code: def add_to_favorites(current):
      
      msg = Message.objects.get(current.input['key'])
      current.output = {'status': 'Created', 'code': 201}
      fav, new = Favorite.objects.get_or_create(user_id=current.user_id, message=msg)
      current.output['favorite_key'] = fav.key
docs: Favorite a message
  
      .. code-block:: python
  
          #  request:
              {
              'view':'_zops_add_to_favorites,
              'key': key,
              }
  
          #  response:
              {
              'status': 'Created',
              'code': 201
              'favorite_key': key
              }