/// note | 注意

请注意，你必须直接使用 `FileResponse` 返回图片。

///

/// info | 信息

除非你在 `responses` 参数中明确指定不同的媒体类型，否则 FastAPI 会假设响应与主响应类具有相同的媒体类型（默认是 `application/json`）。

但是如果你指定了一个媒体类型为 `None` 的自定义响应类，FastAPI 会对任何具有关联模型的附加响应使用 `application/json`。

///

## 组合信息 { #combining-information }

你也可以把来自多个位置的响应信息组合在一起，包括 `response_model`、`status_code` 和 `responses` 参数。

這不是 **FastAPI** 的限制，而是 HTTP 協定本身的規範。

///

## 可選的檔案上傳 { #optional-file-upload }

可透過一般型別註解並將預設值設為 `None` 使檔案成為可選：

{* ../../docs_src/request_files/tutorial001_02_an_py310.py hl[9,17] *}

## `UploadFile` 搭配額外中繼資料 { #uploadfile-with-additional-metadata }

你也可以在 `UploadFile` 上搭配 `File()`，例如用來設定額外的中繼資料：

            this.distFile = distFile;
            this.expandedDistDir = expandedDistDir;
        }
    }

    public abstract class BwcTaskThrottle implements BuildService<BuildServiceParameters.None> {}

   ...

app = FastAPI()


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None


@app.put("/items/{item_id}")
async def update_item(
    *,
    item_id: int = Path(title="The ID of the item to get", ge=0, le=1000),
    q: str | None = None,
    item: Item | None = None,
):
    results = {"item_id": item_id}
    if q:
        results.update({"q": q})

app = FastAPI()


@app.post("/urlencoded")
async def post_url_encoded(age: Annotated[int | None, Form()] = None):
    return age


@app.post("/multipart")
async def post_multi_part(
    age: Annotated[int | None, Form()] = None,
    file: Annotated[bytes | None, File()] = None,
):
    return {"file": file, "age": age}


client = TestClient(app)


def test_form_default_url_encoded():

            "axisLabel": "",
            "axisPlacement": "auto",
            "barAlignment": 0,
            "drawStyle": "line",
            "fillOpacity": 10,
            "gradientMode": "none",
            "hideFrom": {
              "legend": false,
              "tooltip": false,
              "viz": false
            },
            "insertNulls": false,
            "lineInterpolation": "linear",

    openapi_version: str = "3.1.0",
    summary: str | None = None,
    description: str | None = None,
    routes: Sequence[BaseRoute],
    webhooks: Sequence[BaseRoute] | None = None,
    tags: list[dict[str, Any]] | None = None,
    servers: list[dict[str, str | Any]] | None = None,
    terms_of_service: str | None = None,
    contact: dict[str, str | Any] | None = None,
    license_info: dict[str, str | Any] | None = None,

## List of buckets to be created after minio install
##
buckets:
  []
  #   # Name of the bucket
  # - name: bucket1
  #   # Policy to be set on the
  #   # bucket [none|download|upload|public]
  #   policy: none
  #   # Purge if bucket exists already
  #   purge: false
  #   # set versioning for
  #   # bucket [true|false]
  #   versioning: false # remove this key if you do not want versioning feature

    age: int | None = Field(default=None, index=True)


class Hero(HeroBase, table=True):
    id: int | None = Field(default=None, primary_key=True)
    secret_name: str


class HeroPublic(HeroBase):
    id: int


class HeroCreate(HeroBase):
    secret_name: str


class HeroUpdate(HeroBase):
    name: str | None = None
    age: int | None = None
    secret_name: str | None = None