class UrlSummary(ndb.Model):
"""Metadata about a URL."""
MAX_AGE = 60
url = ndb.StringProperty()
title = ndb.StringProperty()
when = ndb.FloatProperty()
class Message(ndb.Model):
"""Guestbook message."""
body = ndb.StringProperty()
when = ndb.FloatProperty()
userid = ndb.StringProperty()
class LogRecord(ndb.Model):
timestamp = ndb.FloatProperty()