Can you post the JPA version of your entity? Filtered queries should work on
JPA objects, but just for a sanity check let's see if there's anything that
jumps out at us.
I've just built something similar, and if I pass a Key to:
query.setParameter("key", key);
This works correctly, though if I pass the String key to it
query.setParameter("key", "someLongString");
It returns an empty list. Could this be what is happening?
On Thu, Nov 19, 2009 at 9:26 PM, lp <[email protected]> wrote:
> hi all,
>
> i have a JDO query that i would like to port to JPA.
>
> Friend Entity
> @PersistenceCapable(identityType=IdentityType.APPLICATION)
> public class Friend {
>
> @PrimaryKey
> @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
> private Key key;
>
> @Persistent
> private String lastName;
>
> @Persistent
> public int crud;
>
> @Persistent
> private String firstName;
>
> @Persistent(defaultFetchGroup = "true")
> private Collection<Key> friends;
>
>
> //JDO
> javax.jdo.Query query = pm.newQuery(Friend.class);
> Key myKey = user2.getKey();
> query.declareParameters("com.google.appengine.api.datastore.Key
> myKey");
> query.setFilter("friends == myKey");
> query.setOrdering("crud ASC, lastName ASC, firstName ASC");
> List<Friend> friendList = (List<Friend>) query.execute(myKey);
>
>
> The problem i am having is with the query.setFilter("friends ==
> myKey" ) portion.
>
> //JPA
> javax.persistence.Query query = em.createQuery("select from
> Friend where friends=:key");
> query.setParameter("key", user2.getKey());
> List<Friend> friendList = (List<Friend>) query.getResultList();
>
> however the resultlist returns 0.
>
> any help is appreciated
>
> -lp
>
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>
--
Ikai Lan
Developer Programs Engineer, Google App Engine
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