Reply To: composite products count

[Soft79]

Great info. Then this snippet should work. Make sure to replace my_coupon_code. Please note that the snippet is untested.

add_filter(
    'woocommerce_coupon_is_valid_for_product', 
    function ( $valid, $product, $coupon, $values ) {
        if ( $coupon->get_code() === 'my_coupon_code' && array_key_exists( 'composite_parent', $values ) ) {
            $valid = false;
        }
        return $valid;
    }, 10, 4
);