## Instance'ı dependency olarak kullanma { #use-the-instance-as-a-dependency }

Sonra `Depends(FixedContentQueryChecker)` yerine `Depends(checker)` içinde bu `checker`'ı kullanabiliriz. Çünkü dependency, class'ın kendisi değil, `checker` instance'ıdır.

Ve dependency çözülürken **FastAPI** bu `checker`'ı şöyle çağırır:

```Python

## Используем экземпляр как зависимость { #use-the-instance-as-a-dependency }

Затем мы можем использовать этот `checker` в `Depends(checker)` вместо `Depends(FixedContentQueryChecker)`, потому что зависимостью является экземпляр `checker`, а не сам класс.

И при разрешении зависимости **FastAPI** вызовет `checker` примерно так:

```Python
checker(q="somequery")

     * file.
     */
    public static final String MSG_JAVADOC_MISSING = "javadoc.missing";

    /** Specify the visibility scope where Javadoc comments are checked. */
    private Scope scope = Scope.PUBLIC;

    /** Specify the visibility scope where Javadoc comments are not checked. */
    private Scope excludeScope;

    /** Specify pattern for types to ignore. */
    private Pattern ignorePattern = Pattern.compile("^$");

    /**

	if err := DB.Create(&pet).Error; err != nil {
		t.Fatalf("errors happened when create: %v", err)
	}

	CheckPet(t, pet, pet)

	// Find
	var pet2 Pet
	DB.Find(&pet2, "id = ?", pet.ID)
	DB.Model(&pet2).Association("Toy").Find(&pet2.Toy)
	CheckPet(t, pet2, pet)

	// Count
	AssertAssociationCount(t, pet, "Toy", 1, "")

	// Append
	toy := Toy{Name: "toy-has-one-append"}

not use beta APIs, unless you [repackage] them. **If your
code is a library, we strongly recommend using the [Guava Beta Checker] to
ensure that you do not use any `@Beta` APIs!**

[Guava Beta Checker]: https://github.com/google/guava-beta-checker

<!-- References -->

		}

		var pet2 Pet
		DB.Preload("Toy").Find(&pet2, "id = ?", pet.ID)
		CheckPet(t, pet2, pet)

		pet.Toy.Name += "new"
		if err := DB.Save(&pet).Error; err != nil {
			t.Fatalf("errors happened when update: %v", err)
		}

		var pet3 Pet
		DB.Preload("Toy").Find(&pet3, "id = ?", pet.ID)
		CheckPet(t, pet2, pet3)

   * new value.
   *
   * <p>If the cache loader associated with this cache is known not to throw checked exceptions,
   * then prefer {@link #getUnchecked} over this method.
   *
   * @throws ExecutionException if a checked exception was thrown while loading the value. ({@code
   *     ExecutionException} is thrown <a

## Utilize a instância como dependência { #use-the-instance-as-a-dependency }

Então, nós podemos utilizar este `checker` em um `Depends(checker)`, no lugar de `Depends(FixedContentQueryChecker)`, porque a dependência é a instância, `checker`, e não a própria classe.

E quando a dependência for resolvida, o **FastAPI** chamará este `checker` como:

```Python
checker(q="somequery")

    def __call__(self, q: str = ""):
        if q:
            return self.fixed_content in q
        return False


checker = FixedContentQueryChecker("bar")


@app.get("/query-checker/")
async def read_query_check(fixed_content_included: Annotated[bool, Depends(checker)]):

          <item index="10" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableDecl" />
          <item index="11" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableType" />
          <item index="12" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.qual.Nullable" />