I am using GAE SDK 1.5, running locally, I have entity id declared as:
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
private Long id;
and transaction explicitly disabled in persistence.xml
<property name="datanucleus.appengine.autoCreateDatastoreTxns"
value="false"/>
but after new object is persisted by calling
entityManager.persiste(new object), the id value is null, the session
can't be flushed because it is not in transaction, and I wouldn't be
able to get the newly created id value.
if transaction is enabled, GAE entity group will prevent entity
modification across different entity groups, which mean I have to make
major modification to the codes; without transaction, I can't flush or
commit and wouldn't be able to get the newly created entity key...
am I doing something wrong? how do you get the new identity value
after persist without transaction?
thanks.
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