Generic Views in Django Tutorial Not Working

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Mike Starr

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Nov 1, 2019, 7:49:29 AM11/1/19
to Django users
Hi! There's a lot of error message to copy and paste so please request what you would like to see specifically. I am at https://docs.djangoproject.com/en/2.2/intro/tutorial04/#use-generic-views-less-code-is-better in the Django tutorial and it seems replacing HTTPRequests with GenericViews broke the web server. I followed the instructions and now have this:

ImproperlyConfigured at /polls/

IndexView is missing a QuerySet. Define IndexView.model, IndexView.queryset, or override IndexView.get_queryset().
Request Method:GET
Request URL:http://localhost:8000/polls/
Django Version:2.2.4
Exception Type:ImproperlyConfigured
Exception Value:
IndexView is missing a QuerySet. Define IndexView.model, IndexView.queryset, or override IndexView.get_queryset().
Exception Location:E:\computer stuff\python\lib\site-packages\django\views\generic\list.py in get_queryset, line 39
Python Executable:E:\computer stuff\python\python.exe
Python Version:3.7.3
Python Path:
['E:\\computer stuff\\python\\Django\\mysite',
 'E:\\computer stuff\\python',
 'E:\\computer stuff\\python\\Lib',
 'E:\\computer stuff\\python\\Django\\mysite',
 'E:\\computer stuff\\python\\python37.zip',
 'E:\\computer stuff\\python\\DLLs',
 'E:\\computer stuff\\python\\lib\\site-packages',
 'E:\\computer stuff\\python\\lib\\site-packages\\scrapy-1.5.0-py3.7.egg',
 'E:\\computer '
 'stuff\\python\\lib\\site-packages\\service_identity-18.1.0-py3.7.egg',
 'E:\\computer stuff\\python\\lib\\site-packages\\pydispatcher-2.0.5-py3.7.egg',
 'E:\\computer stuff\\python\\lib\\site-packages\\parsel-1.5.1-py3.7.egg',
 'E:\\computer stuff\\python\\lib\\site-packages\\six-1.12.0-py3.7.egg',
 'E:\\computer stuff\\python\\lib\\site-packages\\cssselect-1.0.3-py3.7.egg',
 'E:\\computer stuff\\python\\lib\\site-packages\\pyopenssl-19.0.0-py3.7.egg',
 'E:\\computer '
 'stuff\\python\\lib\\site-packages\\lxml-4.3.4-py3.7-win-amd64.egg',
 'E:\\computer stuff\\python\\lib\\site-packages\\queuelib-1.5.0-py3.7.egg',
 'E:\\computer stuff\\python\\lib\\site-packages\\w3lib-1.20.0-py3.7.egg',
 'E:\\computer '
 'stuff\\python\\lib\\site-packages\\pyasn1_modules-0.2.5-py3.7.egg',
 'E:\\computer stuff\\python\\lib\\site-packages\\win32',
 'E:\\computer stuff\\python\\lib\\site-packages\\win32\\lib',
 'E:\\computer stuff\\python\\lib\\site-packages\\Pythonwin']
Server time:Fri, 1 Nov 2019 01:03:42 -0700

Traceback Switch to copy-and-paste view

  • E:\computer stuff\python\lib\site-packages\django\core\handlers\exception.py in inner
    1.             response = get_response(request)
      …
  • E:\computer stuff\python\lib\site-packages\django\core\handlers\base.py in _get_response
    1.                 response = self.process_exception_by_middleware(e, request)
      …
  • E:\computer stuff\python\lib\site-packages\django\core\handlers\base.py in _get_response
    1.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)
      …
  • E:\computer stuff\python\lib\site-packages\django\views\generic\base.py in view
    1.             return self.dispatch(request, *args, **kwargs)
      …
  • E:\computer stuff\python\lib\site-packages\django\views\generic\base.py in dispatch
    1.         return handler(request, *args, **kwargs)
      …
  • E:\computer stuff\python\lib\site-packages\django\views\generic\list.py in get
    1.         self.object_list = self.get_queryset()
      …
  • E:\computer stuff\python\lib\site-packages\django\views\generic\list.py in get_queryset
    1.                     'cls': self.__class__.__name__
      …

Request information

USER

admin

GET

No GET data

POST

No POST data




















but polls.1 works:


What's new?

