Question

Instead of getting into code, I have a simple question. Default behavior for a simple one-to-many is that it inserts the child record then updates the foreign key column with the parent key.

Has anyone ever had a one-to-many where the child object gets inserted but not updated resulting in a row in my table with a null in the foreign key column?

I want the default behaviour for a standard one-to-many. I don t want to have to add the parent as a property to the child.

Thanks.

Answer 1

This would happen if you didn t have cascade="save-update" on your set/bag

or if you set your session s FlushMode to None or Commit and saved the child using your childRepository and neglected to save the object containing the collection using its repository.

Answer 2

I think you have to set parent reference in child item.

class Parent {
  public virtual IList<Child> Children;
}

class Child {
  public virtual Parent Parent;
}

Parent p = new Parent();
Child c = new Child();
c.Parent = p;
p.Children = new List<Child>();
p.Children.Add(c);

Now when you save this transient object p you will have the right foreign key in the child table.

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