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.