在Yii中返回CActiveDataProvider [英] return CActiveDataProvider in Yii

问题描述

我有4个数据库表:

用户:ID，用户名，密码

User: id, username, password

楼层:ID，用户ID，名称

Floor: id, userid, name

房间:ID，楼层，名称

学生:身份证，房间，姓名，现役

Student: id, room, name, active

如何为以下SQL命令返回CActiveDataProvider?

How to return CActiveDataProvider for the follow SQL command?

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))

我尝试过:

$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);

但是回应:

致命错误:在第225行的X:appserv \ www \ framework \ web \ CActiveDataProvider.php中的非对象上调用成员函数getDbCriteria()

Fatal error: Call to a member function getDbCriteria() on a non-object in X:appserv\www\framework\web\CActiveDataProvider.php on line 225

推荐答案

命名占位符很有用.

$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,));

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