View file File name : class-wc-order-item-coupon-data-store.php Content :<?php /** * Class WC_Order_Item_Coupon_Data_Store file. * * @package WooCommerce\DataStores */ if ( ! defined( 'ABSPATH' ) ) { exit; } /** * WC Order Item Coupon Data Store * * @version 3.0.0 */ class WC_Order_Item_Coupon_Data_Store extends Abstract_WC_Order_Item_Type_Data_Store implements WC_Object_Data_Store_Interface, WC_Order_Item_Type_Data_Store_Interface { /** * Data stored in meta keys. * * @since 3.0.0 * @var array */ protected $internal_meta_keys = array( 'discount_amount', 'discount_amount_tax' ); /** * Read/populate data properties specific to this order item. * * @since 3.0.0 * @param WC_Order_Item_Coupon $item Coupon order item. */ public function read( &$item ) { parent::read( $item ); $id = $item->get_id(); $item->set_props( array( 'discount' => get_metadata( 'order_item', $id, 'discount_amount', true ), 'discount_tax' => get_metadata( 'order_item', $id, 'discount_amount_tax', true ), ) ); $item->set_object_read( true ); } /** * Saves an item's data to the database / item meta. * Ran after both create and update, so $item->get_id() will be set. * * @since 3.0.0 * @param WC_Order_Item_Coupon $item Coupon order item. */ public function save_item_data( &$item ) { $id = $item->get_id(); $save_values = array( 'discount_amount' => $item->get_discount( 'edit' ), 'discount_amount_tax' => $item->get_discount_tax( 'edit' ), ); foreach ( $save_values as $key => $value ) { update_metadata( 'order_item', $id, $key, $value ); } } }