Hi,
I can't have my child-object have an order. The following code fails
with:
javax.jdo.JDOFatalUserException: Detected attempt to establish
Topic(2) as the parent of SubTopic(9) but the entity identified by
SubTopic(9) has already been persisted without a parent. A parent
cannot be established or changed once an object has been persisted.
@PersistenceCapable(identityType = IdentityType.APPLICATION,
detachable = "true")
public class Topic {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
@Order(extensions = @Extension(vendorName="datanucleus", key="list-
ordering", value="position asc"))
@Persistent(defaultFetchGroup = "true", mappedBy = "topic")
@Element(dependent = "true")
private List<SubTopic> subTopics = new ArrayList<SubTopic>();
If I leave out the @Order everything works as expected. I do need the
ordering however. Is there some other way to achive the same?
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