I posted on similar issues here - http://groups.google.com/group/google-appengine-java/browse_thread/thread/e81658b708e92d9e
After spending (wasting) several days experimenting w/ the combination of detached and owned entities, my apps now work fine, but I always need to call JDOHelper.makeDirty before persisting to get things working properly. Otherwise I get special-case bugs saving an empty list, or a list w/ one item in it. So try JDOHelper.makeDirty(enhtityInstance, propertyNameAsString); and let us know if that helps. J On Sep 8, 5:50 am, androidDeveloper <stepmas...@googlemail.com> wrote: > Hi all, > > I read the post > > http://groups.google.com/group/google-appengine-java/browse_thread/th... > > which describes a problem with the local datastore and empty lists. > > This problem seems to be fixed. But maybe I have found another one. > > I have a list "List<String> favoritesUserId" in a index class to which > I can add or remove keys (encoded Strings). So there is the > possibility, that the list gets empty, after all items are removed. > The class is a child of another class. The structure is kind of the > index-class pattern introduced by Bret Slatkin (Building Scalable, > complex Apps on App engine) > > So here is the problem. When I try to save an item in the list, it > works fine. Removing items works fine too, as long the list after > removing the item is not empty. When I remove the last item and save > the object, the last item stays in the list. I have not tried it in > production yet, cause I am not ready for testing prod. Maybe this is a > local problem with the SDK? > > Does anyone know what the solution to this problem is? > > Thanks! -- 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-j...@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.
