Hi Max,
I updated my code to use getters & setters and set both children and
parent relationships. The tests still fail as before:
public class RelationshipTest extends LocalServiceTestCase {
@Test // PASSES
public void saveParentWithChildAdded() throws Throwable {
Child child = new Child();
Parent parent = new Parent();
parent.addChild(child);
savePojo(parent);
assertNotNull(child.key);
assertNotNull(parent.key);
}
@Test // FAILS
public void saveParentThenAddChild() throws Throwable {
Child child = new Child();
Parent parent = new Parent();
savePojo(parent);
assertNotNull(parent.key);
parent.addChild(child);
child.setParent(parent);
savePojo(parent);
assertNotNull(parent.key);
assertNotNull(child.key); // THIS FAILS
}
@Test // FAILS
public void saveChildWithParentSet() throws Exception {
Child child = new Child();
Parent parent = new Parent();
savePojo(parent);
child.setParent(parent);
parent.addChild(child);
savePojo(child); // Shouldn't this work??
assertNotNull(parent.key);
assertNotNull(child.key); // THIS FAILS
}
@Test // FAILS, obviously
public void saveParentWithParentSet() throws Exception {
Child child = new Child();
Parent parent = new Parent();
savePojo(parent);
child.setParent(parent);
parent.addChild(child);
savePojo(parent);
assertNotNull(parent.key);
assertNotNull(child.key); // THIS FAILS
}
private void savePojo(Object pojo) throws Exception {
PersistenceManager pm = PMF.get().getPersistenceManager();
pm.setDetachAllOnCommit(true);
pm.setCopyOnAttach(false);
try {
pm.makePersistent(pojo);
pm.close();
} catch (Exception e) {
pm.close();
throw e;
}
}
@PersistenceCapable(identityType = IdentityType.APPLICATION,
detachable="true")
public static class Parent {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
Key key;
@Persistent(mappedBy = "parent")
private List<Child> children;
public Parent() {
children = Lists.newArrayList();
}
public List<Child> getChildren() {
return children;
}
public void addChild(Child child) {
children.add(child);
}
}
@PersistenceCapable(identityType = IdentityType.APPLICATION,
detachable="true")
public static class Child {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
Key key;
@Persistent
private Parent parent;
public Parent getParent() {
return parent;
}
public void setParent(Parent parent) {
this.parent = parent;
}
}
}
Any ideas?
Dobromir
On Aug 14, 8:11 pm, Max Ross <[email protected]> wrote:
> You may find this page
> helpful:http://www.datanucleus.org/products/accessplatform_1_1/jdo/orm/one_to...
>
> The key point is that you need to set both sides of a bidirectional
> relationship. Also, if you're accessing members directly (as in the below
> example) you need to annotate the class performing this access with
> @PersistenceAware. Otherwise JDO can't see that you're modifying the fields
> and doesn't know it needs to perform any updates. However, it's much easier
> to just always access members via setters and getters.
>
> Hope this helps,
> Max
>
>
>
> On Fri, Aug 14, 2009 at 4:31 PM, Dobromir <[email protected]> wrote:
>
> > Here's another test that fails and which gets to the heart of my
> > problem: how do I add a Child to a Parent that's already been saved?
>
> > �...@test // FAILS - help!
> > public void saveParentThenAddChild() throws Throwable {
> > Child child = new Child();
> > Parent parent = new Parent();
> > savePojo(parent);
> > assertNotNull(parent.key);
> > parent.children = Lists.newArrayList(child);
> > savePojo(parent);
> > assertNotNull(parent.key);
> > assertNotNull(child.key); // THIS FAILS
> > }
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