## Adicione `dependencies` ao *decorador da operação de rota* { #add-dependencies-to-the-path-operation-decorator }

O *decorador da operação de rota* recebe um argumento opcional `dependencies`.

Ele deve ser uma lista de `Depends()`:

<img src="/img/tutorial/websockets/image03.png">

你可以傳送（與接收）多則訊息：

<img src="/img/tutorial/websockets/image04.png">

而且它們都會使用同一個 WebSocket 連線。

## 使用 `Depends` 與其他功能 { #using-depends-and-others }

在 WebSocket 端點中，你可以從 `fastapi` 匯入並使用：

* `Depends`
* `Security`
* `Cookie`
* `Header`
* `Path`
* `Query`

它們的運作方式與其他 FastAPI 端點/*路徑操作* 相同：

   *
   * <p><b>Warning: do not depend</b> on the behavior of this method.
   *
   * <p>Historically, {@code Supplier} instances in this library have implemented this method to
   * recognize certain cases where distinct {@code Supplier} instances would in fact behave
   * identically. However, as code migrates to {@code java.util.function}, that behavior will
   * disappear. It is best not to depend on it.
   */
  @Override

  }

  /**
   * Returns the minimum of the two values. If the values compare as 0, the first is returned.
   *
   * <p>The recommended solution for finding the {@code minimum} of some values depends on the type
   * of your data and the number of elements you have. Read more in the Guava User Guide article on
   * <a href="https://github.com/google/guava/wiki/CollectionUtilitiesExplained#comparators">{@code

## 注入目前使用者 { #inject-the-current-user }

現在我們可以在*路徑操作*中用相同的 `Depends` 來使用 `get_current_user`：

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

注意我們把 `current_user` 的型別宣告為 Pydantic 的 `User` 模型。

這能在函式內提供自動補全與型別檢查的協助。

/// tip | 提示

你可能記得，請求體也會用 Pydantic 模型宣告。

這裡因為你使用了 `Depends`，**FastAPI** 不會混淆。

///

/// check | 檢查

        self.dependant = get_dependant(
            path=self.path_format, call=self.endpoint, scope="function"
        )
        for depends in self.dependencies[::-1]:
            self.dependant.dependencies.insert(
                0,
                get_parameterless_sub_dependant(depends=depends, path=self.path_format),
            )
        self._flat_dependant = get_flat_dependant(self.dependant)

## `fastapi-slim`

⚠️ Do not install this package. ⚠️

This package, `fastapi-slim`, does nothing other than depend on `fastapi`.

All the functionality has been integrated into `fastapi`.

The only reason this package exists is as a migration path for old projects that used to depend on `fastapi-slim`, so that they can get the latest version of `fastapi`.

You **should not** install this package.

Install instead:

## `dependencies` zum *Pfadoperation-Dekorator* hinzufügen { #add-dependencies-to-the-path-operation-decorator }

Der *Pfadoperation-Dekorator* erhält ein optionales Argument `dependencies`.

Es sollte eine `list` von `Depends()` sein:

        // Apply the checkstyle plugin to create `checkstyleMain` and `checkstyleTest`. It only
        // creates them if there is main or test code to check and it makes `check` depend
        // on them. We also want `precommit` to depend on `checkstyle`.
        project.getPluginManager().apply("checkstyle");
        CheckstyleExtension checkstyle = project.getExtensions().getByType(CheckstyleExtension.class);

 *  Upgrade: [AndroidX Startup 1.2.0][startup_1_2_0]. The Android variant of the `okhttp` artifact
    now depends on this. This is a new dependency.

 *  Upgrade: [AndroidX Annotation 1.9.1][annotation_1_9_1]. As above, the Android variant of the
    `okhttp` artifact now depends on this. This is also a new dependency.


## Version 5.0.0-alpha.14

_2024-04-17_