PHP yii实现model添加默认值的方法(两种方法)

public function rules(){ // NOTE: you should only define rules for those attributes that // will receive user inputs. return array(  array('start, end', 'required'),  array('user_id', 'numerical', 'integerOnly'=>true),  array('timestamp','default','value'=>date('Y-m-d H:i:s')),  // The following rule is used by search().  // Please remove those attributes that should not be searched.  array('id, start, end, user_id, timestamp', 'safe', 'on'=>'search'), );}

function beforeSave(){ $this->user_id = Yii::app()->user->id; return true;}