docs: def _node_rating_count(self):
      """
      Return node_rating_count record
      or create it if it does not exist
  
      usage:
      node = Node.objects.get(pk=1)
      node.rating_count
      """
      try:
          return self.noderatingcount
      except ObjectDoesNotExist:
          node_rating_count = NodeRatingCount(node=self)
          node_rating_count.save()
          return node_rating_count