将WooCommerce订单项目自定义字段总和保存为新的元数据

问题描述：

在此WooCommerce商店中订购特定产品时，两个元值将添加到该订单中.

When a particular product is ordered in this WooCommerce store, two meta values are added to the order.

存储元值的两个字段位于wp_woocommerce_order_itemmeta

The two fields that store the meta values are located in wp_woocommerce_order_itemmeta

元键是:

quantity
assemblycost

我想在下达新订单时以编程方式创建一个新的自定义字段，并且如果已订购的产品存在元密钥assemblycost，则将该新字段的值设置为等于quanity * assemblycost.

I want to create a new custom field programmatically when a new order is placed and set the value of this new field equal to quanity * assemblycost if the meta key assemblycost exists for the product that has been ordered.

经过一些研究，我发现woocommerce_checkout_update_order_meta是一个将订单保存到数据库并且元数据已更新后执行的钩子.因此，这似乎是我应该使用的钩子.

After some research I discovered that woocommerce_checkout_update_order_meta is a hook that is executed after an order is saved to the database and the meta data has been updated. So this appears to be the hook I should use.

参考: 为Woocommerce中的订单添加额外的元数据:

 function add_item_meta( $order_id ) {
            //global $woocommerce;
            update_post_meta( $order_id, '_has_event', 'yes' );
        }

我尝试在functions.php中添加以下代码:

I tried adding the following code, in functions.php:

 add_action('woocommerce_checkout_update_order_meta',function( $order_id, $posted ) {  
    $assemblycost = wc_get_order_item_meta($order_id, 'assemblycost');
    $quantity = wc_get_order_item_meta($order_id, 'quantity');
    $calculatedValue = $quantity * $assemblycost;
    wc_update_order_item_meta( $order_id, 'calculated_field', $calculatedValue );  
} , 10, 2);

这确实创建了新的meta字段，但是将其值设置为0.

This does create the new meta field, however it sets the value to 0.

如何更改上面的代码，以使calculated_field的值等于quantity * assemblycost的乘积?

How can I change the code above so that the value of calculated_field is the multiplication of quantity * assemblycost ?

答

这与订单商品有关，应保存为订单商品元数据，而不要保存为订单元数据.

This is related to order items and should be saved as order item meta data but not as order meta data.

现在应与两个自定义字段quantity和assemblycost一起保存.因此，您应该在问题中提供将quantity和assemblycost保存为订单项元数据的相关代码.

Now this should be saved at the same time than your 2 custom fields quantity and assemblycost. So you should provide in your question the related code that save quantity and assemblycost as order item meta data.

您可以尝试以下操作(但是我不确定我是否可以工作):

You can try the following (but I am not sure that I will work):

add_action( 'woocommerce_checkout_create_order_line_item', 'action_checkout_create_order_line_item_callback', 1000, 4 );
function action_checkout_create_order_line_item_callback( $item, $cart_item_key, $cart_item, $order ) {
    $quantity     = $item->get_meta('quantity');
    $assemblycost = $item->get_meta('assemblycost');
    if( isset($quantity) && isset($assemblycost) ) {
        $item->update_meta_data( 'calculated_field', $quantity * $assemblycost );
    }
}

代码进入您的活动子主题(或活动主题)的function.php文件中.

Code goes in function.php file of your active child theme (or active theme).

将WooCommerce订单项目自定义字段总和保存为新的元数据

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