那些遇到过的问题

WrappedAttributeError 'IsAdminUser' 对象没有属性 'authenticate'

use*_*500 1 django django-authentication django-rest-framework

我正在使用 Django Rest Frameworkpermission_classes来创建 API。我的理解是，一旦我使用未经身份验证的用户访问该 API，我应该被重定向到登录表单，对吗？相反，我收到以下错误：

WrappedAttributeError at /sessions/api/listPatients/ 'IsAdminUser' object has no attribute 'authenticate'

没有重定向到登录表单......我不明白为什么。

为什么会这样？我究竟做错了什么？如何解决？

这是urls.py：

path('api/getSessions/',
     views.GetSessions.as_view(),
     name="GetSessionsAPI"),
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这是我试图去的观点： 

class GetSessions(generics.ListCreateAPIView):
    permission_classes = (permissions.IsAuthenticated,)
    serializer_class = SessionSerializer

    def get_queryset(self):
        if self.request.user.is_authenticated:
            return Session.objects.filter(
                patient__created_by_user=self.request.user)
        else:
            raise PermissionDenied
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这是另一个引发错误的： 

class ListPatients(generics.ListAPIView):

    permission_classes = (permissions.IsAuthenticated,)
    serializer_class = PatientsSerializer

    def get_queryset(self):
        if self.request.user.is_authenticated:
            try:
                return Patient.objects.filter(
                    created_by_user=self.request.user).\
                   filter(curently_active=True)
            except Patient.DoesNotExist:
                raise PermissionDenied
    else:
        raise PermissionDenied
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这是完整的追溯： 

WrappedAttributeError at /sessions/api/listPatients/
'IsAdminUser' object has no attribute 'authenticate'
Request Method: GET
Request URL:    http://localhost:8000/sessions/api/listPatients/
Django Version: 2.0.5
Exception Type: WrappedAttributeError
Exception Value:    
'IsAdminUser' object has no attribute 'authenticate'
Exception Location: /Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/rest_framework/request.py in _authenticate, line 375
Python Executable:  /Users/karol/Development/ZS_2_0/ZS_2_0_venv/bin/python
Python Version: 3.6.4
Python Path:    
['/Users/karol/Development/ZS_2_0/zapiszsesje_2_0',
 '/Users/karol/Development/ZS_2_0',
 '/Users/karol/Development/ZS_2_0/zapiszsesje_2_0/patient',
 '/Users/karol/Development/ZS_2_0/zapiszsesje_2_0/services',
 '/Users/karol/Development/ZS_2_0/zapiszsesje_2_0/notes',
 '/Users/karol/Development/ZS_2_0/zapiszsesje_2_0/practice',
 '/Users/karol/Development/ZS_2_0/zapiszsesje_2_0/activity_logger',
 '/Users/karol/Development/ZS_2_0/zapiszsesje_2_0/session',
 '/Users/karol/Development/ZS_2_0/zapiszsesje_2_0/my_calendar',
 '/Users/karol/Development/ZS_2_0/zapiszsesje_2_0/session/tests',
 '/Users/karol/Development/ZS_2_0/zapiszsesje_2_0/zapiszsesje_2_0/users',
 '/Users/karol/Development/ZS_2_0/zapiszsesje_2_0/zapiszsesje_2_0',
 '/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python36.zip',
 '/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6',
 '/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/lib-dynload',
 '/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6',
 '/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages',
 '/Applications/PyCharm.app/Contents/helpers/pycharm_matplotlib_backend',
 '/Users/karol/Development/ZS_2_0/zapiszsesje_2_0/zapiszsesje_2_0',
 '/Users/karol/Development/ZS_2_0/zapiszsesje_2_0',
 '/Users/karol/Development/ZS_2_0/zapiszsesje_2_0/zapiszsesje_2_0']
Server time:    Sat, 17 Nov 2018 15:29:56 +0100
Traceback Switch to copy-and-paste view

/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/rest_framework/request.py in wrap_attributeerrors
        yield ...
? Local vars
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/rest_framework/request.py in user
                self._authenticate() ...
? Local vars
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/rest_framework/request.py in _authenticate
                user_auth_tuple = authenticator.authenticate(self) ...
? Local vars
During handling of the above exception ('IsAdminUser' object has no attribute 'authenticate'), another exception occurred:
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/django/core/handlers/exception.py in inner
            response = get_response(request) ...
? Local vars
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/django/core/handlers/base.py in _get_response
                response = self.process_exception_by_middleware(e, request) ...
? Local vars
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/django/core/handlers/base.py in _get_response
                response = wrapped_callback(request, *callback_args, **callback_kwargs) ...
? Local vars
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/contextlib.py in inner
                return func(*args, **kwds) ...
? Local vars
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/django/views/decorators/csrf.py in wrapped_view
        return view_func(*args, **kwargs) ...
? Local vars
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/django/views/generic/base.py in view
            return self.dispatch(request, *args, **kwargs) ...
? Local vars
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/rest_framework/views.py in dispatch
            response = self.handle_exception(exc) ...
? Local vars
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/rest_framework/views.py in handle_exception
            self.raise_uncaught_exception(exc) ...
? Local vars
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/rest_framework/views.py in dispatch
            self.initial(request, *args, **kwargs) ...
? Local vars
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/rest_framework/views.py in initial
        self.perform_authentication(request) ...
? Local vars
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/rest_framework/views.py in perform_authentication
        request.user ...
? Local vars
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/rest_framework/request.py in user
                self._authenticate() ...
? Local vars
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/contextlib.py in __exit__
                self.gen.throw(type, value, traceback) ...
? Local vars
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/rest_framework/request.py in wrap_attributeerrors
        six.reraise(type(exc), exc, info[2]) ...
? Local vars
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/django/utils/six.py in reraise
            raise value.with_traceback(tb) ...
? Local vars
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/rest_framework/request.py in wrap_attributeerrors
        yield ...
? Local vars
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/rest_framework/request.py in user
                self._authenticate() ...
? Local vars
/Users/karol/Development/ZS_2_0/ZS_2_0_venv/lib/python3.6/site-packages/rest_framework/request.py in _authenticate
                user_auth_tuple = authenticator.authenticate(self) ...
? Local vars
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更新：当我更改 base.py 设置文件中的以下行时，此错误消失： 

REST_FRAMEWORK = {
    'DEFAULT_AUTHENTICATION_CLASSES': (
        'rest_framework.authentication.BasicAuthentication',
        'rest_framework.authentication.SessionAuthentication',
        'rest_framework.permissions.IsAdminUser', # <- commenting out solves the problem!
    ),
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然而，这行是在《Django 的两勺...

use*_*500 7

原来这是我的错误，由于我的问题下的评论而被发现：

我错误地添加'rest_framework.permissions.IsAdminUser',到DEFAULT_AUTHENTICATION_CLASSES而不是DEFAULT_PERMISSION_CLASSES在我的设置文件中。

这解决了问题 - 谢谢！:)

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