code: def get_relation_count_query(self, query, parent):
          
          query = super(MorphToMany, self).get_relation_count_query(query, parent)
  
          return query.where('%s.%s' % (self._table, self._morph_type), self._morph_class)
docs: Add the constraints for a relationship count query.
  
          :type query: eloquent.orm.Builder
          :type parent: eloquent.orm.Builder
  
          :rtype: eloquent.orm.Builder