# Зависимости в декораторах операции пути { #dependencies-in-path-operation-decorators }

В некоторых случаях, возвращаемое значение зависимости не используется внутри *функции операции пути*.

Или же зависимость не возвращает никакого значения.

Но вам всё-таки нужно, чтобы она выполнилась.

Для таких ситуаций, вместо объявления *функции операции пути* с параметром `Depends`, вы можете добавить список зависимостей `dependencies` в *декоратор операции пути*.

# 路徑操作裝飾器中的依賴 { #dependencies-in-path-operation-decorators }

有時在你的路徑操作函式中，其實不需要某個依賴的回傳值。

或是該依賴根本沒有回傳值。

但你仍需要它被執行／解析。

這種情況下，你可以不在路徑操作函式的參數上使用 `Depends`，而是在路徑操作裝飾器加入一個 `dependencies` 的 `list`。

## 在路徑操作裝飾器加入 `dependencies` { #add-dependencies-to-the-path-operation-decorator }

路徑操作裝飾器可接受一個可選參數 `dependencies`。

它應該是由 `Depends()` 組成的 `list`：

{* ../../docs_src/dependencies/tutorial006_an_py310.py hl[19] *}

In that case, they will be applied to all the *path operations* in the application:

{* ../../docs_src/dependencies/tutorial012_an_py310.py hl[17] *}

# Path Operation Configuration { #path-operation-configuration }

There are several parameters that you can pass to your *path operation decorator* to configure it.

/// warning

Notice that these parameters are passed directly to the *path operation decorator*, not to your *path operation function*.

///

## Response Status Code { #response-status-code }

You can define the (HTTP) `status_code` to be used in the response of your *path operation*.

                *path operation*.

                Read more about it in the
                [FastAPI docs for Dependencies in path operation decorators](https://fastapi.tiangolo.com/tutorial/dependencies/dependencies-in-path-operation-decorators/).
                """
            ),
        ] = None,
        summary: Annotated[
            str | None,
            Doc(
                """

* [`@contextlib.asynccontextmanager`](https://docs.python.org/3/library/contextlib.html#contextlib.asynccontextmanager)

would be valid to use as a **FastAPI** dependency.

In fact, FastAPI uses those two decorators internally.

///

## A database dependency with `yield` { #a-database-dependency-with-yield }

For example, you could use this to create a database session and close it after finishing.

                *path operation*.

                Read more about it in the
                [FastAPI docs for Dependencies in path operation decorators](https://fastapi.tiangolo.com/tutorial/dependencies/dependencies-in-path-operation-decorators/).
                """
            ),
        ] = None,
        summary: Annotated[
            str | None,
            Doc(
                """

## Additional Response with `model` { #additional-response-with-model }

You can pass to your *path operation decorators* a parameter `responses`.

It receives a `dict`: the keys are status codes for each response (like `200`), and the values are other `dict`s with the information for each of them.

## `Security` in decorator `dependencies` { #security-in-decorator-dependencies }

This might all sound abstract. Don't worry. You'll see all this in action in the [Tutorial - User Guide](tutorial/index.md).

The important thing is that by using standard Python types, in a single place (instead of adding more classes, decorators, etc), **FastAPI** will do a lot of the work for you.

/// info