0 Replies Latest reply on Sep 4, 2006 11:47 AM by Alan Berezin

    deleting objects in a Collection based OneToMany mapping

    Alan Berezin Newbie

      I am using Jboss 4.0.4.ga and have a OneToMany like this

      @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "order")
      public Collection getLineItems() {
      return lineItems;
      }

      On the other side, I have this:
      @ManyToOne
      @JoinColumn(name = "order_id")
      public Order getOrder() {
      return order;
      }


      I persist an Order with one LineItem. I then clear the collection of LineItems and repersist (actually call em.merge(Object) ) the Order.
      Jboss doesnt appear to delete the underlying row in the LineItem table.

      I cant understand from the docs if the cascade = CascadeType.ALL implies that the contained objects should be deleted from the datastore when they are removed from a Collection. The docs seem to indicate this is not done for a ManyToMany bc it is not possible to know if the objects that are removed from a collection are still referenced by another entity. However, it does seem that in a OneToMany, JBOSS could know enough to delete the dependent entites from the datastore.

      Thanks for any help on this one.