-package SL::DB::Manager::OrderItem;
-
-use SL::DB::Helper::Paginated;
-use SL::DB::Helper::Sorted;
-
-sub _sort_spec {
-  return ( columns => { delivery_date => [ 'deliverydate',        ],
-                        description   => [ 'lower(orderitems.description)',  ],
-                        partnumber    => [ 'part.partnumber',     ],
-                        qty           => [ 'qty'                  ],
-                        ordnumber     => [ 'order.ordnumber'      ],
-                        customer      => [ 'lower(customer.name)', ],
-                        position      => [ 'trans_id', 'runningnumber' ],
-                        transdate     => [ 'transdate', 'lower(order.reqdate::text)' ],
-                      },
-           default => [ 'position', 1 ],
-           nulls   => { }
-         );
+sub shipped_qty {
+  my ($self) = @_;
+
+  my $d_orders = $self->order->linked_records(direction => 'to', to => 'SL::DB::DeliveryOrder');
+  my @doi      = grep { $_->parts_id == $self->parts_id } map { $_->orderitems } @$d_orders;
+
+  require SL::AM;
+  return sum(map { AM->convert_unit($_->unit => $self->unit) * $_->qty } @doi);
+}
+
+sub delivered_qty {
+  my ($self) = @_;
+
+  return $self->_delivered_qty;