code: def render_to_response(self, *args, **kwargs):
          '''Canonicalize the URL if the slug changed'''
          if self.request.path != self.object.get_absolute_url():
              return HttpResponseRedirect(self.object.get_absolute_url())
          return super(TalkView, self).render_to_response(*args, **kwargsf render_to_response(self, *args, **kwargs):
          '''Canonicalize the URL if the slug changed'''
          if self.request.path != self.object.get_absolute_url():
              return HttpResponseRedirect(self.object.get_absolute_url())
          return super(TalkView, self).render_to_response(*args, **kwargs)
docs: Canonicalize the URL if the slug changed