Persist List of objects

Question

I got this \"javax.jdo.JDOFatalUserException: Error in meta-data for don.Comment.id: Cannot have a java.lang.String primary key and be a child object (owning field is d

Answer 1

For child classes the primary key has to be a com.google.appengine.api.datastore.Key value (or encoded as a string) see http://code.google.com/appengine/docs/java/datastore/creatinggettinganddeletingdata.html#Keys