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[eclipselink-users] detached object changes aren't completely merged?
|
Hi!
I have some trouble with merging detached objects. I have a client server
scenario where I send collections of persisted objects to a client, so the
user is able to do changes on the objects in a simple gui.
When the user changes a name (simple string) and a relation to an other
persisted object, the name change isn't correctly merged!?!?
...
// refresh the parent and
em.refresh(mom);
// detach parent e.g. send over network to client
em.detach(mom);
// query a child
child = em.createQuery("select c from Child c where c.name = 'son'",
Child.class).getSingleResult();
// detach it e.g. send over network to client
em.detach(child);
em.close();
// SERVER-SIDE-END
///////////////////////////////////////////////////
// CLIENT-SIDE
///////////////////////////////////////////////////////
System.out.println("selected '" + child + "' for change");
final String MISSING_CHANGED_STRING = "baby";
child.name = MISSING_CHANGED_STRING;
child.parent = mom;
final String PARENT_NAME_STRING = child.parent.name;
// CLIENT-SIDE-END
///////////////////////////////////////////////////
// SERVER-SIDE
///////////////////////////////////////////////////////
em = emf.createEntityManager();
// try to merge changes
transaction = em.getTransaction();
transaction.begin();
System.out.println(child + " changed");
child = em.merge(child);
System.out.println(child + " merged");
transaction.commit();
em.close();
emf.close();
// the parent is fine:
assert child.parent.name.equals(PARENT_NAME_STRING);
// expected behavior:
assert child.name.equals(MISSING_CHANGED_STRING) : "expected name:
'" + MISSING_CHANGED_STRING
+ "' and not '" + child.name + "'";
The complete sources are here in the attached zip file.
src.zip <http://eclipse.1072660.n5.nabble.com/file/n156056/src.zip>
Any HELP is appreciated!!!
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