Hello, I have the following classes:
------------------------------------ @PersistenceCapable(detachable = "true", identityType = IdentityType.APPLICATION) @Inheritance(customStrategy = "complete-table") public class Move implements Cloneable, Serializable { @PrimaryKey @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) @Extension(vendorName = "datanucleus", key = "gae.encoded-pk", value = "true") private String id; @Persistent(defaultFetchGroup = "true") @Embedded private DelayedEffect delayedEffect; } ----------------- @PersistenceCapable(identityType = IdentityType.APPLICATION, detachable = "true") @Inheritance(customStrategy = "complete-table") public abstract class DelayedEffect implements Serializable { @PrimaryKey @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) @Extension(vendorName = "datanucleus", key = "gae.encoded-pk", value = "true") protected String id; } ----------------- @PersistenceCapable(identityType = IdentityType.APPLICATION, detachable = "true") @Inheritance(customStrategy = "complete-table") public class SlowOpponentDelayedEffect extends DelayedEffect { @Persistent private int slowStrength; } ------------------------------------ When persisting the Move object (code snippet below), I get the following exception: java.lang.RuntimeException: Unable to locate com.fiveorbs.shared.models.SlowOpponentDelayedEffect.slowStrength in embedded meta-data map. This is most likely an App Engine bug. at org.datanucleus.store.appengine.DatastoreFieldManager.buildMappingConsumer(DatastoreFieldManager.java:1211) at org.datanucleus.store.appengine.DatastoreFieldManager.storeEmbeddedField(DatastoreFieldManager.java:984) at org.datanucleus.store.appengine.DatastoreFieldManager.storeObjectField(DatastoreFieldManager.java:810) ------------------------------------ final Move move = new Move(); final SlowOpponentDelayedEffect effect = new SlowOpponentDelayedEffect(); effect.setSlowStrength(5); move.setDelayedEffect(effect); final PersistenceManager pm = this.newPersistenceManager(); final Move persistent = pm.makePersistent(move); // Exception is thrown there ------------------------------------ Please note that I have no problem when trying to persist embedded fields that do not involve inheritance. I googled around, but could not find anyone with a similar issue (except here <http://hoangle.info/2010/07/06/jpa-in-google-app-engine-embedded/>, but it involves JPA). Does anyone has any clue as to what the problem could be? Thanks in advance for your help, -- seb -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.