[Python] Displaying of FastAPI validation errors to end users

Discussão em 'Python' iniciado por Stack, Fevereiro 16, 2025.

  1. Stack

    Stack Membro Participativo

    I'm looking for some library or example of code to format FastAPI validation messages into human-readable format. E.g. this endpoint:

    @app.get("/")
    async def hello(name: str):
    return {"hello": name}



    Will produce the next json output if we miss name query parameter:

    {
    "detail":[
    {
    "loc":[
    "query",
    "name"
    ],
    "msg":"field required",
    "type":"value_error.missing"
    }
    ]
    }


    So my questions is, how to:

    1. Transform it into something like "name field is required" (for all kinds of possible errors) to show in toasts.
    2. Use it to display form validation messages
    3. Generate forms themselves from api description if it's possible

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