Django-Rest框架：序列化程序响应

Question

我在DRF中的视图集有问题：

def get_queryset(self):
    """
    :return: filtered queryset based on request query_param

    """
    # todo#amedeo: improve the readability code
    qs = super(ChecklistViewSet, self).get_queryset()
    _pk = self.kwargs['pk']

    if self.request.method == 'PUT':
        instance = qs.filter(pk=int(_pk)).first()
        # pass in the instance we want to update
        serializer = ChecklistSerializer(instance, self.request.data)

        # validate and update
        if serializer.is_valid():
            serializer.save()
            serializer_dict = serializer.data
            serializer_dict["message"] = "Checklist updated successfully."
            return response.Response(serializer_dict, status=status.HTTP_200_OK)

        else:
            return response.Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

在我的代码中，objetc被保存了，但是响应给出了一个错误：

AttributeError: 'Response' object has no attribute 'model'

我的序列化程序是：

^{pr2}$

我通过传递json的客户端PUT方法调用：

{
"approved_by": "Test",
"role": "test_role_4",
"hardship_classification": "test_6",
"total_capacity": "50",
"capacity_for_residents": "350",
"checklist_type": "permanent",
"state": "qcl_draft",
"pdf": null,
"submitting_afp": 3999,
"disabled": false,
"location": 97
}

但我接受了这个错误。模型已保存，但响应显示错误

Internal Server Error: /api/v1/checklists/3/ Traceback (most recent call last): File "/home/adifilippo/.envs/accomodation/local/lib/python2.7/site-packages/django/core/handlers/exception.py", line 41, in inner response = get_response(request) File "/home/adifilippo/.envs/accomodation/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 187, in _get_response response = self.process_exception_by_middleware(e, request) File "/home/adifilippo/.envs/accomodation/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 185, in _get_response response = wrapped_callback(request, *callback_args, **callback_kwargs) File "/home/adifilippo/.envs/accomodation/local/lib/python2.7/site-packages/django/views/decorators/csrf.py", line 58, in wrapped_view return view_func(*args, **kwargs) File "/home/adifilippo/.envs/accomodation/local/lib/python2.7/site-packages/rest_framework/viewsets.py", line 116, in view return self.dispatch(request, *args, **kwargs) File "/home/adifilippo/.envs/accomodation/local/lib/python2.7/site-packages/rest_framework/views.py", line 495, in dispatch response = self.handle_exception(exc) File "/home/adifilippo/.envs/accomodation/local/lib/python2.7/site-packages/rest_framework/views.py", line 455, in handle_exception self.raise_uncaught_exception(exc) File "/home/adifilippo/.envs/accomodation/local/lib/python2.7/site-packages/rest_framework/views.py", line 483, in dispatch self.initial(request, *args, **kwargs) File "/home/adifilippo/.envs/accomodation/local/lib/python2.7/site-packages/rest_framework/views.py", line 401, in initial self.check_permissions(request) File "/home/adifilippo/.envs/accomodation/local/lib/python2.7/site-packages/rest_framework/views.py", line 334, in check_permissions if not permission.has_permission(request, self): File "/home/adifilippo/.envs/accomodation/local/lib/python2.7/site-packages/rest_framework/permissions.py", line 206, in has_permission perms = self.get_required_permissions(request.method, queryset.model) AttributeError: 'Response' object has no attribute 'model' "PUT /api/v1/checklists/3/ HTTP/1.1" 500 42934

在此处输入代码

Answer 1

get_queryset方法应该返回queryset而不是{}，并且更新操作应该在put方法中被重写。读这里class-based-views然后 filtering获取更多详细信息。可能需要删除get_queryset重写，只需添加put方法，如下所示：

def put(self, request, pk, format=None):
    instance = self.get_object(pk)
    # pass in the instance we want to update
    serializer = ChecklistSerializer(instance, self.request.data)

    # validate and update
    if serializer.is_valid():
        serializer.save()
        serializer_dict = serializer.data
        serializer_dict["message"] = "Checklist updated successfully."
        return response.Response(serializer_dict, status=status.HTTP_200_OK)

    else:
        return response.Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)