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 > > -- 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 google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.