Hi Michael.
I don´t know about your problem with the dvd store but i would like to give you a tip.
The Lazy loading works only with managed entities. That means that you have to get the entity with the entity manager and use it.
If you have a reference that is persisted but is not attached to a entity manager you have to merge it.
For example.
If you have a Many to many relationship between an entity named Person and a entity named Project.
@Entity
@Name("person")
public class Person implements Serializable {
//id and code
//...
@ManyToMany
private List<Project> projects;
//getters and setters
}
And have an action method that use a person object
public void doSopmething(){
//this.person is a valid reference to a person object in the session for example
// you have to merge it so the entity manager can lazy load the projects.
Person newReferenceToPerson = entityManager.merge(this.person);
//now, use the new object that is sincronized with the database.
// You could rereferenciate the person too.
List<Project> projects =
newReferenceToPerson.getProjects();
//It lazy loads all projects asociated to this person.
}
I hope this helps.