app_util.py 文件源码

def update_model(old_model, new_model):
  """Updates a model.
  For all fields that are set in new_model, copy them into old_model.

  Args:
    old_model: The ndb model object retrieved from the datastore.
    new_model_dict: A json object containing the new values.
  """

  for k, v in new_model.to_dict().iteritems():
    if type(getattr(type(new_model), k)) != ndb.ComputedProperty and v is not None:
      setattr(old_model, k, v)