Hello, I'm trying to persist a collection of embeddable/serializable objects as one of the fields in my entity. I've seen the trick where you wrap the list in another serializable class and store the whole thing as a lob, but that feels like a hack. As far as I can tell, the jpa way to do this is with an @ElementCollection(targetClass=BlaBlaBla.class) annotation on top of my list. I have annotated my BlaBlaBla class to be Embeddable.
Unfortunately, Appengine gives me this exception: javax.persistence.PersistenceException: Class "data.Contact" has collection field "properties" and this has no mapping in the table for the element class "data.EntityReference" org.datanucleus.jpa.NucleusJPAHelper.getJPAExceptionForNucleusException(NucleusJPAHelper.java: 264) org.datanucleus.jpa.EntityTransactionImpl.commit(EntityTransactionImpl.java: 122) org.datanucleus.store.appengine.jpa.DatastoreEntityTransactionImpl.commit(DatastoreEntityTransactionImpl.java: 55) Is the serializable class hack really necessary? Any help would be hot. Thanks! -- 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-j...@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.
