Quantities in packing slip not right after refund

Hi! I agree, packing slips do not fall under this rule, but since refund support comes as a package, I have not included this in the free version. In the Professional extension, this is a simple setting.

You can achieve the same thing in the free version with a filter:

add_filter( 'wpo_wcpdf_order_items_data', 'wpo_wcpdf_subtract_refunded_qty', 10, 2 );
function wpo_wcpdf_subtract_refunded_qty ( $items_data, $order ) {
    global $wpo_wcpdf;
    if ( $wpo_wcpdf->export->template_type == 'packing-slip' ) {

        foreach ($items_data as $key => &$item) {
            // item_id is required! (introduced in 1.5.3 of main plugin)
            if ( isset( $item['item_id'] ) ) {
                $refunded_qty = $order->get_qty_refunded_for_item( $item['item_id'] );
                $item['quantity'] = $item['quantity'] - $refunded_qty;
            }

            if ( $item['quantity'] == 0 ) {
                //remove 0 qty items
                unset( $items_data[$key] );
            }
        }
    }
    return $items_data;
}

Hope that helps!
Ewout

Wow. That is incredible responsiveness. Thank you!

Just as an FYI, since your solution you posted above about a year ago, it looks like perhaps Woocommerce is changing the way it stores the integer for refunded quantities.

I began noticing that, for example, if a customer bought 2 items and returned 1, the total quantity being shown on PDF invoices and packing slips using the filter above was 3, not 1, as expected.

If I change the line above to (changing sign of operand):
$item['quantity'] = $item['quantity'] + $refunded_qty;
then the math is correct.

So maybe previously WC stored a refunded qty as +1 and now it’s stored as -1. Not sure.

That’s entirely correct. This was changed in WooCommerce 2.6. Let’s hope it will stay like this from now on ??