code: def blocking_save(self, query_dict=None, meta=None, index_fields=None):
          
          query_dict = query_dict or {}
          for query in query_dict:
              self.setattr(query, query_dict[query])
  
          self.save(meta=meta, index_fields=index_fields)
          while not self.objects.filter(key=self.key, **query_dict).count():
              time.sleep(0.3)
          return self
docs: Saves object to DB. Waits till the backend properly indexes the new object.
  
          Args:
              query_dict(dict) : contains keys - values of  the model fields
              meta (dict): JSON serializable meta data for logging of save operation.
                  {'lorem': 'ipsum', 'dolar': 5}
              index_fields (list): Tuple list for indexing keys in riak (with 'bin' or 'int').
                  bin is used for string fields, int is used for integer fields.
                  [('lorem','bin'),('dolar','int')]
  
  
          Returns:
              Model instance.