code: def move(request, content_type_id, obj_id, rank):
      
      content_type = ContentType.objects.get_for_id(content_type_id)
      obj = get_object_or_404(content_type.model_class(), id=obj_id)
      obj.rank = int(rank)
      obj.save()
  
      return HttpResponseRedirect(request.META['HTTP_REFERER'])
docs: View to be used in the django admin for changing a :class:`RankedModel`
      object's rank.  See :func:`admin_link_move_up` and
      :func:`admin_link_move_down` for helper functions to incoroprate in your
      admin models.
  
      Upon completion this view sends the caller back to the referring page.
  
      :param content_type_id:
          ``ContentType`` id of object being moved
      :param obj_id:
          ID of object being moved
      :param rank:
          New rank of the object