ListCreateAPIView对象没有属性'_default_manager'

我有这些序列化器：

# Tickets
class TicketSerializer(serializers.ModelSerializer):
    class Meta:
        model = Ticket
        depth = 2

class TicketWriteSerializer(serializers.ModelSerializer):
    class Meta:
        model = Ticket

而这个观点：

class Tickets(generics.ListCreateAPIView):
  model = Ticket
  serializer_class = TicketSerializer

  def create(self, request, *args, **kwargs):
    serializer = TicketWriteSerializer(data=request.DATA, files=request.FILES)
    if serializer.is_valid():
      self.pre_save(serializer.object)
      self.object = serializer.save(force_insert=True)
      self.post_save(self.object, created=True)
      headers = self.get_success_headers(serializer.data)
      serializer = TicketSerializer(serializer.object)
      return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)

    return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

在我的urls文件中我添加如下：

url(r'^tickets/', Tickets.as_view(model=Tickets), name='tickets')

对于这个型号：

class Ticket(models.Model):
    customer = models.ForeignKey('Customer', null=True, blank=True)
    act = models.ForeignKey('Act')
    row = models.PositiveIntegerField()
    seat = models.PositiveIntegerField()
    # Price for a seat can go up to 9999.99
    price = models.DecimalField(max_digits=6, decimal_places=2)
    status = models.CharField(max_length=255)

现在每当我打电话/门票/我得到：

AttributeError at /tickets/

type object 'Tickets' has no attribute '_default_manager'

我想知道它是怎么来的 . 我想要的是两个Serializer，所以我可以像使用ForeignKeys一样发送数据“flat”但是使用depth = 2的所有数据检索它们 .

edit: TraceBack：

环境：请求方法：GET请求URL：http：// localhost：8000 / tickets / Django版本：1.7.1 Python版本：3.4.2已安装的应用程序：（'django.contrib.admin'，'django.contrib.auth '，'django.contrib.contenttypes'，'django.contrib.sessions'，'django.contrib.messages'，'django.contrib.staticfiles'，'server'，'rest_framework'，'rest_framework.authtoken'）已安装的中间件：（'django.contrib.sessions.middleware.SessionMiddleware'，'django.middleware.common.CommonMiddleware'，'django.contrib.auth.middleware.AuthenticationMiddleware'，'django.contrib.messages.middleware.MessageMiddleware'，'django .middleware.clickjacking.XFrameOptionsMiddleware'）回溯：get_response 111中的文件“/usr/lib/python3.4/site-packages/django/core/handlers/base.py”.response = wrapped_callback（request，* callback_args，** callback_kwargs）文件“/usr/lib/python3.4/site-packages/django/views/decorators/csrf.py”在wrapped_view 57中 . 返回view_func（* args，** kwargs）文件“/ usr / lib / python3 . 4 /站点包/django/views/generic/base.py“在视图69中 . 返回self.dispatch（request，* args，** kwargs）文件”/usr/lib/python3.4/site-packages/rest_framework/views.py“在dispatch 403中，response = self.handle_exception（exc）文件“/usr/lib/python3.4/site-packages/rest_framework/views.py”在dispatch 400中.response = handler（request，* args，** kwargs）获取493中的文件“/usr/lib/python3.4/site-packages/rest_framework/generics.py” . 返回self.list（request，* args，** kwargs）文件“/usr/lib/python3.4/列表76中的site-packages / rest_framework / mixins.py“ . self.object_list = self.filter_queryset（self.get_queryset（））文件”/usr/lib/python3.4/site-packages/rest_framework/generics.py“in get_queryset 296. return self.model._default_manager.all（）Exception Type：AttributeError at / tickets / Exception值：type对象'Tickets'没有属性'_default_manager'