I still haven't figured this one out. Am I doing something wrong or
there's a small bug in the JDO GAE implementation?
Btw, I saw all the documentation has been changed to LowLevelAPI. Will
JDO loose support sometimes soon?
Thanks,
Cosmin
On Mar 6, 5:07 pm, Cosmin Stefan <cosmin.stefandob...@gmail.com>
wrote:
> Hey,
>
> I cannot use a transaction as I need to change multiple entries (as u
> see, for each BigClass participant i have to remove an object from the
> collection).
>
> Regarding the pm.makePersistent() call, I have tried with it before
> and it didn't do anything different. Plus that on the GAE
> documentation page they say it's not needed, as the pm tracks all the
> changes.
>
> I have discovered another thing related to this problem. As I've shown
> you, in the same persistence call I try to do these (remove smth from
> the collection) changes and I also modify other objects. The weird
> fact is that the last changes I make are persisted, while the others
> aren't. Why is that?
>
> Regarding JPA I'll look into it, but it's kind of difficult as I
> already have a huge part of my code written with JDO.
>
> Anyway, looking forward to hearing new suggestions!
>
> Thanks,
> Cosmin
>
> On Mar 1, 6:59 pm, Ian Marshall <ianmarshall...@gmail.com> wrote:
>
> > Hi Cosmin,
>
> > I do not see any calls to
>
> > pm.makePersistent(...);
>
> > I use this to persist newly-created persistent instances.
>
> > I know that you do not use transactions, but I do. Within an active
> > transaction, one can update persistent instances and even persist or
> > delete entity group child instances without calling
>
> > pm.makePersistent(...);
>
> > Have you looked at the GAE persistence blog of Max Ross of Google?
> > There are some excellent working examples there...
>
> > Ian
>
> > On Feb 28, 6:55 pm, Cosmin Stefan <cosmin.stefandob...@gmail.com>
> > wrote:
>
> > > So no ideea anyone?
>
> > > On Feb 25, 11:42 pm, Cosmin Stefan <cosmin.stefandob...@gmail.com>
> > > wrote:
>
> > > > Hey,
>
> > > > I have an issue while trying to update one object in a collection,
> > > > using JDO.
>
> > > > Here are the facts:
> > > > o i have a class (let's call it BigClass), that has an embedded
> > > > class(SmallClass) containing an ArrayList.
> > > > o I DONT use/need a transaction
> > > > o I query the database to get a List of BigClass items that should
> > > > be modified. I iterate through each of them and I...
> > > > o I remove an element from the list in the SmallClass embedded in
> > > > the current BigClass, the changes are not ALWAYS persisted
> > > > o if I print (log) the object after the change, it looks modified,
> > > > but if i check the DataViewer, the object was not updated
> > > > o i even tried using JDOHelper.makeDirty on the BigClass, with the
> > > > fieldName SmallClass, and it still doesn't work.
>
> > > > Some relevant code:
>
> > > > Query q =
> > > > pm.newQuery(BigClass.class,"id==:ids");
> > > > List<BigClass>
> > > > participatingUsers=(List<BigClass>)
> > > > q.execute(participantIDs);
>
> > > > //Update the participants
> > > > ListIterator<BigClass>
> > > > it=participatingUsers.listIterator();
> > > > BigClass participant;
> > > > boolean modified;
> > > > while(it.hasNext())
> > > > {
> > > > participant=it.next();
> > > > participant.list.remove(smth);
>
> > > > JDOHelper.makeDirty(participant,"collection");
> > > > }
> > > > ....
> > > > modify other objects
> > > > ....
> > > > pm.close()
>
> > > > Another thing is that some of the changes I make after this part are
> > > > persisted...
>
> > > > So, if you have any suggestions, shoot pls!
>
> > > > Cosmin
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