& ⤴️ ⚫️ 📨 `dict` ⚗ 📚 💲.

### 🗄 `Depends`

{* ../../docs_src/dependencies/tutorial001.py hl[3] *}

### 📣 🔗, "⚓️"

🎏 🌌 👆 ⚙️ `Body`, `Query`, ♒️. ⏮️ 👆 *➡ 🛠️ 🔢* 🔢, ⚙️ `Depends` ⏮️ 🆕 🔢:

{* ../../docs_src/dependencies/tutorial001.py hl[15,20] *}

👐 👆 ⚙️ `Depends` 🔢 👆 🔢 🎏 🌌 👆 ⚙️ `Body`, `Query`, ♒️, `Depends` 👷 👄 🎏.

👆 🕴 🤝 `Depends` 👁 🔢.

👉 🔢 🔜 🕳 💖 🔢.

      TestCharSource okSource = new TestCharSource(STRING);
      assertThrows(IOException.class, () -> okSource.copyTo(new TestCharSink(option)));
      // ensure reader was closed IF it was opened (depends on implementation whether or not it's
      // opened at all if sink.newWriter() throws).
      assertTrue(
          "stream not closed when copying to sink with option: " + option,

👉, 👥 🗄 & ⚙️ `Security` ⚪️➡️ `fastapi`.

👆 💪 ⚙️ `Security` 📣 🔗 (💖 `Depends`), ✋️ `Security` 📨 🔢 `scopes` ⏮️ 📇 ↔ (🎻).

👉 💼, 👥 🚶‍♀️ 🔗 🔢 `get_current_active_user` `Security` (🎏 🌌 👥 🔜 ⏮️ `Depends`).

✋️ 👥 🚶‍♀️ `list` ↔, 👉 💼 ⏮️ 1️⃣ ↔: `items` (⚫️ 💪 ✔️ 🌅).

& 🔗 🔢 `get_current_active_user` 💪 📣 🎧-🔗, 🚫 🕴 ⏮️ `Depends` ✋️ ⏮️ `Security`. 📣 🚮 👍 🎧-🔗 🔢 (`get_current_user`), & 🌖 ↔ 📄.

`Security` ist tatsächlich eine Unterklasse von `Depends` und hat nur noch einen zusätzlichen Parameter, den wir später kennenlernen werden.

Durch die Verwendung von `Security` anstelle von `Depends` weiß **FastAPI** jedoch, dass es Sicherheits-Scopes deklarieren, intern verwenden und die API mit OpenAPI dokumentieren kann.

**FastAPI**는 `CommonQueryParams` 클래스를 호출합니다. 이것은 해당 클래스의 "인스턴스"를 생성하고 그 인스턴스는 함수의 매개변수 `commons`로 전달됩니다.

## 타입 힌팅 vs `Depends`

위 코드에서 `CommonQueryParams`를 두 번 작성한 방식에 주목하십시오:

```Python
commons: CommonQueryParams = Depends(CommonQueryParams)
```

마지막 `CommonQueryParams` 변수를 보면:

```Python
... = Depends(CommonQueryParams)
```

... **FastAPI**가 실제로 어떤 것이 의존성인지 알기 위해서 사용하는 방법입니다.

  * Marking a StorageClass as default makes it so that even a PersistentVolumeClaim without a StorageClass specified will trigger dynamic provisioning (instead of binding to an existing pool of PVs).
  * If you depend on the old behavior of volumes binding to existing pool of PersistentVolume objects then modify the StorageClass object and set `storageclass.beta.kubernetes.io/is-default-class` to `false`.

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

## Внедрение зависимости текущего пользователя

Теперь мы можем использовать тот же `Depends` с нашей зависимостью `get_current_user` в *функции обрабатывающей эндпоинт*:

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

      // The names are repetitive so re-use the same builder to avoid allocations.
      val fileBuilder = StringBuilder(key).append('.')
      val truncateTo = fileBuilder.length
      for (i in 0 until valueCount) {
        fileBuilder.append(i)
        cleanFiles += directory / fileBuilder.toString()
        fileBuilder.append(".tmp")
        dirtyFiles += directory / fileBuilder.toString()
        fileBuilder.setLength(truncateTo)

        // Create a very long URL
        StringBuilder longUrl = new StringBuilder("https://example.com/");
        for (int i = 0; i < 1000; i++) {
            longUrl.append("very/long/path/segment/");
        }
        longUrl.append("file.html");

        urlFilter.addInclude("https://example.com/.*");

        // Should handle long URLs without issues
        assertTrue(urlFilter.match(longUrl.toString()));

**FastAPI** は`CommonQueryParams`クラスを呼び出します。これにより、そのクラスの「インスタンス」が作成され、インスタンスはパラメータ`commons`として関数に渡されます。

## 型注釈と`Depends`

上のコードでは`CommonQueryParams`を２回書いていることに注目してください:

```Python
commons: CommonQueryParams = Depends(CommonQueryParams)
```

以下にある最後の`CommonQueryParams`:

```Python
... = Depends(CommonQueryParams)
```

...は、**FastAPI** が依存関係を知るために実際に使用するものです。