升级到 CodeIgniter 3 后，“您的 SQL 语法有错误”

将网站更新到 CodeIgniter 3 后，出现此错误

我的代码：

  public function get_pickedItems(){
    $this->db->select('p.user_id,u.user_name,u.email,u.full_name,u.thumbnail,u.address,u.phone_no,u.postal_code,u.state,u.country,u.city');
    $this->db->from(USER_PAYMENT.' as p');
    $this->db->join(USERS.' as u' , 'p.user_id = u.id');
    $this->db->join(PRODUCT.' as pd' , 'pd.id = p.product_id'); 
    $this->db->where('p.user_id > 1 GROUP BY p.user_id');
    $this->db->order_by('p.id','ASC');
    return $this->db->get();
  }

错误

A Database Error Occurred
Error Number: 1064
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '`p`.`user_id` ORDER BY `p`.`id` ASC' at line 5
SELECT `p`.`user_id`, `u`.`user_name`, `u`.`email`, `u`.`full_name`, `u`.`thumbnail`, `u`.`address`, `u`.`phone_no`, `u`.`postal_code`, `u`.`state`, `u`.`country`, `u`.`city` FROM `shopsy_user_payment` as `p` JOIN `shopsy_users` as `u` ON `p`.`user_id` = `u`.`id` JOIN `shopsy_product` as `pd` ON `pd`.`id` = `p`.`product_id` WHERE `p`.`user_id` > `1 GROUP BY` `p`.`user_id` ORDER BY `p`.`id` ASC
Filename: models/User_model.php
Line Number: 462

我唯一更改的与数据库相关的是配置/数据库.php文件。

由于 3.0.0 将活动记录重命名为查询生成器，因此在您的 配置/数据库.php，您将需要重命名 $active_记录 变量为 $query_生成器

$active_group = 'default';
// $active_record = TRUE;
$query_builder = TRUE;