title: Django REST Framework add a ViewSet as detail on another ViewSet
body: <p>I've got two models, one of a box and one of box comment:</p>
  
  <p><code>class BoxViewSet(viewsets.ModelViewSet):
          queryset = Box.objects.all()
          permission_classes = IsAuthenticated,
          serializer_class = BoxSerializer
  </code></p>
  
  <p><code>class BoxCommentViewSet(viewsets.ModelViewSet):
          model = BoxComment
          serializer_class = CommentSerializer
          permission_classes = IsAuthenticated
          def get_queryset(self):
              # this should return a queryset that filters based on the
              # box in the route
              return BoxComment.objects.all()
  </code></p>
  
  <p>If I've set up a router to make Boxes available at <code>/boxes/</code> and specific boxes available at <code>/boxes/{id}/</code> using<br>
   <code>router.register(r'boxes', feed.views.BoxViewSet)</code><br>
  is it possible to make comments available at <code>/boxes/{id}/comments/</code>? Or should I just set up a separate route and use GET/POST parameters to refer to specific boxes?</p>