YII中自定义查询条件

1.

class Post extends CActiveRecord{    ......    public function scopes()    {        return array(            'published'=>array(                'condition'=>'status=1',            ),            'recently'=>array(                'order'=>'create_time DESC',                'limit'=>5,            ),        );    }}

2.

$posts=Post::model()->published()->recently()->findAll();

3.

public function recently($limit=5){    $this->getDbCriteria()->mergeWith(array(        'order'=>'create_time DESC',        'limit'=>$limit,    ));    return $this;}

4.

$posts=Post::model()->published()->recently(3)->findAll();