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I am sorry I am a bit behind on posting the techlist questions, but I have been a bit busy lately with tons of different projects.
This time we have a hibernate question..
| From | Lars |
|---|---|
| Subject | Hibernate question |
| Date | August 27, 2007 16:30:26 |
Hi, I have a Hibernate question. This is the situation (I ommited rest of annotations etc): [java]class Organisation { @OneToMany(cascade=CascadeType.ALL) @Cascade(org.hibernate.annotations.CascadeType.DELETE_ORPHAN) private List allContactDetails; } class AbstractContactDetails { } [/java] It is a uni-directional one to many. Now I want to delete the Organisation and that should cascade to the allContactDetails. That's why I added the Hibernate specific annotation "@Cascade(org.hibernate.annotations.CascadeType.DELETE_ORPHAN)". In my test code I then do: organisation.setAllContactDetails(null); organisationDao.update(organisation); organisationDao.getHibernateTemplate().flush(); (The flush is there so I can test after the last call as Hibernate only synches with the database with an explicit flush or a select). This results in the following exception: Caused by: org.hibernate.HibernateException: A collection with cascade="all-delete-orphan" was no longer referenced by the owning entity instance: domain.Organisation.allContactDetails I found that a bit strange because I think this is the whole idea behind the all-delete-orphan thing.... I am adding it so Hibernate deletes my orphans and now it complains that it is no longer referenced... Any idea's? We are using Hibernate 3.2.0.ga and Java 5. Lars | |
| From | Silvester van der Bijl |
|---|---|
| Subject | RE: Hibernate question |
| Date | August 27, 2007 16:33:19 |
Lars, As far as I know you shouldn't set the collection to null. Does it work when you just clear the list? Don't now how Hibernate handles this, but I'm guessing it needs a reference to the collection to be able to detect which items should be deleted (the orphans). Silvester | |
| From | Lars Vonk |
|---|---|
| Subject | RE: Hibernate question |
| Date | August 27, 2007 16:38:06 |
Great, thanks Silvester that indeed solved it. Lars | |
