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 <[email protected]> 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 <[email protected]> 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 -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
