return name

    async def get_model_c() -> ModelC:
        return ModelC(username="test-user", password="test-password")

    @app.get("/model/{name}", response_model=ModelA)
    async def get_model_a(name: str, model_c=Depends(get_model_c)):
        return {
            "name": name,
            "description": "model-a-desc",
            "foo": model_c,

    "field (e.g. Union[Response, dict, None]) you can disable generating the "
    "response model from the type annotation with the path operation decorator "
    "parameter response_model=None. Read more: "
    "https://fastapi.tiangolo.com/tutorial/response-model/"
)


def create_model_field(
    name: str,
    type_: Any,
    class_validators: Optional[dict[str, Validator]] = None,

        expires_delta=access_token_expires,
    )
    return Token(access_token=access_token, token_type="bearer")


@app.get("/users/me/", response_model=User)
async def read_users_me(
    current_user: Annotated[User, Depends(get_current_active_user)],
):
    return current_user


@app.get("/users/me/items/")
async def read_own_items(

        expires_delta=access_token_expires,
    )
    return Token(access_token=access_token, token_type="bearer")


@app.get("/users/me/", response_model=User)
async def read_users_me(
    current_user: Annotated[User, Depends(get_current_active_user)],
):
    return current_user


@app.get("/users/me/items/")
async def read_own_items(

///

{* ../../docs_src/extra_models/tutorial003_py310.py hl[1,14:15,18:20,33] *}

### `Union` no Python 3.10 { #union-in-python-3-10 }

Neste exemplo, passamos `Union[PlaneItem, CarItem]` como o valor do argumento `response_model`.

Dado que estamos passando-o como um **valor para um argumento** em vez de colocá-lo em uma **anotação de tipo**, precisamos usar `Union` mesmo no Python 3.10.

    access_token = create_access_token(
        data={"sub": user.username}, expires_delta=access_token_expires
    )
    return Token(access_token=access_token, token_type="bearer")


@app.get("/users/me/", response_model=User)
async def read_users_me(
    current_user: Annotated[User, Depends(get_current_active_user)],
):
    return current_user


@app.get("/users/me/items/")
async def read_own_items(

        expires_delta=access_token_expires,
    )
    return Token(access_token=access_token, token_type="bearer")


@app.get("/users/me/", response_model=User)
async def read_users_me(current_user: User = Depends(get_current_active_user)):
    return current_user


@app.get("/users/me/items/")
async def read_own_items(

这个新的*表模型* `Hero` 会包含客户端发送的字段，以及一个由数据库生成的 `id` 。

然后我们将与函数中相同的*表模型* `Hero` 原样返回。但是由于我们使用 `HeroPublic` *数据模型*声明了 `response_model` ，**FastAPI** 会使用 `HeroPublic` 来验证和序列化数据。

{* ../../docs_src/sql_databases/tutorial002_an_py310.py ln[56:62] hl[56:58] *}

/// tip

现在我们使用 `response_model=HeroPublic` 来代替**返回类型注释** `-> HeroPublic` ，因为我们返回的值实际上**并不是** `HeroPublic` 类型。

But if you return a `Response` directly (or any subclass, like `JSONResponse`), the data won't be automatically converted (even if you declare a `response_model`), and the documentation won't be automatically generated (for example, including the specific "media type", in the HTTP header `Content-Type` as part of the generated OpenAPI).

Wenn Sie jedoch direkt eine `Response` (oder eine Unterklasse wie `JSONResponse`) zurückgeben, werden die Daten nicht automatisch konvertiert (selbst wenn Sie ein `response_model` deklariert haben), und die Dokumentation wird nicht automatisch generiert (zum Beispiel wird der spezifische „Medientyp“, der im HTTP-Header `Content-Type` angegeben ist, nicht Teil der generierten OpenAPI).