将fastapi(其实是pydantic)参数验证错误的信息“翻译”

fastapi_request_validation_error.py

import re

from fastapi import FastAPI, Request
from fastapi.responses import JSONResponse
from fastapi.exceptions import RequestValidationError

app = FastAPI()

# ------------------ 错误捕捉处理 ------------------
@app.exception_handler(RequestValidationError)
async def request_validation_error(request: Request, exc: RequestValidationError):
    # 处理参数验证失败
    exc = str(exc).replace('\n ', '').replace('\n', ' ')
    exc = exc.replace('validation errors for Request', '个参数验证错误;')
    exc = exc.replace('validation error for Request', '个参数验证错误;')
    exc = exc.replace('value is not a valid', '字段的值不是有效的')
    exc = exc.replace('field required', '字段为必填项')    
    exc = re.sub('\(type=.*?\)', ';', exc)
    exc = exc.replace(' ;', ';')
    return JSONResponse(
        status_code=200,
        content={'code': 422, 'msg': f'参数有误[{exc}]', 'data': None}
    )

    # 输出结果示例：{"code":422,"msg":"参数有误[3 个参数验证错误; query -> uid 字段的值不是有效的 integer; query -> page 字段的值不是有效的 integer; query -> pageSize 字段的值不是有效的 integer;]","data":null}