit Middleware",[2965,9718,9719],{},"Реалізуйте ASP.NET Core Middleware що:",[9439,9721,9722,9725,9728,9731],{},[5121,9723,9724],{},"Перед кожним HTTP запитом — встановлює counter запитів до БД (через DiagnosticListener)",[5121,9726,9727],{},"Після — логує: URL, HTTP метод, кількість DB запитів, загальний час DB, загальний час HTTP",[5121,9729,9730],{},"Якщо DB запитів > 10 → LogWarning \"Potential N+1 detected\"",[5121,9732,9733],{},"Якщо загальний DB час > 1000ms → LogWarning \"Slow request\"",[2965,9735,9736,9737],{},"Формат логу: ",[3017,9738,9739],{},"GET /api/orders → 200 OK | DB: 3 queries, 45ms | Total: 120ms",[2991,9741],{},[2960,9743,9745],{"id":9744},"підсумок-частини-1","Підсумок частини 1",[9747,9748,9749,9765,9775,9780,9788,9796,9812,9826],"ul",{},[5121,9750,9751,9754,9755,3289,9758,9761,9762,9764],{},[2969,9752,9753],{},"SQL Logging",": обов'язковий інструмент. ",[3017,9756,9757],{},"LogTo()",[3017,9759,9760],{},"EnableSensitiveDataLogging()",". ",[3017,9763,3933],{}," для автоматичного виявлення",[5121,9766,9767,9769,9770,9772,9773],{},[2969,9768,5621],{},": 1 запит для батьківської + N для child. Виявляється через логи. Вирішення: ",[3017,9771,4917],{},", Projection, або ",[3017,9774,5351],{},[5121,9776,9777,9779],{},[2969,9778,5513],{},": вирішує Cartesian Explosion при кількох Include колекцій — окремий SQL для кожної",[5121,9781,9782,4549,9785,9787],{},[2969,9783,9784],{},"Projection",[3017,9786,4807],{}," лише потрібних полів → менше даних через мережу, менше пам'яті, без трекінгу",[5121,9789,9790,9792,9793,9795],{},[2969,9791,6277],{},": ~30-40% швидше для read-only запитів. ",[3017,9794,6603],{}," для де-дублювання",[5121,9797,9798,4549,9801,9803,9804,9807,9808,9811],{},[2969,9799,9800],{},"Count vs Any",[3017,9802,6847],{}," використовує ",[3017,9805,9806],{},"EXISTS"," — зупиняється на першому знайденому. ",[3017,9809,9810],{},"Count()"," сканує все",[5121,9813,9814,9817,9818,9821,9822,9825],{},[2969,9815,9816],{},"Pagination",": Offset (",[3017,9819,9820],{},"Skip/Take",") — простий, але сповільнюється лінійно. Keyset (",[3017,9823,9824],{},"WHERE Id > lastId",") — завжди O(log n) з індексом",[5121,9827,9828,4549,9831,9833],{},[2969,9829,9830],{},"Streaming",[3017,9832,8841],{}," для великих export без завантаження у RAM. Але тримає з'єднання відкритим",[2965,9835,9836,9841],{},[9837,9838,9840],"a",{"href":9839},"/csharp/ef-core/26.performance-fundamentals-part2","У другій частині"," — Compiled Queries, DbContext Pooling, ExecuteUpdate / ExecuteDelete, MaxBatchSize та Memory Management у Change Tracker.",[9843,9844,9845],"style",{},"html pre.shiki code .spJ8K, html code.shiki .spJ8K{--shiki-light:#008000;--shiki-default:#6A9955;--shiki-dark:#6A9955}html pre.shiki code .siwwj, html code.shiki .siwwj{--shiki-light:#001080;--shiki-default:#9CDCFE;--shiki-dark:#9CDCFE}html pre.shiki code .sHH4Y, html code.shiki .sHH4Y{--shiki-light:#000000;--shiki-default:#D4D4D4;--shiki-dark:#D4D4D4}html pre.shiki code .s8Opu, html code.shiki .s8Opu{--shiki-light:#795E26;--shiki-default:#DCDCAA;--shiki-dark:#DCDCAA}html pre.shiki code .sN1BT, html code.shiki .sN1BT{--shiki-light:#267F99;--shiki-default:#4EC9B0;--shiki-dark:#4EC9B0}html .light .shiki span {color: var(--shiki-light);background: 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