orderitems => { parts_id => 'part', trans_id => 'order', },
delivery_order_items => { parts_id => 'part' },
invoice => { parts_id => 'part' },
orderitems => { parts_id => 'part', trans_id => 'order', },
delivery_order_items => { parts_id => 'part' },
invoice => { parts_id => 'part' },