fastapi框架docs文档Responses去掉默认的异常响应422Validation Error

fastapi框架原生docs的Responses中会有个默认的422Validation Error响应，但大多数实际开发应该不需要，如何去除呢？

我用的方法是用猴子补丁重写fastapi.openapi.util里的get_openapi_path方法，去掉加入默认422的那段代码即可，下面这些

http422 = str(HTTP_422_UNPROCESSABLE_ENTITY)
            if (all_route_params or route.body_field) and not any(
                status in operation["responses"]
                for status in [http422, "4XX", "default"]
            ):
                operation["responses"][http422] = {
                    "description": "Validation Error",
                    "content": {
                        "application/json": {
                            "schema": {"$ref": REF_PREFIX + "HTTPValidationError"}
                        }
                    },
                }
                if "ValidationError" not in definitions:
                    definitions.update(
                        {
                            "ValidationError": validation_error_definition,
                            "HTTPValidationError": validation_error_response_definition,
                        }
                    )

新加一个自定义的方法重写

import http
import inspect
from typing import Dict, Set, Optional, Type, Any, List

from fastapi import routing
from fastapi.datastructures import DefaultPlaceholder
from fastapi.dependencies.utils import get_flat_dependant, get_flat_params
from fastapi.openapi.constants import METHODS_WITH_BODY, REF_PREFIX
from fastapi.openapi.utils import get_openapi_path, get_openapi_operation_metadata, get_openapi_security_definitions, \
    get_openapi_operation_parameters, get_openapi_operation_request_body, status_code_ranges
from fastapi.utils import is_body_allowed_for_status_code, deep_dict_update
from pydantic.schema import field_schema
from pydantic.utils import lenient_issubclass
from starlette.responses import Response, JSONResponse


def my_get_openapi_path(*, route: routing.APIRoute, model_name_map: Dict[type, str], operation_ids: Set[str]):
    ......

使用猴子补丁

from fastapi.openapi import utils
from myutils import my_get_openapi_path
utils.get_openapi_path = my_get_openapi_path

再启动docs的Responses里就没有422的响应了