http://js-mind.appspot.com/Google App Engineすげー簡単。今後jsmindはこれで開発をしよう。

BadValueError: Property content is 509 bytes long; it must be 500 or less. Consider Text instead, which can store strings of any length.Types and Property Classes - Google App Engine - Google Code http://code.google.com/intl/ja/appengine/d…