[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-3069) ObjectNotFoundException when proxy exists for super class of non existant joined subclass

[dan oxlade (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-3069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_29349 ] 

dan oxlade commented on HHH-3069:
---------------------------------

So this means having a proxy in the session of an entity that doesn't exist will break joined-subclasses.
This means that it is not at all possible to map relationships on an entity which has a joined subclass when you are aware that this entity may not exist and may be loaded lazily (by other relationships -not by the load method which is clearly misuse of the api-)

If this is the case I will close the issue. However it does seem somewhat limiting to complex object graphs.

> ObjectNotFoundException when proxy exists for super class of non existant joined subclass
> -----------------------------------------------------------------------------------------
>
>                 Key: HHH-3069
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3069
>             Project: Hibernate3
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 3.2.5
>            Reporter: dan oxlade
>
> A proxy of an entity which has a joined subclass is loaded into the session.
> If the proxy resolves to null, i.e the id of the proxy has no matching row in the database then future queries (in the same hibernate session) for any of the joined subclass entities will fail with ObjectNotFoundExceptions from the returnNarrowedProxy method of the DefaultLoadEventListener.
> the following test method in JoinedSubclassTest demonstrates the failing test:
> 	
> 	public void testProxyLoadedWhichDoesNotExist() throws Exception {
> 		Session s = openSession();
> 		Transaction t = s.beginTransaction();
> 		
> 		Long id = Long.valueOf(0L);
> 		Employee employee = (Employee) s.get(Employee.class,id);
> 		assertNull(employee);
> 		
> 		Person proxy = (Person) s.load(Person.class,id);
> 		assertNotNull(proxy);
> 		
> 		employee = (Employee) s.get(Employee.class,id);
> 		assertNull(employee);
> 		
> 		t.commit();
> 		s.close();
> 	}

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira