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  1. docs_src/handling_errors/tutorial003_py310.py

    
    class UnicornException(Exception):
        def __init__(self, name: str):
            self.name = name
    
    
    app = FastAPI()
    
    
    @app.exception_handler(UnicornException)
    async def unicorn_exception_handler(request: Request, exc: UnicornException):
        return JSONResponse(
            status_code=418,
            content={"message": f"Oops! {exc.name} did something. There goes a rainbow..."},
        )
    
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Thu Feb 12 13:19:43 GMT 2026
    - 626 bytes
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  2. docs/ja/docs/tutorial/handling-errors.md

    カスタム例外ハンドラを`@app.exception_handler()`で追加することができます:
    
    {* ../../docs_src/handling_errors/tutorial003_py310.py hl[5:7,13:18,24] *}
    
    ここで、`/unicorns/yolo`をリクエストすると、*path operation*は`UnicornException`を`raise`します。
    
    しかし、これは`unicorn_exception_handler`で処理されます。
    
    そのため、HTTPステータスコードが`418`で、JSONの内容が以下のような明確なエラーを受け取ることになります:
    
    ```JSON
    {"message": "Oops! yolo did something. There goes a rainbow..."}
    ```
    
    /// note | 技術詳細
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Fri Mar 20 14:07:17 GMT 2026
    - 11.2K bytes
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  3. docs/es/docs/tutorial/handling-errors.md

    {* ../../docs_src/handling_errors/tutorial003_py310.py hl[5:7,13:18,24] *}
    
    Aquí, si solicitas `/unicorns/yolo`, la *path operation* lanzará un `UnicornException`.
    
    Pero será manejado por el `unicorn_exception_handler`.
    
    Así que recibirás un error limpio, con un código de estado HTTP de `418` y un contenido JSON de:
    
    ```JSON
    {"message": "Oops! yolo did something. There goes a rainbow..."}
    ```
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Thu Mar 19 18:15:55 GMT 2026
    - 9.6K bytes
    - Click Count (0)
  4. docs/pt/docs/tutorial/handling-errors.md

    Nesse cenário, se você fizer uma requisição para `/unicorns/yolo`, a *operação de rota* vai lançar (`raise`) o `UnicornException`.
    
    Essa exceção será manipulada, contudo, pelo `unicorn_exception_handler`.
    
    Dessa forma você receberá um erro "limpo", com o HTTP status code `418` e um JSON com o conteúdo:
    
    ```JSON
    {"message": "Oops! yolo did something. There goes a rainbow..."}
    ```
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Thu Mar 19 18:20:43 GMT 2026
    - 10.1K bytes
    - Click Count (0)
  5. fastapi/applications.py

                def __init__(self, name: str):
                    self.name = name
    
    
            app = FastAPI()
    
    
            @app.exception_handler(UnicornException)
            async def unicorn_exception_handler(request: Request, exc: UnicornException):
                return JSONResponse(
                    status_code=418,
                    content={"message": f"Oops! {exc.name} did something. There goes a rainbow..."},
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Wed Apr 01 16:16:24 GMT 2026
    - 178.6K bytes
    - Click Count (0)
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