 
 
 
 






but voting yields


ValueError at /polls/1/vote/

The view polls.views.vote didn't return an HttpResponse object. It returned None instead.
Request Method:POST
Request URL:http://localhost:8000/polls/1/vote/
Django Version:2.2.4
Exception Type:ValueError
Exception Value:
The view polls.views.vote didn't return an HttpResponse object. It returned None instead.
Exception Location:E:\computer stuff\python\lib\site-packages\django\core\handlers\base.py in _get_response, line 126
Python Executable:E:\computer stuff\python\python.exe
Python Version:3.7.3
Python Path:
['E:\\computer stuff\\python\\Django\\mysite',
 'E:\\computer stuff\\python',
 'E:\\computer stuff\\python\\Lib',
 'E:\\computer stuff\\python\\Django\\mysite',
 'E:\\computer stuff\\python\\python37.zip',
 'E:\\computer stuff\\python\\DLLs',
 'E:\\computer stuff\\python\\lib\\site-packages',
 'E:\\computer stuff\\python\\lib\\site-packages\\scrapy-1.5.0-py3.7.egg',
 'E:\\computer '
 'stuff\\python\\lib\\site-packages\\service_identity-18.1.0-py3.7.egg',
 'E:\\computer stuff\\python\\lib\\site-packages\\pydispatcher-2.0.5-py3.7.egg',
 'E:\\computer stuff\\python\\lib\\site-packages\\parsel-1.5.1-py3.7.egg',
 'E:\\computer stuff\\python\\lib\\site-packages\\six-1.12.0-py3.7.egg',
 'E:\\computer stuff\\python\\lib\\site-packages\\cssselect-1.0.3-py3.7.egg',
 'E:\\computer stuff\\python\\lib\\site-packages\\pyopenssl-19.0.0-py3.7.egg',
 'E:\\computer '
 'stuff\\python\\lib\\site-packages\\lxml-4.3.4-py3.7-win-amd64.egg',
 'E:\\computer stuff\\python\\lib\\site-packages\\queuelib-1.5.0-py3.7.egg',
 'E:\\computer stuff\\python\\lib\\site-packages\\w3lib-1.20.0-py3.7.egg',
 'E:\\computer '
 'stuff\\python\\lib\\site-packages\\pyasn1_modules-0.2.5-py3.7.egg',
 'E:\\computer stuff\\python\\lib\\site-packages\\win32',
 'E:\\computer stuff\\python\\lib\\site-packages\\win32\\lib',
 'E:\\computer stuff\\python\\lib\\site-packages\\Pythonwin']
Server time:Fri, 1 Nov 2019 01:11:31 -0700

Traceback Switch to copy-and-paste view

  • E:\computer stuff\python\lib\site-packages\django\core\handlers\exception.py in inner
    1.             response = get_response(request)
      …
  • E:\computer stuff\python\lib\site-packages\django\core\handlers\base.py in _get_response
    1.                 "returned None instead." % (callback.__module__, view_name)
      …

Request information

USER

admin

GET

No GET data

POST

VariableValue
csrfmiddlewaretoken
'pLPWGJ7M3I1Idu1wuWYN1sTwdE9cESkJnCgd1jIY1qHc5ebY4sg6hSdNnyFeWOE6'
choice
'2'



Okay. So. I'm going to study this tutorial and code and see if I can solve the problem myself. If anyone has any suggestions I'll be checking back daily, so ti's much appreciated in advance.

Thank you!

Kasper Laudrup

unread,
Nov 1, 2019, 8:15:41 AM11/1/19
to django...@googlegroups.com
Hi Mike,

On 01/11/2019 09.14, Mike Starr wrote:
> Hi! There's a lot of error message to copy and paste so please request
> what you would like to see specifically. I am at
> https://docs.djangoproject.com/en/2.2/intro/tutorial04/#use-generic-views-less-code-is-better in
> the Django tutorial and it seems replacing HTTPRequests with
> GenericViews broke the web server. I followed the instructions and now
> have this:

Have you tried doing as the error message suggests:

>
> IndexView is missing a QuerySet. Define IndexView.model, IndexView.queryset, or override IndexView.get_queryset().
>

?

Kind regards,

Kasper Laudrup

Nijo Joseph

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Nov 1, 2019, 8:17:54 AM11/1/19
to Django users
class IndexView(generic.ListView):
    template_name = 'polls/index.html'
    context_object_name = 'latest_question_list'

    def get_queryset(self):
        """Return the last five published questions."""
        return Question.objects.order_by('-pub_date')[:5]

the def get_queryset(self): function is missing. check the indendation as well. always produce the code snippet.
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