Woocommerce 保存 ACF 字段

Question

我正在使用 Woocommerce、Snippets 和 ACF 字段，我在产品中创建了元字段，我想在购物车项目中获取 ACF 字段，并将它们保存在订单表中但不起作用，我已经检查了大页面但我仍然没有找不到我需要的答案，你能帮帮我吗？提前致谢。

我试过了

add_action( 'woocommerce_get_cart_item_from_session',  'cart_item_from_session' , 99, 2 );

function cart_item_from_session( $item_id, $data ) {
    $calories = $item_id->get_meta('acf-calories');
    $delivery_date = $item_id->get_meta('acf-delivery_date');
}

add_filter( 'woocommerce_add_order_item_meta', 'add_item_meta_order', 10, 3 );

function add_item_meta_order( $item_id, $data ) {
        wc_add_order_item_meta( $item_id, 'acf-calories', "$calories", 'acf-delivery_date', "$delivery_date");
    }

// Display on product page
add_action( 'woocommerce_before_add_to_cart_button', 'display_acf_single_product_pages', 1 );
function display_acf_single_product_pages() {
    global $product;

    $calories = get_field( 'acf-calories',  $product->get_id() );
   
    $delivery_date = get_field( 'acf-delivery_date', $product->get_id() );
   
}

// Add as custom cart item data
add_filter( 'woocommerce_add_cart_item_data', 'save_acf_as_cart_item_data', 10, 2 );
function save_acf_as_cart_item_data( $cart_item_data, $cart_item ) {
    $calories = $item_id->get_meta('acf-calories');
    $delivery_date = $item_id->get_meta('acf-delivery_date');
       
        $cart_item_data['unique_key'] = md5( microtime().rand() );
}    
    return $cart_item_data;


// Display on cart and checkout
add_filter( 'woocommerce_get_item_data', 'display_acf_on_cart_and_checkout', 10, 2 );
function display_acf_on_cart_and_checkout( $cart_data, $cart_item ) {
    $calories = $item_id->get_meta('acf-calories');
    $delivery_date = $item_id->get_meta('acf-delivery_date');
    
    //I don't know if here I have to add some return?
}

// Display on orders and email notifications (save as custom order item meta data)
add_action( 'woocommerce_checkout_create_order_line_item', 'display_acf_on_orders_and_emails', 10, 4 );
function display_acf_on_orders_and_emails( $item, $cart_item_key, $values, $order ) {
    $calories = get_field( 'acf-calories', $values['product_id'] );
    $delivery_date = get_field( 'acf-delivery_date', $values['product_id'] );
    }


// Change displayed label for specific custom order item meta keys
add_filter('woocommerce_order_item_display_meta_key', 'filter_wc_order_item_display_meta_key', 10, 3 );
function filter_wc_order_item_display_meta_key( $display_key, $meta, $item ) {

    // Change displayed label for specific order item meta key
    if( is_admin() && $item->get_type() === 'line_item' ) {
        if( $meta->key === 'acf-calories' ) {
            $display_key = __("Calories", "woocommerce");
        }
        if( $meta->key === 'acf-delivery_date' ) {
            $display_key = __("Delivery Date", "woocommerce");
        }
    }
    return $display_key;
}