OpenJPA persist(...) doesn't assign the Id to the Entity instance

[Giovanni Azua]

hi,

I have a use-case that follows a similar pattern to what's written in the
snippet below. My problem is that the assertion fails meaning once the
Entity instance is persisted in the database by calling persist, that
instance does not get the Id assigned (I also tried calling refresh on that
instance). I have this situation only with OpenJPA though, using Hibernate
as JPA provider works fine.

Maybe is a missing OpenJPA property somewhere in the persistence.xml?

I will be trying meantime to switch to some other provider to test.

TIA,
regards,
Giovanni

EntityManager entityManager = ...
entityManager.getTransaction().begin();
Person myPerson = new Person("Pepito", 19);
entityManager.persist(myPerson);

assert myPerson.getId() != null : "Person Id must not be null";

entityManager.getTransaction().commit();

persistence.xml:
http://perfectjpattern.svn.sourcefo...esources/META-INF/persistence.xml?view=markup
orm.xml:
http://perfectjpattern.svn.sourcefo...c/test/resources/META-INF/orm.xml?view=markup
Person.java:
http://perfectjpattern.svn.sourcefo...ern/example/datamodel/Person.java?view=markup

 

[Giovanni Azua]

I already found what the problem was.

I was using IDENTITY Id generation strategy and until the insert is not
actually commited, the Id generation and assignment to the Entity in memory
will not occur (there are no records commited yet, maybe not even flushed),
therefore doing a simple commit resolved the problem.

regards,
Giovanni