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From Marc Logemann ...@logemann.org>
Subject Re: cant update a detached instance
Date Mon, 18 Aug 2008 16:04:02 GMT
>

see comments inline...

> Hi,
>   Possibility:
>
>> Box box = boxDao.findNextFreeBox(BoxType.STANDARD); //
>  Does this 'box' an existing persistent box, possibly with _version  
> = 1?
>

correct.


>> where boxDao.save() is only a wrapper to em.persist(object)
> then this box should be merged. Attempted to persist() will hit the
> DuplicateKey exception at database which is getting translated to
> EntityExistsException to the application.
>

Ok. this worked of course. Then i need to ask inside the save() method  
if this object is detached or not and then do either a em.merge() or a  
em.persist() correct?

Marc

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