- [Confluence/Jira](https://github.com/codelibs/fess-ds-atlassian)
 - [Box](https://github.com/codelibs/fess-ds-box)
 - [CSV](https://github.com/codelibs/fess-ds-csv)
 - [Database](https://github.com/codelibs/fess-ds-db)
 - [Dropbox](https://github.com/codelibs/fess-ds-dropbox)
 - [Elasticsearch](https://github.com/codelibs/fess-ds-elasticsearch)
 - [Git](https://github.com/codelibs/fess-ds-git)

sería válida para usar como una dependencia en **FastAPI**.

De hecho, FastAPI usa esos dos decoradores internamente.

///

## Una dependencia de base de datos con `yield` { #a-database-dependency-with-yield }

Por ejemplo, podrías usar esto para crear una sesión de base de datos y cerrarla después de finalizar.

Solo el código anterior e incluyendo el `yield` statement se ejecuta antes de crear un response:

    //                                                                      ==============
    /**
     * Creates a new access context arranger for database operations.
     * This method provides a dummy implementation as Fess does not use DBFlute extensively.
     *
     * @return a new access context arranger
     */
    @Override

				db.AddError(err)
			}
			return
		}

		// append @id column with value for auto-increment primary key
		// the @id value is correct, when: 1. without setting auto-increment primary key, 2. database AutoIncrementIncrement = 1
		switch values := db.Statement.Dest.(type) {
		case map[string]interface{}:
			values[pkFieldName] = insertID
		case *map[string]interface{}:
			(*values)[pkFieldName] = insertID

### Multiple Applications { #multiple-applications }

In the same server (or servers), there could be **multiple applications**, for example, other API programs or a database.

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

都可以作为 **FastAPI** 的依赖项。

实际上，FastAPI 在内部就是用的这两个装饰器。

///

## 使用 `yield` 的数据库依赖项 { #a-database-dependency-with-yield }

例如，你可以用这种方式创建一个数据库会话，并在完成后将其关闭。

在创建响应之前，只会执行 `yield` 语句及其之前的代码：

{* ../../docs_src/dependencies/tutorial007_py310.py hl[2:4] *}

`yield` 产生的值会注入到 *路径操作* 和其他依赖项中：

 - [Confluence/Jira](https://github.com/codelibs/fess-ds-atlassian)
 - [Box](https://github.com/codelibs/fess-ds-box)
 - [CSV](https://github.com/codelibs/fess-ds-csv)
 - [Database](https://github.com/codelibs/fess-ds-db)
 - [Dropbox](https://github.com/codelibs/fess-ds-dropbox)
 - [Elasticsearch](https://github.com/codelibs/fess-ds-elasticsearch)
 - [Git](https://github.com/codelibs/fess-ds-git)

  ) {
    withLock {
      allocationLimit = settings.getMaxConcurrentStreams()
    }
  }

  override fun handshake(): Handshake? = handshake

  /** Track a bad route in the route database. Other routes will be attempted first. */
  internal fun connectFailed(
    client: OkHttpClient,
    failedRoute: Route,
    failure: IOException,
  ) {

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

都可以作為 **FastAPI** 的相依。

事實上，FastAPI 內部就是使用這兩個裝飾器。

///

## 使用 `yield` 的資料庫相依 { #a-database-dependency-with-yield }

例如，你可以用它建立一個資料庫 session，並在完成後關閉。

只有 `yield` 之前（含 `yield` 本身）的程式碼會在產生回應之前執行：

{* ../../docs_src/dependencies/tutorial007_py310.py hl[2:4] *}

{* ../../docs_src/query_params_str_validations/tutorial015_an_py310.py hl[5,16:19,24] *}

/// info | Інформація