```

/// info | "信息"

注意，这里在*路径操作函数*中只声明了一个依赖项，即 `query_or_cookie_extractor` 。

但 **FastAPI** 必须先处理 `query_extractor`，以便在调用 `query_or_cookie_extractor` 时使用 `query_extractor` 返回的结果。

///

```mermaid
graph TB

query_extractor(["query_extractor"])
query_or_cookie_extractor(["query_or_cookie_extractor"])

read_query["/items/"]

query_extractor --> query_or_cookie_extractor --> read_query
```

## 多次使用同一个依赖项

* Chamar sua dependência ("injetável") com os parâmetros corretos.
* Obter o resultado da função.
* Atribuir esse resultado para o parâmetro em sua *função de operação de rota*.

```mermaid
graph TB

common_parameters(["common_parameters"])
read_items["/items/"]
read_users["/users/"]

common_parameters --> read_items
common_parameters --> read_users
```

func loadMetacacheSample(t testing.TB) *metacacheReader {
	b, err := os.ReadFile("testdata/metacache.s2")
	if err != nil {
		t.Fatal(err)
	}
	return newMetacacheReader(bytes.NewReader(b))
}

func loadMetacacheSampleEntries(t testing.TB) metaCacheEntriesSorted {
	r := loadMetacacheSample(t)
	defer r.Close()

Но **FastAPI** будет знать, что сначала он должен выполнить `query_extractor`, чтобы передать результаты этого в `query_or_cookie_extractor` при его вызове.

///

```mermaid
graph TB

query_extractor(["query_extractor"])
query_or_cookie_extractor(["query_or_cookie_extractor"])

read_query["/items/"]

query_extractor --> query_or_cookie_extractor --> read_query
```

Mas o **FastAPI** saberá que precisa solucionar `query_extractor` primeiro, para passar o resultado para `query_or_cookie_extractor` enquanto chama a função.

///

```mermaid
graph TB

query_extractor(["query_extractor"])
query_or_cookie_extractor(["query_or_cookie_extractor"])

read_query["/items/"]

query_extractor --> query_or_cookie_extractor --> read_query
```

*path operation関数*の中で宣言している依存関係は`query_or_cookie_extractor`の１つだけであることに注意してください。

しかし、**FastAPI** は`query_extractor`を最初に解決し、その結果を`query_or_cookie_extractor`を呼び出す時に渡す必要があることを知っています。

///

```mermaid
graph TB

query_extractor(["query_extractor"])
query_or_cookie_extractor(["query_or_cookie_extractor"])

read_query["/items/"]

query_extractor --> query_or_cookie_extractor --> read_query
```

## 同じ依存関係の複数回の使用

///

새로운 요청이 도착할 때마다, **FastAPI**는 다음을 처리합니다:

* 올바른 매개변수를 가진 의존성("디펜더블") 함수를 호출합니다.
* 함수에서 결과를 받아옵니다.
* *경로 작동 함수*에 있는 매개변수에 그 결과를 할당합니다

```mermaid
graph TB

common_parameters(["common_parameters"])
read_items["/items/"]
read_users["/users/"]

common_parameters --> read_items
common_parameters --> read_users
```

	BucketStatuses                map[string]ResyncStatusType `json:"buckets" msg:"bkts"`
	TotBuckets                    int                         `json:"totbuckets" msg:"tb"`
	TargetReplicationResyncStatus `json:"currSt" msg:"cst"`
}

func (s *SiteResyncStatus) clone() SiteResyncStatus {
	if s == nil {
		return SiteResyncStatus{}
	}
	o := *s

		if expectErr != testCase.expectErr {
			t.Fatalf("case %v: error: expected: %v, got: %v", i+1, testCase.expectErr, expectErr)
		}
	}
}

func newStorageRESTHTTPServerClient(t testing.TB) *storageRESTClient {
	// Grid with 2 hosts
	tg, err := grid.SetupTestGrid(2)
	if err != nil {
		t.Fatalf("SetupTestGrid: %v", err)
	}
	t.Cleanup(tg.Cleanup)

pkg syscall (windows-amd64), type SysProcAttr struct, ParentProcess Handle
pkg testing, method (*B) Setenv(string, string)
pkg testing, method (*T) Setenv(string, string)
pkg testing, type TB interface, Setenv(string, string)
pkg text/template/parse, const SkipFuncCheck = 2
pkg text/template/parse, const SkipFuncCheck Mode
pkg time, const Layout = "01/02 03:04:05PM '06 -0700"
pkg time, const Layout ideal-string