I have the following class:

public class Parent
{
protected long id;
protected String name;
protected List childs1;
protected List childs2;

...
}

I save an object with a specific name:

parent1 = new Parent ();
parent1.setName ("X");
parent1.setChilds1 (...);
parent1.setChilds2 (...);
session.save (parent1);

If I get another object with the same name I want to update the last object with all it's relationships.

parent2 = new Parent ();
parent2.setName ("X");
parent2.setChilds1 (...);
parent2.setChilds2 (...);
session.save (parent2);

How can I do this?

If I understand well, you'll have to request the DB to retrieve all objects having the same name and do the job you want.

mean find ("from MyObject obj where obj.name= :name", ...);

Hi, Thanks for the quick reply emmanuel

The thing is that my data access objects will receive a new instatiated object, not a session loaded object and I have to update the database with this object. I know that there is a saveOrUpdateCopy method but I'm not sure if I can use this for what I need.

I do the same thing with my DAO layer. I get the initial object and pass it off to struts to display to forms. Once the user updates the object on screen, the changes are put together to construct a new instance of the object. I pass the new instance into the DAO and use saveOrUpdate() to do an update based on the primary key value. This is controlled by the following attribute in the mapping.



Note, if the primaryKey is 0 instead of null, it will try to do an insert instead of an update.

Hope that helps.

Hi gpani thanks for the reply

That works for the parent object but if you have child objects and you have cascade="all-delete-orphan" it won