在Yii中返回CActiveDataProvider(return CActiveDataProvi

我有4个数据库表：

用户 ：ID，用户名，密码

楼层 ：ID，用户ID，姓名

客房 ：ID，楼层，名称

学生 ：ID，房间名称，活跃

如何返回CActiveDataProvider为后续SQL命令？

SELECT * FROM `student` WHERE `student`.`active` = 0 AND `student`.`room` IN (SELECT `room`.`id` FROM `room` WHERE `room`.`floor` = (SELECT `floor`.`id` FROM `floor` WHERE `floor`.`userid` = $userid))

我试过了：

$model = Student::model()->findAllBySql("SELECT * FROM student WHERE active = 0 AND room IN (SELECT id FROM room WHERE floor = (SELECT id FROM floor WHERE user = $user))");
return new CActiveDataProvider($model);

但响应：

致命错误：调用一个成员函数getDbCriteria（）一个非对象在X：的appserv \ WWW \框架\网络\上线225 CActiveDataProvider.php

Answer 1:

命名占位符是有用的。

$criteria = new CDbCriteria;
$criteria->condition = 'student.active = 0 AND student.room IN (SELECT room.id FROM room WHERE room.floor = (SELECT floor.id FROM floor WHERE floor.userid = :userid))';
$criteria->params=array(':userid'=>$userid);
$dataProvider = new CActiveDataProvider('Student',array('criteria'=>$criteria,));

文章来源: return CActiveDataProvider in Yii