AttributeError at /impersonate/53523/

'QuerySet' object has no attribute 'exists'

Request Method:	GET
Request URL:	http://localhost:8000/impersonate/53523/
Exception Type:	AttributeError
Exception Value:	'QuerySet' object has no attribute 'exists'
Exception Location:	C:\virtualenvs\greatnorth\lib\site-packages\impersonate\helpers.py in check_allow_for_user, line 61
Python Executable:	C:\virtualenvs\greatnorth\Scripts\python.exe
Python Version:	2.7.1
Python Path:	['C:\\ClientWork\\GreatNorth', 'C:\\virtualenvs\\greatnorth\\lib\\site-packages\\setuptools-0.6c11-py2.7.egg', 'C:\\virtualenvs\\greatnorth\\lib\\site-packages\\pip-1.0.1-py2.7.egg', 'c:\\virtualenvs\\greatnorth\\src\\chronograph', 'C:\\Windows\\system32\\python27.zip', 'C:\\virtualenvs\\greatnorth\\DLLs', 'C:\\virtualenvs\\greatnorth\\lib', 'C:\\virtualenvs\\greatnorth\\lib\\plat-win', 'C:\\virtualenvs\\greatnorth\\lib\\lib-tk', 'C:\\virtualenvs\\greatnorth\\Scripts', 'C:\\Python27\\Lib', 'C:\\Python27\\DLLs', 'C:\\Python27\\Lib\\lib-tk', 'C:\\virtualenvs\\greatnorth', 'C:\\virtualenvs\\greatnorth\\lib\\site-packages', 'C:\\Python27\\lib\\site-packages\\virtualenv-1.6.1-py2.7.egg', 'C:\\Python27\\lib\\site-packages\\pip-1.0.1-py2.7.egg', 'c:\\clientwork\\bluetrain\\src\\pysnarl', 'C:\\Python27', 'C:\\Python27\\lib\\site-packages', 'C:\\Python27\\lib\\site-packages\\PIL', 'C:\\Python27\\lib\\site-packages\\win32', 'C:\\Python27\\lib\\site-packages\\win32\\lib', 'C:\\Python27\\lib\\site-packages\\Pythonwin']
Server time:	Fri, 30 Dec 2011 13:12:00 -0500

Traceback Switch to copy-and-paste view

C:\virtualenvs\greatnorth\lib\site-packages\django\core\handlers\base.py in get_response
1. # Apply view middleware
2. for middleware_method in self._view_middleware:
3. response = middleware_method(request, callback, callback_args, callback_kwargs)
4. if response:
5. return response
7. try:
1. response = callback(request, *callback_args, **callback_kwargs) ...
1. except Exception, e:
2. # If the view raised an exception, run it through exception
3. # middleware, and if the exception middleware returns a
4. # response, use that. Otherwise, reraise the exception.
5. for middleware_method in self._exception_middleware:
6. response = middleware_method(request, e)
▶ Local vars
C:\virtualenvs\greatnorth\lib\site-packages\impersonate\decorators.py in _checkuser
1. if getattr(request.user, 'is_impersonate', False):
2. # Do not allow an impersonated session to use the
3. # impersonate views.
4. return redirect(get_redir_path())
6. if check_allow_impersonate(request):
7. # user is allowed to impersonate
1. return view_func(request, *args, **kwargs) ...
1. else:
2. # user not allowed impersonate at all
3. return redirect(get_redir_path())
5. return _checkuser
▶ Local vars
C:\virtualenvs\greatnorth\lib\site-packages\impersonate\views.py in impersonate
1. View will fetch the User instance and store it
2. in the request.session under the '_impersonate' key.
4. The middleware will then pick up on it and adjust the
5. request object as needed.
6. '''
7. new_user = get_object_or_404(User, pk=uid)
1. if check_allow_for_user(request, new_user): ...
1. request.session['_impersonate'] = new_user
2. request.session.modified = True # Let's make sure...
3. return redirect(get_redir_path())
6. def stop_impersonate(request):
▶ Local vars
C:\virtualenvs\greatnorth\lib\site-packages\impersonate\helpers.py in check_allow_for_user
1. if check_allow_impersonate(start_user_request):
2. # start user can impersonate
3. # Can impersonate anyone who's not a superuser and who is in your
4. # queryset of 'who i can impersonate'
5. upk = end_user.pk
6. return (
7. not end_user.is_superuser and \
1. users_impersonable(start_user_request).filter(pk=upk).exists() ...
1. )
2. else:
3. # start user not allowed impersonate at all
4. return False
▶ Local vars

Environment:

Request Method: GET
Request URL: http://localhost:8000/impersonate/53523/
Django Version: 1.1.1
Python Version: 2.7.1
Installed Applications:
['django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.admin',
 'django.contrib.humanize',
 'django.contrib.comments',
 'djangodblog',
 'axes',
 'chronograph',
 'south',
 'impersonate',
 'residents',
 'minisites',
 'pages']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'djangodblog.middleware.DBLogMiddleware',
 'residents.middleware.SessionIdleTimeout',
 'impersonate.middleware.ImpersonateMiddleware')

Traceback:
File "C:\virtualenvs\greatnorth\lib\site-packages\django\core\handlers\base.py" in get_response
  92.                 response = callback(request, *callback_args, **callback_kwargs)
File "C:\virtualenvs\greatnorth\lib\site-packages\impersonate\decorators.py" in _checkuser
  24.             return view_func(request, *args, **kwargs)
File "C:\virtualenvs\greatnorth\lib\site-packages\impersonate\views.py" in impersonate
  21.     if check_allow_for_user(request, new_user):
File "C:\virtualenvs\greatnorth\lib\site-packages\impersonate\helpers.py" in check_allow_for_user
  61.             users_impersonable(start_user_request).filter(pk=upk).exists()

Exception Type: AttributeError at /impersonate/53523/
Exception Value: 'QuerySet' object has no attribute 'exists'