Set "Item has BOM"-indicator

Hi,

To indicate that a Part has BOM or not I want to set a field (HasBOM) to 1 or 0

I have below server side code  triggered on onBeforeAdd and  OnBeforeUpdate on the Part item type

It works,

But I have to press save twice!? to have the field updated after I removed or added a BOM,
is there a way to have it updated directly on save???

Thanks for any idea

//Mikael

// Method to check if item has BOM and set HasBOM "

Innovator inn = this.getInnovator();
string issueID = this.getProperty("source_id","");

Item updatedBOM = inn.applyAML( "<AML>" + " <Item type='Part BOM' action='get' select='related(item_number)'>" + " <source_id>" + this.getID() + "</source_id>" + " <related_id>" + " <Item>" + " </Item>" + " </related_id>" + " </Item>" + "</AML>");

if (updatedBOM.getItemCount() > 0)

{
this.setProperty("hasbom", "1");
}
else
{
this.setProperty("hasbom", "0");
}

return this;