Django开发中自定义异常处理的三种常用方法及DRF集成指南

# 利用继承自定义异常提示信息
class MyException(Exception):
  def __init__(self, code, error, data):
    self.code = code
    self.error = error
    self.data = data
try:
  if not 1 < 0:
    raise MyException(1001, '你的说法错误', '1不小于0')
except MyException as e:
  pass

class MyTest(object):
  def __init__(self):
    # 自定义状态码
    self.code = 1000
    self.error = ''
    self.data = ''
 
  @property
  def dict(self):
    return self.__dict__

# 创建实例对象
one = MyTest()
one.code = 1001
one.error = '你错了'
one.data = '请再次检查'
 
print(one.dict)

from rest_framework.views import exception_handler

def custom_exception_handler(exc, context):
  # Call REST framework's default exception handler first,
  # to get the standard error response.
  response = exception_handler(exc, context)

  # Now add the HTTP status code to the response.
  if response is not None:
    response.data['status_code'] = response.status_code
    print(response.data)
    # response.data['message'] =response.data['detail']  #增加message这个key
    # response.data['message'] ='方法不对'  #增加message这个key

  return response

from rest_framework import status
from rest_framework.exceptions import APIException
from common.tools import xd_status

# class ParseError(APIException):
#   status_code = xd_status.HTTP_400_BAD_REQUEST
#   default_detail = '这是.default_detail========'
#   default_code = 'parse_error'
#

class XdError(APIException):
  pass

class ParamError(XdError):
  status_code = 400

class Unauthorized(XdError):
  status_code = 401

class PermissionDenied(XdError):
  status_code = 403

class ObjectNotFound(XdError):
  status_code = 404

class ServerError(XdError):
  status_code = 500

class ErrorCode:
  UNAUTHORIZED = 10000 # 未登录
  PERMISSION_DENIED = 10001 # 无权限
  PARAM_ERROR = 40000 # 参数验证错误
  DATA_NOT_FOUND = 40001 # 未找到数据
  DATA_NOT_VALID = 40002 # 数据错误
  REPEAT_POST = 40003 # 重复提交
  EEEE = 40003 # 新型错误

class SupserUserDetailView(APIView):
  # authentication_classes = []
  permission_classes = [SupserPermisson,]

  def put(self,request,pk):
    if not request.user.is_superuser:
      if request.user.id != pk:
        raise ParamError('用户没有修改权限', ErrorCode.EEEE)  #这就是抛出自定义异常， 然后自己的异常捕获方式就能捕获这个异常
    user = User.objects.filter(id=pk)
    if not user:
      raise ParamError('被修改的用户不存在', ErrorCode.EEEE)
    data = handel_c_user(request.data)
    user_obj = Creat_newuser_serializers(data=data, instance=user.first())

    if user_obj.is_valid():
      user_obj.save()
      res={'status':"修改成功"}

      return JsonResponse(data=res, code=200, desc="success", status=status.HTTP_200_OK)
    res = {'status':user_obj.errors}

    return JsonResponse(data=res,code=200,desc="success",status=status.HTTP_200_OK)