## Объявление атрибутов модели

Вы можете использовать функцию `Field` с атрибутами модели:

=== "Python 3.10+"

    ```Python hl_lines="9-12"
    {!> ../../../docs_src/body_fields/tutorial001_py310.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="11-14"
    {!> ../../../docs_src/body_fields/tutorial001.py!}
    ```

Nicht die Klasse selbst (die bereits aufrufbar ist), sondern eine Instanz dieser Klasse.

Dazu deklarieren wir eine Methode `__call__`:

=== "Python 3.9+"

    ```Python hl_lines="12"
    {!> ../../../docs_src/dependencies/tutorial011_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="11"
    {!> ../../../docs_src/dependencies/tutorial011_an.py!}
    ```

ACCESS_TOKEN_EXPIRE_MINUTES = 30


fake_users_db = {
    "johndoe": {
        "username": "johndoe",
        "full_name": "John Doe",
        "email": "******@****.***",
        "hashed_password": "$2b$12$EixZaYVK1fsbw1ZfbX3OXePaWxn96p36WQoeG6Lruj3vjPGga31lW",
        "disabled": False,
    }
}


class Token(BaseModel):
    access_token: str
    token_type: str


class TokenData(BaseModel):

그리고 새로운 OpenAPI 3.1.0은 이 새로운 `examples` 필드가 포함된 최신 버전 (JSON 스키마 2020-12)을 기반으로 했습니다.

이제 새로운 `examples` 필드는 이전의 단일 (그리고 커스텀) `example` 필드보다 우선되며, `example`은 사용하지 않는 것이 좋습니다.

JSON 스키마의 새로운 `examples` 필드는 예제 속 **단순한 `list`**이며, (위에서 상술한 것처럼) OpenAPI의 다른 곳에 존재하는 dict으로 된 추가적인 메타데이터가 아닙니다.

ACCESS_TOKEN_EXPIRE_MINUTES = 30


fake_users_db = {
    "johndoe": {
        "username": "johndoe",
        "full_name": "John Doe",
        "email": "******@****.***",
        "hashed_password": "$2b$12$EixZaYVK1fsbw1ZfbX3OXePaWxn96p36WQoeG6Lruj3vjPGga31lW",
        "disabled": False,
    }
}


class Token(BaseModel):
    access_token: str
    token_type: str


class TokenData(BaseModel):

    ```

=== "Python 3.9+"

    ```Python hl_lines="11"
    {!> ../../../docs_src/header_params/tutorial002_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="12"
    {!> ../../../docs_src/header_params/tutorial002_an.py!}
    ```

=== "Python 3.10+ nicht annotiert"

    !!! tip "Tipp"
        Bevorzugen Sie die `Annotated`-Version, falls möglich.

```JSON
{
  "title": "towel",
  "size": "XL"
}
```

Você receberá uma *response* informando-o de que a data é inválida, e contendo o *body* recebido:

```JSON hl_lines="12-15"
{
  "detail": [
    {
      "loc": [
        "body",
        "size"
      ],
      "msg": "value is not a valid integer",
      "type": "type_error.integer"
    }
  ],
  "body": {

そこで、上で紹介した依存関係の`common_parameters`を`CommonQueryParams`クラスに変更します:

```Python hl_lines="11 12 13 14 15"
{!../../../docs_src/dependencies/tutorial002.py!}
```

クラスのインスタンスを作成するために使用される`__init__`メソッドに注目してください:

```Python hl_lines="12"
{!../../../docs_src/dependencies/tutorial002.py!}
```

...以前の`common_parameters`と同じパラメータを持っています:

```Python hl_lines="8"
{!../../../docs_src/dependencies/tutorial001.py!}
```

```

Поэтому ее можно использовать вместе с `Depends`.

### Использование

Теперь вы можете передать ваш `oauth2_scheme` в зависимость с помощью `Depends`.

=== "Python 3.9+"

    ```Python hl_lines="12"
    {!> ../../../docs_src/security/tutorial001_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python  hl_lines="11"
    {!> ../../../docs_src/security/tutorial001_an.py!}
    ```

Und dann basierte das neue OpenAPI 3.1.0 auf der neuesten Version (JSON Schema 2020-12), die dieses neue Feld `examples` enthielt.

Und jetzt hat dieses neue `examples`-Feld Vorrang vor dem alten (und benutzerdefinierten) `example`-Feld, im Singular, das jetzt deprecated ist.