将以下代码添加到functions.php 主题目录中的文件。

add_action(\'init\', \'set_point_earned\');

function set_point_earned() {
    global $wpdb;

    $wpdb->query("INSERT INTO {$wpdb->postmeta} (post_id, meta_key, meta_value)
    SELECT ID, \'_ywpar_point_earned\', \'5\' FROM {$wpdb->posts} WHERE post_type IN (\'product\',\'product_variation\') AND NOT EXISTS ( SELECT * FROM {$wpdb->postmeta} WHERE post_id = ID AND meta_key = \'_ywpar_point_earned\' )");
}