Hi,
I'm fairly new to JDO and App Engine and actually facing an odd
problem.
I'm trying to retrieve a child object with the method
pm.getObjectById(Child.class, Id) but this method throws me a
JDOObjectNotFoundException. I'm sure that the child object exists and
in facts, when I retrieve the parent object with the same method
before calling it for the child object, everything works fine.
It seems like I'm missing something so here is my code :
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Parent{
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
@Persistent
private String title;
@Persistent(mappedBy="parent", defaultFetchGroup="true")
private List<Child> childs;
public Parent(String title, List<Child> childs) {
super();
this.title = title;
this.childs = childs;
this.configuration = configuration;
this.utilisateur = utilisateur;
this.commentaires = commentaires;
}
}
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Child{
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
@Persistent
private Parent parent;
@Persistent
private String title;
@Persistent
private String content;
public Bloc(String title, String content) {
super();
this.title = title;
this.content = content;
}
}
And my code for getting the object :
PersistenceManager pm = PMF.get().getPersistenceManager();
Transaction tx = pm.currentTransaction();
try{
tx.begin();
// If I add a line here : Parent parent =
pm.getObjectById(Parent.class, parentId); the code works.
Child child= pm.getObjectById(Child.class, childId); // childId is a
long
//Code making changes to child object but it doesn't get that
far...
tx.commit();
}
finally{
if(tx.isActive())
tx.rollback();
}
pm.close();
So here is my problem. Hope someone can help me ^^.
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