Question

刚刚完成官方教程的第5部分，我遇到了一个问题。超链接的API工作得很好，期待我点击一个片段。例如，在以下内容中：

HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "count": 1,
    "next": null,
    "previous": null,
    "results": [
        {
            "url": "http://localhost:8000/snippets/1/",
            "owner": "ankush",
            "title": "",
            "code": "print 123",
            "linenos": false,
            "language": "python",
            "style": "friendly",
            "highlight": "http://localhost:8000/snippets/1/highlight/"
        }
    ]
}

点击网址会给我一个例外：＆＃39; Snippet Serializer＆＃39;对象不可调用。我以为我从教程中正确复制了一切，但显然我没有。代码在这里：https://github.com/ankush981/rest-demo

Finally, here's the entire trace:

Environment:


Request Method: GET
Request URL: http://localhost:8000/snippets/1/

Django Version: 1.9.7
Python Version: 3.4.3
Installed Applications:
('rest_framework',
 'snippets',
 'django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'django.middleware.security.SecurityMiddleware')



Traceback:

File "/media/common/code/python/django-rest/tutorial/env/lib/python3.4/site-packages/django/core/handlers/base.py" in get_response
  149.                     response = self.process_exception_by_middleware(e, request)

File "/media/common/code/python/django-rest/tutorial/env/lib/python3.4/site-packages/django/core/handlers/base.py" in get_response
  147.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/media/common/code/python/django-rest/tutorial/env/lib/python3.4/site-packages/django/views/decorators/csrf.py" in wrapped_view
  58.         return view_func(*args, **kwargs)

File "/media/common/code/python/django-rest/tutorial/env/lib/python3.4/site-packages/django/views/generic/base.py" in view
  68.             return self.dispatch(request, *args, **kwargs)

File "/media/common/code/python/django-rest/tutorial/env/lib/python3.4/site-packages/rest_framework/views.py" in dispatch
  466.             response = self.handle_exception(exc)

File "/media/common/code/python/django-rest/tutorial/env/lib/python3.4/site-packages/rest_framework/views.py" in dispatch
  463.             response = handler(request, *args, **kwargs)

File "/media/common/code/python/django-rest/tutorial/env/lib/python3.4/site-packages/rest_framework/generics.py" in get
  286.         return self.retrieve(request, *args, **kwargs)

File "/media/common/code/python/django-rest/tutorial/env/lib/python3.4/site-packages/rest_framework/mixins.py" in retrieve
  57.         serializer = self.get_serializer(instance)

File "/media/common/code/python/django-rest/tutorial/env/lib/python3.4/site-packages/rest_framework/generics.py" in get_serializer
  111.         return serializer_class(*args, **kwargs)

Exception Type: TypeError at /snippets/1/
Exception Value: 'SnippetSerializer' object is not callable

Answer 1

好的，亲爱的小点我检查一下代码：

不应该这样：

class SnippetDetail(generics.RetrieveUpdateDestroyAPIView):
    '''Retrieve, update or delete a snippet'''
    queryset = Snippet.objects.all()
    serializer_class = SnippetSerializer()
    permission_classes = (permissions.IsAuthenticatedOrReadOnly, IsOwnerOrReadOnly)

那样：

class SnippetDetail(generics.RetrieveUpdateDestroyAPIView):
    '''Retrieve, update or delete a snippet'''
    queryset = Snippet.objects.all()
    serializer_class = SnippetSerializer
    permission_classes = (permissions.IsAuthenticatedOrReadOnly, IsOwnerOrReadOnly)

＆＃39; Snippet Serializer＆＃39;对象不可调用

1 个答案: