How to redirect on conditions with class based views in Django 1.3?

Question

I am using a ListView that list videos according to tags. The filtering happens in get_queryset(). I'd like to redirect the user to another page if the tag doesn't contains any video.

With a function, it would be easy. Query, check the queryset, redirect. With a class, I fail doing so:

class VideosView(generic.ListView):      def get_queryset(self):         """             This work.         """          tag = self.kwargs.get('tag', None)          self.videos = Video.on_site.all()          if tag:             self.videos = Video.tagged.with_all(tag, self.videos)          return self.videos      def get(self, request, *args, **kwargs):         """         This doesn't work because self.videos doesn't exist yet.         """         if not self.videos:             return redirect('other_page')          return super(Videos, self).get(request, *args, **kwargs) 

Answer 1

I know this is old, but I actually agree with Tommaso. The dispatch() method is what handles the request and returns the HTTP response. If you want to adjust the response of the view, thats the place to do it. Here are the docs on dispatch().

class VideosView(ListView):     # use model manager     queryset = Videos.on_site.all()      def dispatch(self, request, *args, **kwargs):         # check if there is some video onsite         if not queryset:             return redirect('other_page')         else:             return super(VideosView, self).dispatch(request, *args, **kwargs)      # other method overrides here 

Answer 2

Found it:

def render_to_response(self, context):      if not self.videos:         return redirect('other_page')      return super(VideosView, self).render_to_response(context) 

This is called for all HTTP methods