{* ../../docs_src/security/tutorial002_an_py310.py hl[25] *}

## 获取用户 { #get-the-user }

`get_current_user` 使用创建的（伪）工具函数，该函数接收 `str` 类型的令牌，并返回 Pydantic 的 `User` 模型：

{* ../../docs_src/security/tutorial002_an_py310.py hl[19:22,26:27] *}

## 注入当前用户 { #inject-the-current-user }

在*路径操作* 的 `Depends` 中使用 `get_current_user`：

{* ../../docs_src/security/tutorial002_an_py310.py hl[31] *}

## Simple code includes { #simple-code-includes }

{* ../../docs_src/python_types/tutorial001_py310.py *}

{* ../../docs_src/python_types/tutorial002_py310.py *}


## Code includes with highlighting { #code-includes-with-highlighting }

{* ../../docs_src/python_types/tutorial002_py310.py hl[1] *}

{* ../../docs_src/python_types/tutorial006_py310.py hl[10] *}

{* ../../docs_src/dependencies/tutorial002_an_py310.py hl[11:15] *}

Pay attention to the `__init__` method used to create the instance of the class:

{* ../../docs_src/dependencies/tutorial002_an_py310.py hl[12] *}

...it has the same parameters as our previous `common_parameters`:

{* ../../docs_src/dependencies/tutorial001_an_py310.py hl[8] *}

但你可以用 `openapi_url` 參數來調整。

例如，將它設定為提供在 `/api/v1/openapi.json`：

{* ../../docs_src/metadata/tutorial002_py310.py hl[3] *}

如果你想完全停用 OpenAPI 綱要，可以設定 `openapi_url=None`，同時也會停用依賴它的文件使用者介面。

## 文件 URL { #docs-urls }

你可以設定內建的兩個文件使用者介面：

* Swagger UI：提供於 `/docs`。
    * 可用 `docs_url` 參數設定其 URL。
    * 設定 `docs_url=None` 可停用。
* ReDoc：提供於 `/redoc`。
    * 可用 `redoc_url` 參數設定其 URL。

**FastAPI**では関係ありません。パラメータは名前、型、デフォルトの宣言（`Query`、`Path`など）で検出され、順番は気にしません。

そのため、以下のように関数を宣言することができます:

{* ../../docs_src/path_params_numeric_validations/tutorial002_py310.py hl[7] *}

ただし、`Annotated`を使う場合はこの問題は起きないことを覚えておいてください。`Query()`や`Path()`に関数パラメータのデフォルト値を使わないためです。

{* ../../docs_src/path_params_numeric_validations/tutorial002_an_py310.py *}

## 必要に応じてパラメータを並び替えるトリック { #order-the-parameters-as-you-need-tricks }

{* ../../docs_src/body_updates/tutorial002_py310.py hl[32] *}

### Using Pydantic's `update` parameter { #using-pydantics-update-parameter }

Now, you can create a copy of the existing model using `.model_copy()`, and pass the `update` parameter with a `dict` containing the data to update.

Like `stored_item_model.model_copy(update=update_data)`:

{* ../../docs_src/body_updates/tutorial002_py310.py hl[33] *}

They can declare request requirements (like headers) or other sub-dependencies:

{* ../../docs_src/dependencies/tutorial006_an_py310.py hl[8,13] *}

### Raise exceptions { #raise-exceptions }

These dependencies can `raise` exceptions, the same as normal dependencies:

{* ../../docs_src/dependencies/tutorial006_an_py310.py hl[10,15] *}

### Return values { #return-values }

## `Header` 임포트 { #import-header }

먼저 `Header`를 임포트합니다:

{* ../../docs_src/header_params/tutorial001_an_py310.py hl[3] *}

## `Header` 매개변수 선언 { #declare-header-parameters }

`Path`, `Query` 그리고 `Cookie`를 사용한 동일한 구조를 이용하여 헤더 매개변수를 선언합니다.

첫 번째 값은 기본값이며, 추가 검증이나 어노테이션 매개변수 모두 전달할 수 있습니다:

{* ../../docs_src/header_params/tutorial001_an_py310.py hl[9] *}

/// note | 기술 세부사항

First, of course, you can mix `Path`, `Query` and request body parameter declarations freely and **FastAPI** will know what to do.

And you can also declare body parameters as optional, by setting the default to `None`:

{* ../../docs_src/body_multiple_params/tutorial001_an_py310.py hl[18:20] *}

/// note

Notice that, in this case, the `item` that would be taken from the body is optional. As it has a `None` default value.

///

```jinja hl_lines="4"
{!../../docs_src/templates/templates/item.html!}
```

In this example, it would link to a CSS file at `static/styles.css` with:

```CSS hl_lines="4"
{!../../docs_src/templates/static/styles.css!}
```