将优惠券添加到预先存在的WooCommerce订阅中

Question

我已经启动了一个推荐计划，该计划为用户提供了 25 英镑的折扣优惠券代码，效果很好，但不适用于预先存在的订阅者，我如何挂钩续订并应用自动优惠券，以便订阅也可以从折扣中受益。？

我可以用woocommerce_new_order实现这一目标吗？

编辑：

更新帖子以帮助他人 我最终使用的代码来利用现有订阅者使用下面的优惠券：

// discount subscription renewals
function discount_subscription_renewals($billing_email){
$query_args = array(
'posts_per_page' => -1,
'post_type'      => 'shop_coupon',
'post_status'    => 'publish',
'orderby'        => array( 'title' => 'ASC' ),
'meta_query'     => array(
array(
'key'     => 'discount_type',
'value'   => 'fixed_cart',
),
),
);
$coupons = get_posts( $query_args );
$coupon_code = false;
$discount   = 0;
foreach ( $coupons as $coupon ) {
$customer_email = array($coupon->customer_email[0]);
$amount       =  $coupon->coupon_amount;
$usage_count  =  $coupon->usage_count;
$usage_limit   =  $coupon->usage_limit;

if (in_array($billing_email,$customer_email) && ($usage_count < $usage_limit)){
$coupon_code = $coupon->post_title;
break;
//$discount   += $amount;
}  
}   
return $coupon_code;
}

function apply_discount_on_renewal_order_created( $renewal_order, $subscription ) {
$order           = new WC_Order($renewal_order->get_id() );
$billing_email   = $order->get_billing_email();
$coupon_code   = discount_subscription_renewals($billing_email);
if ($coupon_code){
$order->apply_coupon($coupon_code);
//$order->set_total( $order->get_total() - $coupon_amount );
}    
return $order;
}
add_filter( 'wcs_renewal_order_created', 'apply_discount_on_renewal_order_created', 10, 2 );

Answer 1

function apply_discount_on_renewal_order_created( $renewal_order, $subscription ) {
$order           = new WC_Order( $renewal_order->get_id() );
$coupon_amount   = 25;
$order->set_total( $order->get_total() - $coupon_amount );
return $order;
}
add_filter( 'wcs_renewal_order_created', 'apply_discount_on_renewal_order_created', 10, 2 );