SQL + Ion Auth + CodeIgniter？

Question

我有以下SQL：

SELECT (
(SELECT SUM(vote_score) 
FROM question_votes 
JOIN questions 
ON vote_question = q_id 
JOIN users 
ON q_author = users.id 
WHERE q_author` = users.id) 
+ 
(SELECT SUM(vote_score) 
FROM answer_votes 
JOIN answers 
ON vote_answer = a_id 
JOIN users 
ON a_author = users.id 
WHERE a_author = users.id)) AS rep 

，我希望它在这里添加（离子验证的方法）：

$this->db->select(
      array(
       $this->tables['users'].'.*', 
       $this->tables['groups'].'.name AS '. $this->db->protect_identifiers('group'), 
       $this->tables['groups'].'.description AS '. $this->db->protect_identifiers('group_description'), 
       "(SELECT COUNT(`a_author`) FROM `answers` WHERE a_author = users.id) + (SELECT COUNT(`q_author`) FROM `questions` WHERE q_author = users.id) AS total_posts", 
       "SELECT 
((SELECT SUM(vote_score) 
FROM question_votes 
JOIN questions 
ON vote_question = q_id 
JOIN users 
ON q_author = users.id 
WHERE q_author` = users.id) 
+ 
(SELECT SUM(vote_score) 
FROM answer_votes 
JOIN answers 
ON vote_answer = a_id 
JOIN users 
ON a_author = users.id 
WHERE a_author = users.id)) AS rep" 
      ) 
     ); 

，但我得到的跟随着错误：

Answer 1

难道你阅读错误信息？

你有一个（`）哪里不应该有。

改变这样的：WHERE q_author” =这个users.id：WHERE q_author = users.id