[hibernate-issues] [Hibernate-JIRA] Resolved: (HHH-1654) Cascade problem when bidir OneToMany overlaps with OneToOne

[Gail Badner (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-1654?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gail Badner resolved HHH-1654.
------------------------------

    Resolution: Rejected
      Assignee: Gail Badner

> Cascade problem when bidir OneToMany overlaps with OneToOne
> -----------------------------------------------------------
>
>                 Key: HHH-1654
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1654
>             Project: Hibernate Core
>          Issue Type: Bug
>         Environment: JBoss 4.0.4RC1, any database
>            Reporter: Jeff Schnitzer
>            Assignee: Gail Badner
>         Attachments: ContainerTest6-DenseRelationships.zip
>
>
> Given the following relationships:
> Parent has N children (one-to-many)
> Child has 1 parent (many-to-one, the bidir relationship)
> Parent has 1 "default" child (one-to-one)
> Hibernate is unable to persist this.  The code I expect to work:
> 		Parent p = new Parent();
> 		p.setChildren(new HashSet<Child>());
> 		
> 		Child ch = new Child(p);
> 		p.getChildren().add(ch);
> 		p.setDefaultChild(ch);
> 		
> 		this.em.persist(p);
> However, it's possible to make it work by relaxing the NOT NULL constraint on the defaultChild relationship and rearranging the order of method calls:
> 		Parent p = new Parent();
> 		p.setChildren(new HashSet<Child>());
> 		
> 		Child ch = new Child(p);
> 		p.getChildren().add(ch);
> 		
> 		this.em.persist(p);
> 		
> 		p.setDefaultChild(ch);
> Of course, Hibernate works fine the one-to-one relationship is eliminated.
> Here is the exception produced by the first code sequence:
> Caused by: org.hibernate.PropertyValueException: not-null property references a null or transient value: test.Child.parent
> 	at org.hibernate.engine.Nullability.checkNullability(Nullability.java:72)
> 	at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:265)
> 	at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:167)
> 	at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:101)
> 	at org.hibernate.event.def.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:131)
> 	at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:87)
> 	at org.hibernate.impl.SessionImpl.firePersist(SessionImpl.java:633)
> 	at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:625)
> 	at org.hibernate.engine.CascadingAction$8.cascade(CascadingAction.java:202)
> 	at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:213)
> 	at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:157)
> 	at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:108)
> 	at org.hibernate.engine.Cascade.cascade(Cascade.java:248)
> 	at org.hibernate.event.def.AbstractSaveEventListener.cascadeBeforeSave(AbstractSaveEventListener.java:385)
> 	at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:242)
> 	at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:167)
> 	at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:101)
> 	at org.hibernate.event.def.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:131)
> 	at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:87)
> 	at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:38)
> 	at org.hibernate.impl.SessionImpl.firePersist(SessionImpl.java:642)
> 	at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:616)
> 	at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:620)
> 	at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:127)
> 	at org.jboss.ejb3.entity.InjectedEntityManager.persist(InjectedEntityManager.java:141)
> 	at test.GoBean.go(GoBean.java:30)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:585)
> 	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:109)
> 	at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
> 	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
> 	at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
> 	... 41 more
> A test case is attached.

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