Initialize new children with FK values

Antonio Sandoval posted on Monday, February 16, 2009

I had writen a code generator, this generator add StringRequiered validation Rules for each Field that is not nullable. So I have a Root Parent and a Child list, when I add a new child its never come valid because the foreign key value is initialized in the update method. I write the foreign keys initializer in the ListChanged delegate, but I'm not sure if it will kill perfomance in bigger lists, or if there is a better way.

class RootParent : Bussinesbase{
private ChildList _ChildList =ChildList.NewChildList();

_ChildList_ListChanged(sender, e){
       if(e.ListChangedType == ItemAdded){
            foreach(Child c in _ChildList){
                if(c.IsNew)
                    c.ForeignKey = _Primarykey;   <-Initialize all of the foreign keys
            }
      }
  }

   DataPortal_Update(){
        DoInsertUpdate();
        _ChildList.Update(this);
   }
}

class ChildList : BussinesListBase {
        addValidationRules(){
                AddStringRequiered("ForeignKey");
        }
        internal Update(RootParent parent){
               foreach(Child c in this){
                  c.ForeignKey = parent.PrimaryKey;
                  if(c.IsNew)
                          c.Insert();
                   else
                         c.Update();
            }
        }
}