我在WooCommerce结账时添加自定义字段时遇到问题，我正在使用以下代码：

add_filter(\'woocommerce_checkout_fields\',\'custom_override_checkout_fields\');
function custom_override_checkout_fields($fields) {
    $fields[\'billing\'][\'billing_colonia\'] = array(
        \'label\' => __(\'Colonia\', \'woocommerce\'),
        \'placeholder\' => _x(\'\', \'placeholder\', \'woocommerce\'),
        \'required\' => true,
        \'class\' => array(\'form-row-wide\'), 
        \'clear\' => true
    );
    
    $fields[\'shipping\'][\'shipping_colonia\'] = array(
        \'label\' => __(\'Colonia\', \'woocommerce\'),
        \'placeholder\' => _x(\'\', \'placeholder\', \'woocommerce\'),
        \'required\' => true,
        \'class\' => array(\'form-row-wide\'), 
        \'clear\' => true
    );
    return $fields;
}

它确实在结帐表单上显示了该字段，但我填写了该字段并完成了一个订单，关于此新字段的任何内容都不会保存在/wp admin/edit的任何订单上。php？post\\u类型=车间订单

我应该做些什么来保存这些信息吗？在此处添加自定义字段的正确方法是什么？

add_action( \'woocommerce_checkout_update_order_meta\', \'custom_checkout_fields_update_order_meta\' );
function custom_checkout_fields_update_order_meta( $order_id ) {
    update_post_meta( $order_id, \'billing_colonia\', sanitize_text_field( $_POST[\'billing_colonia\'] ) );
    update_post_meta( $order_id, \'shipping_colonia\', sanitize_text_field( $_POST[\'shipping_colonia\'] ) );
}