Re: [eclipselink-users] em.merge() ignore.

[Tom Ware <tom.ware@xxxxxxxxxx>]

If you merge a changed object, you need to commit the transaction before you 
will see the change.

If you are already committing the transaction, please post an example of the 
code you are running.

-Tom

Christian (VuuRWerK) Seifert wrote:
> If I understand EntityManager#merge(Object) correctly it just merge
> the Object with eclipselink but do not any database operation.
> To persist the changes you have to use EntityManager#persist(Object),
> thus eclipselink do update the already existing entry in the database.
>
> Hope that helps and please correct when I'm wrong ;)
>
> -- Christian
>
>
>
> 2011/4/20 José Arcángel Salazar Delgado <arcangel.salazar@xxxxxxxxxxxxxxxxxx>:
> > Hello.
> >
> > I'm having some troubles with a estrage behaviour.  This is my flow:
> >
> > 1.- Get a List of objects of a determinate type.
> > 2.- modify one atribute of the object.
> > 3.- make a for each and do em.merge(object).
> >
> > Unfortunately the em.merge is ignore (I kwno that because in the logging of
> > eclipselink I never see and UPDATE statement). If instead I use a JQPL update
> > query to do the modification, every thing works as espected.
> >
> > My question, what error  or problem can affect the em.merge to not work
> > silently (no exceptions are throws)??
> >
> > These methods worked well until I add to String atributes to the object.
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