Woocommerce函数set_total_sales()未设置并将total_sales保存到数据库 _set_total_sales

我正在处理woocommerce中的儿童主题。在一个函数中, 我尝试使用默认的get_total_sales()和set_total_sales()来增加总销售额并保存从AJAX调用时(单击按钮下载时)的销售额。

function download_count_callback(){//get product id from AJAX POST $productid = $_POST['productid']; //get product by id $product = wc_get_product( $productid ); //get the total sales number $downloadcount = $product-> get_total_sales(); error_log ("NUMBER was : ".$downloadcount ); //add 1 to total sales $downloadcount += 1; error_log ("NUMBER should become : ".$downloadcount ); //get the renewed total sales number $product-> set_total_sales($downloadcount); error_log ("NUMBER NOW : ".$product-> get_total_sales()); wp_die(); }

服务器日志如下所示：

[23-Feb-2020 12:44:44 UTC] NUMBER was : 0 [23-Feb-2020 12:44:44 UTC] NUMBER should become : 1 [23-Feb-2020 12:44:44 UTC] NUMBER NOW : 1

看起来不错, 但没有… 下载计数未保存到数据库中。当我刷新页面时,
get_total_sales()将返回到0。
这有什么问题吗？
#1【Woocommerce函数set_total_sales()未设置并将total_sales保存到数据库】这有什么不同吗？

function download_count_callback(){//get product id from AJAX POST $productid = $_POST['productid']; //get product by id $product = wc_get_product( $productid ); //get the total sales number $downloadcount = $product-> get_total_sales(); error_log ("NUMBER was : ".$downloadcount ); //add 1 to total sales $downloadcount += 1; error_log ("NUMBER should become : ".$downloadcount ); //get the renewed total sales number $product-> set_total_sales($downloadcount); $product-> save(); error_log ("NUMBER NOW : ".$product-> get_total_sales()); wp_die(); }