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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