Yii：查询构建器：按顺序表达

Question

在AC中，此顺序效果很好，但“查询”构建器的引号错误，结果错误

$models = Yii::app()->db->createCommand()
->select('id, user_id, title, created, modified, lang, forum_id, post_id, status, views, replies, attached')
->from('posts')
->where('post_id = 0')
->order('attached AND forum_id = 1 AND created DESC, created DESC')
->limit(11)
->queryAll();

错误：

  

CDbCommandнеудалосьисполнитьSQL-запрос：SQLSTATE [42S22]：未找到列：1054未知列'附加AND forum_id = 1并且'在'order子句'中创建'。执行的SQL语句是：SELECT id，user_id，title，created，modified，lang，forum_id，{ {1}}，post_id，status，views，replies   来自attached   WHERE post_id = 0   ORDER BY posts DESC，attached AND forum_id = 1 AND created DESC，replies DESC LIMIT 11

如何解决？

P.S。抱歉我的英文。

Answer 1

您的where和order应该是：

->where('post_id = 0')
->order('CASE WHEN forum_id =1 THEN 1 ELSE 2 END, created DESC')

参考：How do I return rows with a specific value first?

Answer 2

您应该在圆括号中使用顺序表达式以避免检查列。这必须工作

->order('(attached AND forum_id = 1 AND created) DESC, created DESC')