It sounds like you need a keyOfA in class B with the extension annotation so A B and C all end up in the same entity group. If you are actually only updating B and C together in a transaction, the extension annotation should only be necessary on the keyOfB member in class C.
There is also some strange behavior that I've noticed when I retrieve an existing entity from the datastore that has one of those extension members that I cannot update it and persist it back unless I set the field to null. However, it remains in the right entity group. I think it just can't be set again after it was created once since the entity group is unchangeable. -- 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 [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
