title: Index Error: list index out of range in Django
body: <p>I'm using Django 1.7 with Django Rest Framework. I've written an API that detects the login of a user as follows:</p>
  
  <pre><code>def login_check(request):
      user = request.user
      if user.is_anonymous():
          return HttpResponse(json.dumps({
              'success': False
          }))
      else:
          try:
              user_obj = UserProfile.objects.get(user__pk=user.id)
          except UserProfile.DoesNotExist:
              main_obj = User.objects.get(pk=user.id)
              user_obj = UserProfile(user=main_obj)
              user_obj.save()
          fb_uid = SocialAccount.objects.filter(user_id=user.id, provider='facebook')
          print fb_uid[0].uid
          user_obj.profile_photo_url = "http://graph.facebook.com/{}/picture?width=300&amp;height=300".format(fb_uid[0].uid)
          user_obj.save()
          serialized = UserProfileSerializer(user_obj)
          return Response(serialized.data, status=status.HTTP_200_OK)
  </code></pre>
  
  <p>I face an error with this view which shows the following traceback</p>
  
  <pre><code>IndexError at /loginCheck/
  list index out of range
  Request Method: GET
  Request URL:    http://localhost:8000/loginCheck/
  Django Version: 1.7.4
  Exception Type: IndexError
  Exception Value:    
  list index out of range
  Exception Location: f:\App\venv\lib\site-packages\django\db\models\query.py in __getitem__, line 178
  Python Executable:  f:\App\venv\Scripts\python.exe
  Python Version: 2.7.6
  Python Path:    
  ['f:\\App',
   'f:\\App\\venv\\lib\\site-packages\\psycopg2-2.6-py2.7-win32.egg',
   'C:\\WINDOWS\\SYSTEM32\\python27.zip',
   'f:\\App\\venv\\DLLs',
   'f:\\App\\venv\\lib',
   'f:\\App\\venv\\lib\\plat-win',
   'f:\\App\\venv\\lib\\lib-tk',
   'f:\\App\\venv\\Scripts',
   'c:\\Python27\\Lib',
   'c:\\Python27\\DLLs',
   'c:\\Python27\\Lib\\lib-tk',
   'f:\\App\\venv',
   'f:\\App\\venv\\lib\\site-packages']
  </code></pre>
  
  <p>I'm not entirely sure if this is an error in my code or Django's query.py. I'd appreciate help in figuring out the problem here</p>