Didier, Thanks for the suggestion, but I have deleted the datastore and tried again with a fresh datastore, and the same thing happens.
Thanks, Jason On Sep 29, 10:23 pm, Didier Durand <durand.did...@gmail.com> wrote: > Hello, > > Readhttp://code.google.com/appengine/docs/java/datastore/dataclasses.html... > > one possibility that 1 see: a change of type / format that you made to > some prop of your object and you access old entities in the datastore > with the new code. This may generate such an exception if DS cannot > convert old format to new one. > > didier > > On Sep 30, 1:16 am, "hendrix.jason" <hendrix.ja...@gmail.com> wrote: > > > > > > > > > What could this error mean: > > > java.lang.ClassCastException: > > [Lcom.google.appengine.api.datastore.Key; cannot be cast to > > com.google.appengine.api.datastore.Key > > > It's happening on the last line of this code: > > > PersistenceManager pm2 = PMF.get().getPersistenceManager(); > > Key k = > > KeyFactory.createKey(User.class.getSimpleName(),Long.parseLong(Key)); > > User u = pm2.getObjectById(User.class, k); > > > Long[] group_array = u.getGroups(); > > Key[] group_keys = new Key[group_array.length]; > > int c = 0; > > while(c < group_array.length){ > > group_keys[c] = > > KeyFactory.createKey(Group.class.getSimpleName(), > > group_array[c]); > > c++; > > } > > > javax.jdo.Query q = > > pm2.newQuery(Group.class,"key.contains(:key)"); > > List<Group> groups = (List<Group>) q.execute(group_keys); -- 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.
