The app engine manual extensively discusses the use of the Key class (import javax.jdo.annotations.Key) for datastore operations, and yet when I try to persistent data using Key, app engine throws the exception: Caused by: javax.jdo.JDOUserException: Field "com.sis.app.server.DataModelMember.key" is declared as a reference type (interface/Object) but no implementation classes of "javax.jdo.annotations.Key" have been found. Any idea what is happening here with this "no source code" exception; otherwise, I have to create and manage my own keys which is a lot more coding during queries and updates. Thx!
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