[hibernate-issues] [Hibernate-JIRA] Created: (HHH-6709) Orphan removal in @OneToMany does not work properly (JPA 2.0)
Orphan removal in @OneToMany does not work properly (JPA 2.0)
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Key: HHH-6709
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6709
Project: Hibernate Core
Issue Type: Bug
Affects Versions: 3.6.7
Environment: MySQL 5.1.54
Reporter: Damien
Attachments: Tests.zip
Consider following entities (getters, setters, equals and hashCode are omitted for
brevity):
{code:borderStyle=solid}
@Entity
public class Parent
{
@Id
@GeneratedValue
private int id;
@OneToMany(mappedBy="parent", orphanRemoval=true)
private List<Child> children = new LinkedList<Child>();
}
@Entity
public class Child
{
@Id
@GeneratedValue
private int id;
@ManyToOne
private Parent parent;
}
{code}
According to the specification of JPA 2.0 (section 11.1.36), removing a child entity from
the parent's children collection should lead to it being removed from the database.
However, following code leaves an orphaned child entity stored in the database:
{code:borderStyle=solid}
// assuming there is one parent entity in the db
// containing one child entity in its collection
entityManager.getTransaction().begin();
Parent parent = entityManager.find(Parent.class, parentId);
parent.getChildren().get(0).setParent(null);
parent.getChildren().clear();
entityManager.getTransaction().commit();
{code}
Removing a parent entity however works fine (no orphans remain in the database).
I have attached a JUnit test case illustrating the behavior. I ran the test against
another persistence provider, where the orphan was removed as expected.
I have also included the Hibernate-equivalent of the test (using Hibernate's native
API instead of JPA). This code also cleans up the orphan as expected. Thus the bug seems
to be related to the JPA implementation (EntityManager etc).
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