And tools will also be happy because both `RedirectResponse` and `JSONResponse` are subclasses of `Response`, so the type annotation is correct.

### Annotate a Response Subclass { #annotate-a-response-subclass }

You can also use a subclass of `Response` in the type annotation:

{* ../../docs_src/response_model/tutorial003_03_py310.py hl[8:9] *}

                Read more about it in the
                [FastAPI docs for Custom Response - HTML, Stream, File, others](https://fastapi.tiangolo.com/advanced/custom-response/#redirectresponse).
                """
            ),
        ] = Default(JSONResponse),
        name: Annotated[
            str | None,
            Doc(
                """

                Read more about it in the
                [FastAPI docs for Custom Response - HTML, Stream, File, others](https://fastapi.tiangolo.com/advanced/custom-response/#redirectresponse).
                """
            ),
        ] = Default(JSONResponse),
        name: Annotated[
            str | None,
            Doc(
                """

這個簡單情境會由 FastAPI 自動處理，因為回傳型別註解是 `Response` 類別（或其子類別）。

而工具也會滿意，因為 `RedirectResponse` 與 `JSONResponse` 都是 `Response` 的子類別，所以型別註解是正確的。

### 註解為某個 Response 的子類別 { #annotate-a-response-subclass }

你也可以在型別註解中使用 `Response` 的子類別：

{* ../../docs_src/response_model/tutorial003_03_py310.py hl[8:9] *}

這同樣可行，因為 `RedirectResponse` 是 `Response` 的子類別，而 FastAPI 會自動處理這種簡單情況。

from fastapi import FastAPI
from fastapi.responses import RedirectResponse

app = FastAPI()


@app.get("/fastapi", response_class=RedirectResponse)
async def redirect_fastapi():

C'est la manière idéale d'obtenir la meilleure performance.

///

### `RedirectResponse` { #redirectresponse }

Renvoie une redirection HTTP. Utilise par défaut un code d'état 307 (Temporary Redirect).

Vous pouvez renvoyer directement une `RedirectResponse` :

{* ../../docs_src/custom_response/tutorial006_py310.py hl[2,9] *}

---

Dies ist der ideale Weg, um die beste Leistung zu erzielen.

///

### `RedirectResponse` { #redirectresponse }

Gibt eine HTTP-Weiterleitung (HTTP-Redirect) zurück. Verwendet standardmäßig den Statuscode 307 – Temporäre Weiterleitung (Temporary Redirect).

Sie können eine `RedirectResponse` direkt zurückgeben:

{* ../../docs_src/custom_response/tutorial006_py310.py hl[2,9] *}

---

Bu, en iyi performansı elde etmenin ideal yoludur.

///

### `RedirectResponse` { #redirectresponse }

HTTP redirect döndürür. Varsayılan olarak 307 status code (Temporary Redirect) kullanır.

`RedirectResponse`’u doğrudan döndürebilirsiniz:

{* ../../docs_src/custom_response/tutorial006_py310.py hl[2,9] *}

---

/// note | 技术细节

但如果你声明了响应模型或返回类型，将直接使用它来把数据序列化为 JSON，并直接返回一个具备正确 JSON 媒体类型的响应，而不会使用 `JSONResponse` 类。

这是获得最佳性能的理想方式。

///

### `RedirectResponse` { #redirectresponse }

返回 HTTP 重定向。默认情况下使用 307 状态码（临时重定向）。

你可以直接返回一个 `RedirectResponse`：

{* ../../docs_src/custom_response/tutorial006_py310.py hl[2,9] *}

---

或者你可以把它用于 `response_class` 参数：

Это идеальный способ получить наилучшую производительность.

///

### `RedirectResponse` { #redirectresponse }

Возвращает HTTP-редирект. По умолчанию использует статус-код 307 (Temporary Redirect — временное перенаправление).

Вы можете вернуть `RedirectResponse` напрямую:

{* ../../docs_src/custom_response/tutorial006_py310.py hl[2,9] *}

---