包含列以搜索查询

Question

我正尝试在Wordpress搜索查询中添加额外的列。

表名：wp_lookup列：总计

Standard Wordpress仅在博客内容中搜索博客标题。

add_filter( 'posts_where' , 'posts_where' );

function posts_where( $where ) {
    global $wpdb;
        $author = "tj";
        $where .= " AND ID IN (SELECT object_id FROM {$wpdb->lookup} WHERE total=$author )";
return $where;
}