group_keys is an array containing several "Key" values. I want to
perform a query that returns all "Group" items that have a key value
that exists in the array "group_keys".
On Oct 2, 5:24 pm, Cyrille Vincey <crll...@gmail.com> wrote:
> As far as I know, the execute() method does not work with arrays arguments.
> Modify the declaration of your 'group_keys' from 'Key[]' to 'Key'.
> By the way, all query errors happen to be assigned to the 'execute' line in
> debug mode.
>
> Le 2 oct. 2010 à 19:41, "hendrix.jason" <hendrix.ja...@gmail.com> a écrit :
>
>
>
>
>
>
>
> > Cryille,
>
> > Using debug mode, I can see that the group_keys array is being
> > populated correctly.
>
> > The error is appearing on the last line:
> > List<Group> groups = (List<Group>) q.execute(group_keys);
>
> > Thanks,
> > Jason
>
> > On Sep 30, 3:41 am, Cyrille Vincey <crll...@gmail.com> wrote:
> >> Try :
> >> Key k = KeyFactory.createKey(User.class.getSimpleName(), Key.getId());
>
> >> Instead of :
> >> Key k = KeyFactory.createKey(User.class.getSimpleName(),
> >> Long.parseLong(Key));
>
> >> On 30/09/10 01:16, "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);
>
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