FYI...
This issue was resolved by changing the last line
from this:
List<Group> groups = (List<Group>) q.execute(group_keys);
to this:
List<Group> groups = (List<Group>)
q.execute(Arrays.asList(group_keys));
Thanks,
Jason
On Oct 2, 5:55 pm, "hendrix.jason" <hendrix.ja...@gmail.com> wrote:
> 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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