Problem with oneToMany relations...

wellmattos · **Joined:** Thu May 11, 2006 6:25 pm **Posts:** 2

Hibernate version: 3.1

Hi people,

I´m having a problem with oneToMany associations... For example, The entity A have a list of entity B, when i insert a new element of B and update A everything goes clear... when i update a element of the list B and update A everything goes clear... but when i delete a element of the list B and update A.. nothing happens.. the hibernate just update the other elements but don´t delete the others... here a example of the mapping..

Code:

Class A { 
    Set<B> bs;
    @OneToMany(fetch = FetchType.EAGER,cascade = CascadeType.ALL,    mappedBy ="a" )
    public Set getB();
 }
 
 Class B {
     A a;
     @ManyToOne
     @JoinColumn(name = "OID_A") 
     public A getA();
 
 }

Please... help me... I tried to manipulate the PersistentSet directly.. but when i do this a exception is throw "Found two representations of the collection". I Tried ALL_DELETE_ORPHAN.. I Tried everything....

calin · **Joined:** Wed Nov 23, 2005 5:01 am **Posts:** 15

Hi ,

For bidirectional associations you have to specify "inverse=true" into the one side. For example if you have A that have a list of B and B has a many-to-one relation with A than you have to specifie into A mapping the following:
<set name="setOfB" cascade="all-delete-orphan" inverse="true">
.....
</set>

And you have also to specify all-delete-orphan if you want to delete an instance of B from the A set and in the same time the B instance to be deleted from database.

wellmattos · **Joined:** Thu May 11, 2006 6:25 pm **Posts:** 2

But how you do this with annotations??? I think with the property maped by i have this behavior...