Update By Primary Key
Model::model()->updateByPk($Model->id,array("status"=>'ok'));    
Update All Rows
Model::model()->updateAll(array('user'=>"$userid",'date'=>$currenttime),"status=>'ok'");
 If you want to return to your previous url after login or logout try this :    <?php  $this -> redirect (Yii :: app () -> request -> urlReferrer ); ?>     To set the return url to be the url that was before the login page or registeration page was called you can put following code in views/layouts/main.php file :     <?php  //this checks id the controller action is not 'login' then it keeps the current url in returnUrl  if (CController :: getAction () -> id != 'login' ) {     Yii :: app () -> user -> setReturnUrl (Yii :: app () -> request -> getUrl ());  }  ?>