Try making the parent's primary key be Key instead of String.
Eugene Kuleshov wrote:
> I am using the app engine SDK 1.3.0 with the latest Google Eclipse
> plugin.
>
> Currently, in order to be able to run queries on attributes of the
> parent object I have to embed parent object into a child. So, I have
> created the following classes
>
> @PersistenceCapable(identityType = IdentityType.APPLICATION)
> public class Parent {
> @PrimaryKey @Persistent String parentName;
> @Persistent(mappedBy = "parent") List<Child> children = new
> ArrayList<Child>();
>
> public Parent(String parentName) { this.parentName = parentName; }
> public void setParentName(String parentName) { this.parentName =
> parentName; }
> public String getParentName() { return parentName; }
> public List<Child> getChildren() { return children; }
> public void addChild(Child child) {
> child.setParent(this);
> children.add(child);
> }
> }
>
> @PersistenceCapable(identityType = IdentityType.APPLICATION)
> public class Child {
> @PrimaryKey
> @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) Key
> childKey;
> @Persistent String childName;
>
> @Embedded(
> members = { @Persistent(name = "parentName", column =
> "childParentName") },
> ownerMember = "children")
> @Persistent Parent parent;
>
> public Child(String childName) { this.childName = childName; }
> public void setChildName(String childName) { this.childName =
> childName; }
> public String getChildName() { return childName; }
> public void setParent(Parent parent) { this.parent = parent; }
> public Parent getParent() { return parent; }
> }
> and then I created a simple test to verify if I can persist and run
> queries on those objects:
>
> public class ParentTest {
> public static void main(String[] args) {
> Parent parent1 = new Parent("parent1");
> parent1.addChild(new Child("child1"));
> parent1.addChild(new Child("child2"));
>
> Parent parent2 = new Parent("parent2");
> parent2.addChild(new Child("child3"));
>
> ApiProxy.setEnvironmentForCurrentThread(new TestEnvironment());
> ApiProxy.setDelegate(new ApiProxyLocalImpl(new File(".")) { });
>
> ApiProxyLocalImpl proxy = (ApiProxyLocalImpl) ApiProxy.getDelegate
> ();
> proxy.setProperty(LocalDatastoreService.NO_STORAGE_PROPERTY,
> Boolean.TRUE.toString());
>
> PersistenceManagerFactory pmf =
> JDOHelper.getPersistenceManagerFactory("transactions-optional");
> PersistenceManager pm = pmf.getPersistenceManager();
> Transaction tx = pm.currentTransaction();
> try {
> tx.begin();
> pm.makePersistent(parent1);
> tx.commit();
>
> tx.begin();
> pm.makePersistent(parent2);
> tx.commit();
>
> Query query2 = pm.newQuery(Child.class);
> query2.setFilter("parent.parentName==parentNameParam");
> query2.declareParameters("java.lang.String parentNameParam");
> List<Child> results2 = (List<Child>) query2.executeWithArray
> ("parent1");
> System.err.println(results2);
> } finally {
> if (tx.isActive()) {
> tx.rollback();
> }
> pm.close();
> }
> }
> }
>
> The DataNucleus Enhancer runs ok on the above code, but when I run
> my test app, I am getting an IndexOutOfBoundException from somewhere
> in the DataNucleus internals:
>
> Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
> at org.datanucleus.store.appengine.DatastoreTable.initializeNonPK
> (DatastoreTable.java:356)
> at org.datanucleus.store.appengine.DatastoreTable.buildMapping
> (DatastoreTable.java:285)
> at org.datanucleus.store.appengine.DatastoreManager.buildStoreData
> (DatastoreManager.java:405)
> at org.datanucleus.store.appengine.DatastoreManager.newStoreData
> (DatastoreManager.java:363)
> at org.datanucleus.store.AbstractStoreManager.addClasses
> (AbstractStoreManager.java:788)
> at org.datanucleus.store.AbstractStoreManager.addClass
> (AbstractStoreManager.java:759)
> at org.datanucleus.store.mapped.MappedStoreManager.getDatastoreClass
> (MappedStoreManager.java:358)
> at org.datanucleus.store.appengine.DatastoreManager.getDatastoreClass
> (DatastoreManager.java:631)
> at
> org.datanucleus.store.appengine.DatastoreFieldManager.buildMappingConsumer
> (DatastoreFieldManager.java:1008)
> at
> org.datanucleus.store.appengine.DatastoreFieldManager.buildMappingConsumer
> (DatastoreFieldManager.java:998)
> at org.datanucleus.store.appengine.DatastoreFieldManager.<init>
> (DatastoreFieldManager.java:133)
> at org.datanucleus.store.appengine.DatastoreFieldManager.<init>
> (DatastoreFieldManager.java:167)
> at
> org.datanucleus.store.appengine.DatastorePersistenceHandler.insertPreProcess
> (DatastorePersistenceHandler.java:316)
> at
> org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObjects
> (DatastorePersistenceHandler.java:236)
> at
> org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObject
> (DatastorePersistenceHandler.java:225)
> at org.datanucleus.state.JDOStateManagerImpl.internalMakePersistent
> (JDOStateManagerImpl.java:3185)
> at org.datanucleus.state.JDOStateManagerImpl.makePersistent
> (JDOStateManagerImpl.java:3161)
> at org.datanucleus.ObjectManagerImpl.persistObjectInternal
> (ObjectManagerImpl.java:1298)
> at org.datanucleus.ObjectManagerImpl.persistObject
> (ObjectManagerImpl.java:1175)
> at org.datanucleus.jdo.JDOPersistenceManager.jdoMakePersistent
> (JDOPersistenceManager.java:669)
> at org.datanucleus.jdo.JDOPersistenceManager.makePersistent
> (JDOPersistenceManager.java:694)
> at org.testgae.ParentTest.main(ParentTest.java:38)
>
> Am I doing something wrong or there is some other way to have parent-
> child relationship that provides some mechanism include paren'ts
> attributes in query criteria?
>
> Thanks
>
> Eugene
>
>
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