Excluding certain categories

Hi! There’s a small error in that code that would skip checking the first product. Also note that the category names are case sensitive, so double check that your ‘deposit’ and ‘event’ categories are all lowercase like you wrote in the code:

add_filter( 'wpo_wcpdf_custom_attachment_condition', 'wpo_wcpdf_exclude_product_categories', 100, 4 );
function wpo_wcpdf_exclude_product_categories( $condition, $order, $status, $template_type ) {
    // only apply check on invoices
    if ($template_type != 'invoice') {
        return $condition;
    }

    // define categories which shouldn't get an invoice here
    $no_invoice_cats = array('deposit','event');

    $items = $order->get_items();
    $order_cats = array();
    foreach ($items as $item_id => $item) {
        // get categories for item, requires product
        $product = $order->get_product_from_item( $item );
        if ($product) {
            $terms = get_the_terms( $product->id, 'product_cat' );
            if (empty($terms)) {
                continue;
            }
            foreach ($terms as $key => $term) {
                $order_cats[$term->term_id] = $term->name;
            }
        }
    }

    // get array of category matches
    $cat_matches = array_intersect($no_invoice_cats, $order_cats);
    if ( count($cat_matches) > 0 ) {
        // 1 or more matches, don't attach invoice
        return false;
    } else {
        return $condition;
    }
}

Let me know if that works for you!
Ewout

p.s. there’s a ‘code’ button in the forum post editor, if you wrap your code in those backticks ( `), that will make the code more readable.

Fantastic, very glad to hear that!

Have a great week!
Ewout

Hello Francisco,
That’s indeed how this should work, although there may be just one step missing in your flow: This filter does not enable the attachment, it only overrides the attachment setting you have already put into place in the plugin settings.

That said, if this is only to check for virtual products, then doing this with the category filter is unnecessarily complex. Can you try this?

add_filter( 'wpo_wcpdf_custom_attachment_condition', 'wpo_wcpdf_exclude_virtual_products', 100, 4 );
function wpo_wcpdf_exclude_virtual_products( $condition, $order, $status, $template_type ) {
    // only apply check on invoices
    if ($template_type != 'invoice') {
        return $condition;
    }

    $items = $order->get_items();
    foreach ( $items as $item_id => $item ) {
        // check if product is virtual, requires product object
        if ( $product = $order->get_product_from_item( $item ) ) {
            if ( $product->is_virtual() ) {
                // virtual product, do not attach invoice
                return false;
            }
        }
    }

    // no virtual products found, don't override setting
    return $condition;
}

Let me know if that does the trick for you!
Ewout

very glad to hear that Francisco, and thanks for the compliment 🙂
If you can spare a minute, I’d appreciate a plugin review: https://wordpress.org/support/plugin/woocommerce-pdf-invoices-packing-slips/reviews/

have a great day!
Ewout