Same thing, but...
I tried wrapping both the initial makepersistent() call and then the
query in transactions, without changing anything else:
I get this, which I hope is related to my original issue:
javax.jdo.JDOFatalUserException: Illegal argument
NestedThrowables:
java.lang.IllegalArgumentException: can't operate on multiple entity
groups in a single transaction. found both Element {
type: "GoogleAccountsUser " //This is the specific subclass of User
id: 11
}
and Element {
type: "Deck"
name: "_8ad07638-b233-4fef-9a7f-1cfbad4eaab3"
}
Now why would it think that decks and users are in different entity
groups...
On Mar 7, 3:05 pm, Toby <toby.ro...@gmail.com> wrote:
> Okay, I see. In my case it is a List not a Set ... but I think that
> really makes no difference.
> What I think is strange is that you initialize the fields:
> @Persistent(defaultFetchGroup = "true", mappedBy = "_Parent")
> @Element(dependent = "true")
> private Set<Card> _Cards = new HashSet<Card>();
>
> maybe that causes the _Cards to be reinitialized when the Entity is
> deserialized. Can you try to remove that?
>
> Cheers,
> Toby
>
> On Mar 7, 2:19 pm, tempy <fay...@gmail.com> wrote:
>
>
>
> > Thanks for the suggestion...
>
> > I did try that exact code and sad to say it didn't help, just returned
> > a 0-size collection. I'm still trying to figure this out...
>
> > On Mar 7, 10:58 am, Toby <toby.ro...@gmail.com> wrote:
>
> > > Hello Mike,
>
> > > have you tried touching them before you close the query?
> > > I had similar problem and only solved it by calling the getter for the
> > > owned collection before detaching the results.
>
> > > if (results.iterator().hasNext()) {
> > > for (Product fp : results) {
> > > //this is to force the collections to be detached
> > > fp.getItems();
> > > }
> > > return pm.detachCopyAll(results);
> > > ...
>
> > > I found no better way to do that. I actually started managing
> > > relationships by hand now because you have more control and more
> > > performance especially if you do not always need the child
> > > collections.
>
> > > But maybe there is also a way to trigger that through an annotation.
>
> > > Cheers,
> > > Toby
>
> > > On Mar 7, 1:46 am, tempy <fay...@gmail.com> wrote:
>
> > > > I have the following 3-part owned relationship...
>
> > > > Users, the root entity, have a collection of Decks, as such (I am not
> > > > including the specific subclass of User as it doesn't seem to be
> > > > relevant):
>
> > > > @PersistenceCapable(identityType = IdentityType.APPLICATION)
> > > > @Inheritance(strategy = InheritanceStrategy.SUBCLASS_TABLE)
> > > > public abstract class User {
> > > > @PrimaryKey
> > > > @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
> > > > protected Key _ID;
>
> > > > @Persistent
> > > > protected String _UniqueIdentifier;
>
> > > > @Persistent(defaultFetchGroup = "true", mappedBy = "_Owner")
> > > > @Element(dependent = "true")
> > > > protected Set<Deck> _Decks;
>
> > > > protected KleioUser()
> > > > {
> > > > }
>
> > > > }
>
> > > > Each Deck has a collection of Cards, as such:
> > > > @PersistenceCapable
> > > > public class Deck {
> > > > @PrimaryKey
> > > > @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
> > > > private Key _ID;
>
> > > > @Persistent
> > > > String _Name;
>
> > > > @Persistent(defaultFetchGroup = "true", mappedBy = "_Parent")
> > > > @Element(dependent = "true")
> > > > private Set<Card> _Cards = new HashSet<Card>();
>
> > > > @Persistent
> > > > private Set<String> _Tags = new HashSet<String>();
>
> > > > @Persistent
> > > > private KleioUser _Owner;
>
> > > > }
>
> > > > And finally, each card:
>
> > > > @PersistenceCapable
> > > > public class Card {
> > > > @PrimaryKey
> > > > @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
> > > > private Key _ID;
>
> > > > �...@persistent
> > > > private Text _Question;
> > > > @Persistent
> > > > private Text _Answer;
> > > > @Persistent
> > > > private Deck _Parent;
>
> > > > }
>
> > > > I've only run this on the dev server. When I create a new user and
> > > > populate the corresponding decks and corresponding cards and then call
> > > > pm.makepersistent(user), everything looks fine and I can see all the
> > > > user, deck, and card entities in the development datastore. However,
> > > > when I try to retrieve a user with the following query:
>
> > > > Query query = _pm.newQuery(SpecificUser.class);
> > > > query.setFilter("_UniqueIdentifier == TheUser");
> > > > query.declareParameters("String TheUser");
>
> > > > try {
> > > > List<SpecificUser> results =
> > > > (List<SpecificUser>)query.execute(ID);
>
> > > > if(results.size() == 0)
> > > > return null;
> > > > else
> > > > return results.get(0);
>
> > > > } finally {
> > > > query.closeAll();
> > > > }
>
> > > > I get the user just fine, and all the user's corresponding decks. But
> > > > the decks have no cards. "Touching" the deck's cards collection with
> > > > a .size() method doesn't load the cards, just returns 0, nor does
> > > > setting the cards to the default fetch group. I also tried to set the
> > > > pm's fetchplan to -1, but that didn't have the desired effect either.
>
> > > > The weird thing is that if I persist the Deck without a parent user,
> > > > then I will get the deck back, along with all its cards, with no
> > > > problems.
>
> > > > I've tried a lot of other things too and I'm starting to run low on
> > > > ideas (and high on frustration), so any help would be appreciated.
>
> > > > Thanks,
> > > > Mike
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