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From rgarret <RGAR...@co.pierce.wa.us>
Subject RE: ON DELETE CASCADE causes OptimisticLockingException
Date Mon, 02 Jun 2008 17:25:58 GMT

I started OPENJPA-235 some time ago and it has yet to be resolved. I haven't
had time to inquire about it but I really wish it would get paid some
attention. It seems to me that properly managing foreign/unique keys during
update/delete operations is fairly important. 


roger.keays wrote:
> 
> It seems that the new ConstraintUpdateManager, which was added to openjpa
> to fix NOT NULL foreign keys is the cause of this problem:
> 
> https://issues.apache.org/jira/browse/OPENJPA-235
> 
> The old OperationOrderUpdateManager still works in the same way as 0.9.7
> and can be enabled with
> 
> openjpa.jdbc.UpdateManager=operation-order
> 
> Marc LaPierre wrote:
>> 
>> From what I understand, JPA tries to delete the parent entity before the
>> child entity, which is incorrect. There is a JIRA issue for this:
>> 
>> http://issues.apache.org/jira/browse/OPENJPA-39
>> 
>> It's been marked as "fixed" but I still see that behavior. I ended up
>> manually doing the deletes when required instead of relying on cascade.
>> 
>> Marc
>> 
>> 
>> -----Original Message-----
>> From: roger.keays [mailto:roger.keays@ninthavenue.com.au]
>> Sent: Wednesday, March 05, 2008 7:55 AM
>> To: users@openjpa.apache.org
>> Subject: Re: ON DELETE CASCADE causes OptimisticLockingException
>> 
>> 
>> 
>> roger.keays wrote:
>>> Since upgrading to 1.0.0, all my CASCADE DELETE foreign key actions
>> cause
>>> an OptimisticLockingException when you delete the owning entity. This
>>> happens even if @ForeignKey describes the delete action correctly.
>>>
>> This is still a problem in 1.0.2 with postgresql. Can anybody help me? I
>> tried
>> 
>> openjpa.jdbc.UpdateManager=org.apache.openjpa.jdbc.kernel.ConstraintUpda
>> teManager
>> 
>> since the foreign keys cause the problem, but it doesn't help. Also, I
>> noticed the openjpa.Compatibility config option, but no docs on what
>> values
>> are allowed here. The working version of openjpa is 0.9.7. Is it
>> possible to
>> imitate that version?
>> 
>> Thanks in advance,
>> 
>> Roger
>> 
>> 
>>> e.g
>>>
>>> @Entity A {
>>>   @OneToMany(cascade=CascadeType.ALL, mappedBy="a")
>>>   List b;
>>> }
>>>
>>> @Entity B {
>>>   @ForeignKey(deleteAction=ForeignKeyAction.CASCADE)
>>>   @ManyToOne(cascade=CascadeType.MERGE)
>>>   A a;
>>> }
>>>
>>> If I delete A when there is a cascading foreign key the exception is
>>> thrown. Without the key, there is no exception.
>>>
>>> Roger
>>>
>> 
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>> n-tp14308483p15849421.html
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>> 
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> 
> 

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