停止转义列名codeigniter活动记录

Question

我有以下的activerecord代码来获取发票及其付款总额。

$this->db->select('invoice.*,customer.custid,customer.cust_name,customer.cperson,customer.cust_email,customer.cust_mobile,customer.cust_address,sum(payment_received.amount) as paid_amount');
            $this->db->join('customer','customer.custid=invoice.custid');
            $this->db->join('payment_received','invoice.inid=payment_received.inid','left');
    $this->db->where('@paid_amount IS NULL');

由于codeigniter转义列名称带有＆＃39;`＆＃39;这个字母显示错误＆＃34;未知列＆＃39; @ paid_amount＆＃39;在＆＃39; where子句＆＃39;＆＃34;

如何停止转义列名？

Answer 1

你看过用户指南了吗？ get和where方法都接受一个参数来阻止CI转义数据。

https://ellislab.com/codeIgniter/user-guide/database/active_record.html