如何检查订单商品是否具有“回购”元字段？

Question

请告知如何检查新的Woocommerce订单中某些商品是否存在“延期交货”元字段。我正在尝试为新订单上的客户添加注释，但无法找出为什么我的功能不起作用：

function tt_backorder_warning_note ( $order_id ) { 

    $tt_order = new WC_Order( $order_id );
    $tt_items = $tt_order->get_items();
    $tt_backorder = FALSE;
    $tt_backordered_note = 'Some text to warn customer that they will wait longer';

    foreach ($tt_items as $tt_item) {
        if ($tt_item['Предзаказано']) { // Предзаказано = Backordered
            $tt_backorder = TRUE;
            break;
        }
    }

    if($tt_backorder) {
        $tt_order->add_order_note( $tt_backordered_note, $is_customer_note = 1 );
    }
}

add_action( 'woocommerce_new_order', 'tt_backorder_warning_note' );

Answer 1

您需要在产品上获取元数据：

function tt_backorder_warning_note ( $order_id ) { 

    $tt_order = new WC_Order( $order_id );
    $tt_items = $tt_order->get_items();
    $tt_backorder = FALSE;
    $tt_backordered_note = 'Some text to warn customer that they will wait longer';

    foreach ($tt_items as $tt_item) {

        if ($tt_item->is_on_backorder()) {
            $tt_backorder = TRUE;
            break;
        }
    }

    if($tt_backorder) {
        $tt_order->add_order_note( $tt_backordered_note);
    }
}

add_action( 'woocommerce_new_order', 'tt_backorder_warning_note' );