@staticmethod
  def getKeyName(username, date, blob_key):

    sep = FileMetadata.__SEP
    return str(username + sep + str(date) + sep + blob_key)
Returns the internal key for a particular item in the database.
dataset/ETHPy150Open GoogleCloudPlatform/appengine-mapreduce/python/demo/main.py/FileMetadata.getKeyName