appengine.py 文件源码

def __init__(self, model, key_name, property_name, cache=None):
    """Constructor for Storage.

    Args:
      model: db.Model, model class
      key_name: string, key name for the entity that has the credentials
      property_name: string, name of the property that is a CredentialsProperty
      cache: memcache, a write-through cache to put in front of the datastore
    """
    self._model = model
    self._key_name = key_name
    self._property_name = property_name
    self._cache = cache