// clear the joins after query because preload need it
	if v, ok := db.Statement.Clauses["FROM"].Expression.(clause.From); ok {
		fromClause := db.Statement.Clauses["FROM"]
		fromClause.Expression = clause.From{Tables: v.Tables, Joins: utils.RTrimSlice(v.Joins, len(db.Statement.Joins))} // keep the original From Joins
		db.Statement.Clauses["FROM"] = fromClause
	}

Et vous avez un **frontend** sur un autre domaine ou dans un chemin différent du même domaine (ou dans une application mobile).

Et vous voulez que le **frontend** puisse s'authentifier auprès du **backend**, en utilisant un **username** et un **password**.

Nous pouvons utiliser **OAuth2** pour construire cela avec **FastAPI**.

namespace gradients {
namespace internal {
namespace {
using std::vector;
using tensorflow::TF_StatusPtr;
using tracing::TracingOperation;

class CppGradients
    : public ::testing::TestWithParam<std::tuple<const char*, bool, bool>> {
 protected:
  void SetUp() override {
    TF_StatusPtr status(TF_NewStatus());
    TF_SetTracingImplementation(std::get<0>(GetParam()), status.get());

      call.eventListener.requestFailed(call, e)
      trackFailure(e)
      throw e
    }
  }

  @Throws(IOException::class)
  fun createRequestBody(
    request: Request,
    duplex: Boolean,
  ): Sink {
    this.isDuplex = duplex
    val contentLength = request.body!!.contentLength()
    call.eventListener.requestBodyStart(call)
    val rawRequestBody = codec.createRequestBody(request, contentLength)
    return RequestBodySink(

		return
	}

	DB.Migrator().DropTable(&City{}, &Museum{})

	if err = db.AutoMigrate(&City{}, &Museum{}); err != nil {
		t.Fatalf("failed to migrate countries & cities tables, got error: %v", err)
	}

	city := City{Name: "Amsterdam"}

	err = db.Create(&city).Error
	if err != nil {
		t.Fatalf("failed to create city: %v", err)
	}

* Automatische Dokumentation

## Spezielle Typen und Validierungen { #special-types-and-validation }

Abgesehen von normalen einfachen Typen wie `str`, `int`, `float`, usw. können Sie komplexere einfache Typen verwenden, die von `str` erben.

Um alle Optionen kennenzulernen, die Sie haben, schauen Sie sich [Pydantics Typübersicht](https://docs.pydantic.dev/latest/concepts/types/) an. Sie werden einige Beispiele im nächsten Kapitel kennenlernen.

   *
   * {@snippet :
   * for (B b0 : lists.get(0)) {
   *   for (B b1 : lists.get(1)) {
   *     ...
   *     ImmutableList<B> tuple = ImmutableList.of(b0, b1, ...);
   *     // operate on tuple
   *   }
   * }
   * }
   *
   * <p>Note that if any input list is empty, the Cartesian product will also be empty. If no lists

* Veri dönüştürme
* Veri doğrulama (validation)
* Otomatik dokümantasyon

## Özel tipler ve doğrulama { #special-types-and-validation }

`str`, `int`, `float` vb. normal tekil tiplerin yanında, `str`’den türeyen daha karmaşık tekil tipleri de kullanabilirsiniz.

Tüm seçenekleri görmek için [Pydantic Türlerine Genel Bakış](https://docs.pydantic.dev/latest/concepts/types/) sayfasına göz atın. Sonraki bölümde bazı örnekleri göreceksiniz.

* Валідацію даних
* Автоматичну документацію

## Спеціальні типи та валідація { #special-types-and-validation }

Окрім звичайних типів, таких як `str`, `int`, `float`, та ін. ви можете використовувати складніші типи, які наслідують `str`.

Щоб побачити всі доступні варіанти, ознайомтеся з [Оглядом типів у Pydantic](https://docs.pydantic.dev/latest/concepts/types/). Деякі приклади будуть у наступному розділі.

 * This job removes old crawling sessions, search logs, job logs, and user info logs
 * based on configured retention periods. It helps maintain system performance by
 * preventing log tables from growing too large.
 */
public class PurgeLogJob {

    /** Logger instance for this class */
    private static final Logger logger = LogManager.getLogger(PurgeLogJob.class);

    /**