Hi Richard,
RequestFactory doesn't yet support arrays. Use List<T> instead. Also
ensure that your Proxy doesn't expose the Objectify Key type, as only
entity types and a few value types are supported until 2.1.1.
/dmc
On Tue, Nov 23, 2010 at 2:23 PM, Richard Berger <richardlan...@gmail.com> wrote:
> Goal: Save an object an associated collection
> How to do this with Request Factory and Objectify?
>
> I have an object that looks like:
> Commitment.java (in com.br.commit2.server.domain)
> public class Commitment {
> �...@id private Long id;
> private String title;
> // other simple fields
> private Integer version;
>
> // Methods exposed through Request factory
>
> // Getters, setters
> }
>
> Since I am trying to use RequestFactory, I also have:
> CommitmentProxy.java (in com.rb.commit2.shared)
> @ProxyFor (Commitment.class)
> public interface CommitmentProxy extends EntityProxy {
> public String getTitle();
> public void setTitle(String title);
> // rest of interface
> }
>
> Also have
> public interface CommitmentSystemRequestFactory extends RequestFactory
> {
> CommitmentRequest commitmentRequest();
> ...
> }
>
> And...
> @Service (Commitment.class)
> public interface CommitmentRequest extends RequestContext {
> Request<Long> countCommitments();
> // Other methods, implemented in Commitment.java above)
> }
>
> Finally, in my Commit2Binder.java, I have code that works to create a
> commitment when a button is clicked (this is just a test app)
> CommitmentRequest request = requestFactory.commitmentRequest();
> CommitmentProxy newCommitment =
> request.create(CommitmentProxy.class);
> newCommitment.setTitle("Test Objectify title");
> newCommitment.setDescription("Test Objectify Description");
> Request<Void> createReq =
> request.persistCommitment().using(newCommitment);
>
> createReq.fire(new Receiver<Void>() {
> �...@override
> public void onSuccess(Void response) {
> Window.alert("Created Commitment!");
>
> }
> });
>
> Surprisingly enough it all works fine. Now, I want to model a new
> object, a user with two collections of the Commitment object above.
> These are unowned collections. Following the objectify-appengine/
> wiki//IntroductionToObjectify#Relationships, I create CommitUser
>
> public class CommitUser implements Serializable {
> private static final long serialVersionUID = 1L;
> �...@id private Long id;
> private String googleEmail;
> ...
> private Key<Commitment>[] dueByMeCommitments;
> private Key<Commitment>[] dueToMeCommitments;
> }
>
> And the related CommitUserProxy
> @ProxyFor (CommitUser.class)
> public interface CommitUserProxy extends EntityProxy {
> public int getUserLevel();
> ....
> }
>
> And a new Request Interface
> @Service (CommitUser.class)
> public interface CommitUserRequest extends RequestContext {
> InstanceRequest<CommitUserProxy, Void> persistCommitUser();
> }
>
> And add a line to my CommitmentSystemRequestFactory.java for
> CommitUserRequest.
>
> Now, in my Commit2Binder, I want to create a new CommitUser - empty
> collections are fine to start with. But the code I have, essentially
> the code that works for creating a Commitment, fails. The code is:
> CommitUserRequest request = requestFactory.commitUserRequest();
> CommitUserProxy newCommitUser =
> request.create(CommitUserProxy.class);
> newCommitUser.setGoogleNickname("Richard");
> newCommitUser.setGoogleEmail("richardlan...@gmail.com");
> newCommitUser.setUserLevel(1);
> newCommitUser.setDueByMeCommitments(null);
> newCommitUser.setDueToMeCommitments(null);
> Request<Void> createReq =
> request.persistCommitUser().using(newCommitUser);
>
> createReq.fire(new Receiver<Void>() {
> �...@override
> public void onSuccess(Void response) {
> Window.alert("Created User!");
>
> }
> �...@override
> public void onFailure(ServerFailure error) {
> Window.alert(error.getMessage());
> }
> });
> ;
>
> The failure occurs when the rquest is fired and the error is:
> Caused by: java.lang.ClassCastException:
> sun.reflect.generics.reflectiveObjects.GenericArrayTypeImpl cannot be
> cast to java.lang.Class
> If I remove the calls to setDueByMeCommitments, setDueToMeCommitments
> I get the same error.
>
> I start to look at other ideas, but it starts to seem that I am going
> down the wrong path, since this should be something relative. Any
> pointers and thoughts would be greatly appreciated.
>
> Thanks!
> RB
>
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