验证实例：

class UserInfoSerializer(serializers.Serializer):
	  title = serializer.CharField(error_messages={'required':'标题不能为空'})


class UserInfoView(APIView):
      def post(self,request,*args,**kwargs): 
          ser = UserInfoSerializer(data=request.data)
          if ser.is_vaild():
             print(ser.vaildated_data['title'])
          else:
             print(ser.errors)
          return HttpResponse('提交数据')