Как удалить сущность в отношении OneToMany.
@Entity
@NamedQueries({
@NamedQuery(name="User.findByUserNamePassword",
query="select c from User c where c.userName = :userName AND c.password = :password")
})
@Table(name="\"USER\"")
public class User implements Serializable {
@OneToMany(mappedBy="user", cascade=CascadeType.ALL, orphanRemove=true)
private List<Profession> professions;
public List<Profession> getProfessions() {
return professions;
}
public void setProfessions(List<Profession> professions) {
this.professions = professions;
}
public void addProfession(Profession profession){
if(this.professions == null){
this.professions = new ArrayList<Profession>();
}
this.professions.add(profession);
profession.setUser(this);
}
public void removeProfession(Profession profession){
if(this.professions != null){
professions.remove(profession);
profession.setUser(null);
}
}
}
Inside Profession Entity
@Entity
public class Profession implements Serializable {
@ManyToOne
@JoinColumn(name="UserId", nullable=false)
private User user;
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
Тогда внутри моего EJB у меня есть
@Stateless
@LocalBean
@TransactionAttribute(TransactionAttributeType.REQUIRED)
public class ScholarEJB{
/**
* Add a profession to a target user
* @param user
* @param profession
*/
public void addProfession(User user, Profession profession){
//Put the user in a managed state. It is important to do this before
//adding a new profession onto user
user = find(User.class, user.getId());
user.addProfession(profession);
this.create(user); //This is persist action
}
public void removeProfession(User user, Profession profession){
//Put the user in a managed state. It is important to do this before
//adding a new profession onto user
user = find(User.class, user.getId());
user.remove(user);
this.update(user); //merge action
//this.create(user) //also try this as well, but it does not work
}
}
Теперь addProfession прекрасно работает, но removeProfession не работает. Не уверен почему? Помогите, пожалуйста. Нужно ли изгонять кеш?