Removing an element from an @OneToMany doesn't work

#1
Vladiator
Vladiator's picture
Joined on 2013-10-20

Hello. I have a Parent and Child entities. 

// in the parent

@OneToMany(mappedBy = "parent", fetch = FetchType.EAGER, cascade = CascadeType.ALL)
private List<Child> children;

// in the child

@ManyToOne
private Parent parent;

Somewhere I do this: 

parent.getChildren().remove(0);
manager.merge(parent);

Manager.merge is just 

transaction.begin();
entityManager.merge(o);
transaction.commit();

But the element isn't removed. Should I remove the children entity too? It works using EntityManagerFactory.

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#2
support
support's picture
Joined on 2010-05-03

You should update both sides, i.e. set null in the child's parent field.

ObjectDB Support
ObjectDB - Fast Object Database for Java (JPA/JDO)
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