python之Django RESTful API 错误 "type object ' User' has no attribute '_meta' "

我正在尝试使用 django-rest-framework 和 cassandra 构建 RESTful API，逐步遵循 Django-rest-framework 上的官方 django-rest-framework 教程，我遇到了这个错误

Traceback: 
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response 
132. response = wrapped_callback(request,  *callback_args, **callback_kwargs) 
File "/usr/local/lib/python2.7/dist-packages/django/views/decorators/csrf.py" in wrapped_view 
58.         return view_func(*args, **kwargs) 
File "/usr/local/lib/python2.7/dist-packages/django/views/generic/base.py" in view 
  71.             return self.dispatch(request, *args, **kwargs) 
File "/usr/local/lib/python2.7/dist-packages/rest_framework/views.py" in   dispatch 
456.             response = self.handle_exception(exc) 
File "/usr/local/lib/python2.7/dist-packages/rest_framework/views.py" in   dispatch 
444.             self.initial(request, *args, **kwargs) 
File "/usr/local/lib/python2.7/dist-packages/rest_framework/views.py" in    initial 
359.         self.check_permissions(request) 
File "/usr/local/lib/python2.7/dist-packages/rest_framework/views.py" in check_permissions 
304.             if not permission.has_permission(request, self): 
File "/usr/local/lib/python2.7/dist-packages/rest_framework/permissions.py" in has_permission 
125.         perms = self.get_required_permissions(request.method, queryset.model) 
File "/usr/local/lib/python2.7/dist-packages/rest_framework/permissions.py" in get_required_permissions 
104.             'app_label': model_cls._meta.app_label, 
 
Exception Type: AttributeError at /users/ 
Exception Value: type object 'User' has no attribute '_meta' 

这是我的代码

urls.py

from django.conf.urls import  url 
from rest_framework.urlpatterns import format_suffix_patterns 
from tutorial import views 
 
urlpatterns = [ 
    # Examples: 
 
    url(r'^users/$', views.UsersList.as_view()), 
    url(r'^users/(?P<pk>[0-9]+)/$', views.UserDetail.as_view()), 
] 
 
 
urlpatterns = format_suffix_patterns(urlpatterns) 

模型.py

import uuid 
from cassandra.cqlengine import columns 
from cassandra.cqlengine.models import Model 
# Create your models here. 
 
class User(Model): 
    id = columns.UUID(primary_key=True, default=uuid.uuid4) 
    username = columns.Text(max_length=30, required=True) 
    password = columns.Text(max_length=55, required=True) 
    gender = columns.UUID(default=0) 
    languages = columns.List(value_type=columns.UUID) 
    friends = columns.Set(value_type=columns.UUID) 

序列化器.py

from rest_framework import serializers 
from tutorial.models import User 
 
class UserSerializer(serializers.ModelSerializer): 
    class Meta: 
        model = User 
        fields = ('username', 'position', 'gender', 'status', 'language') 

views.py

from tutorial.models import User 
from tutorial.serializers import UserSerializer 
from rest_framework import generics 
 
class UsersList(generics.ListCreateAPIView): 
    queryset = User.objects.all() 
    serializer_class = UserSerializer 
 
class UserDetail(generics.RetrieveUpdateDestroyAPIView): 
    queryset = User.objects.all() 
    serializer_class = UserSerializer 

预先感谢您的支持。

请您参考如下方法:

据我所知，cassandra 的模型没有实现元类，而元类是与 rest_framework 等应用程序一起工作所必需的。您将需要实现与 django 兼容的模型以使用 rest_framework。

正如 django-cassandra-engine 的一位开发人员所述:

cqlengine is about to be merged into python-driver soon. After that we can think about it, but it is important to know, that django-cassandra-engine never meant to be fully compatible with django models.

Github 问题 here