new_contents: # -*- coding: utf-8 -*-
  from google.appengine.ext import db
  
  class Page(db.model):
      title = db.StringProperty(require=True)
      body = db.TextProperty()
      updated_at = db.DateTimeProperty(required=True)
  
  class History(db.model):
      title = db.StringProperty(require=True)
      body = db.TextProperty()
      updated_at = db.DateTimeProperty(required=True)
  
  
subject: create models