from fastapi.types import ModelNameMap
from fastapi.utils import (
    deep_dict_update,
    generate_operation_id_for_path,
    is_body_allowed_for_status_code,
)
from starlette.responses import JSONResponse
from starlette.routing import BaseRoute
from starlette.status import HTTP_422_UNPROCESSABLE_ENTITY
from typing_extensions import Literal

validation_error_definition = {
    "title": "ValidationError",

    return Response(content="Foo")


@app.get("/no_response_model-annotation_json_response_class")
def no_response_model_annotation_json_response_class() -> JSONResponse:
    return JSONResponse(content={"foo": "bar"})


client = TestClient(app)


def test_no_response_model_no_annotation_return_model():
    response = client.get("/no_response_model-no_annotation-return_model")

            async def openapi(req: Request) -> JSONResponse:
                root_path = req.scope.get("root_path", "").rstrip("/")
                if root_path not in server_urls:
                    if root_path and self.root_path_in_servers:
                        self.servers.insert(0, {"url": root_path})
                        server_urls.add(root_path)
                return JSONResponse(self.openapi())

from fastapi.responses import JSONResponse
from fastapi.testclient import TestClient


class ResponseLevel0(JSONResponse):
    media_type = "application/x-level-0"


class ResponseLevel1(JSONResponse):
    media_type = "application/x-level-1"


class ResponseLevel2(JSONResponse):
    media_type = "application/x-level-2"


class ResponseLevel3(JSONResponse):
    media_type = "application/x-level-3"

```JSON
{"message": "Oops! yolo did something. There goes a rainbow..."}
```

/// note | "📡 ℹ"

👆 💪 ⚙️ `from starlette.requests import Request` & `from starlette.responses import JSONResponse`.

**FastAPI** 🚚 🎏 `starlette.responses` `fastapi.responses` 🏪 👆, 👩‍💻. ✋️ 🌅 💪 📨 👟 🔗 ⚪️➡️ 💃. 🎏 ⏮️ `Request`.

///

## 🔐 🔢 ⚠ 🐕‍🦺

**FastAPI** ✔️ 🔢 ⚠ 🐕‍🦺.

```JSON
{"message": "Oops! yolo did something. There goes a rainbow..."}
```

/// note | "Технические детали"

Также можно использовать `from starlette.requests import Request` и `from starlette.responses import JSONResponse`.

**FastAPI** предоставляет тот же `starlette.responses`, что и `fastapi.responses`, просто для удобства разработчика. Однако большинство доступных ответов поступает непосредственно из Starlette. То же самое касается и `Request`.

```JSON
{"message": "Oops! yolo did something. There goes a rainbow..."}
```

/// note | "Detalhes Técnicos"

Você também pode usar `from starlette.requests import Request` and `from starlette.responses import JSONResponse`.

```JSON
{"message": "Oops! yolo did something. There goes a rainbow..."}
```

/// note | "Technische Details"

Sie können auch `from starlette.requests import Request` und `from starlette.responses import JSONResponse` verwenden.

```JSON
{"message": "Oops! yolo did something. There goes a rainbow..."}
```

/// note | "Technical Details"

You could also use `from starlette.requests import Request` and `from starlette.responses import JSONResponse`.

**FastAPI** provides the same `starlette.responses` as `fastapi.responses` just as a convenience for you, the developer. But most of the available responses come directly from Starlette. The same with `Request`.

///

```

This simple case is handled automatically by FastAPI because the return type annotation is the class (or a subclass of) `Response`.

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

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

```Python hl_lines="8-9"