Dynamic Pydantic schemas based on user

[alispa]

@router.post("/example")
def create_something(data: UsersPydanticSchema):
      return "OK"

Is there a way to have UsersPydanticSchema customized for every user, for example place them into folders like user_A/schemas.py -> UsersPydanticSchema , or maybe there is a better idea.

Then, on every request, we get the user's folder name (ex. user_A) from the session or the token and call the proper UsersPydanticSchema .

[YuriiMotov]

The only way is to define a universal model that will fit for all users. Maybe using discriminated unions.

Or, if you don't care about openapi schema, you can exclude body parameters from endpoint declaration and validate body data manually from request.json

@app.post("/submit")
async def submit(request: Request):
    user_id = request.headers.get("X-User-ID")
    if not user_id:
        raise HTTPException(status_code=400, detail="Missing user ID")

    schema_cls = get_user_schema(user_id)

    try:
        body = await request.json()
        validated_data = schema_cls(**body)
    except ValidationError as e:
        raise HTTPException(status_code=422, detail=e.errors())