Sample MVC

public function actionAdmin()
    {
        $model=new Customer('search');
        $model->unsetAttributes();  // clear any default values

        //this should display customers that are accessible
        $viewConfig;

        $viewConfig['showOwner'] = true;

        if(!Yii::app()->user->checkAccess('Admin'))
        {
            //if it is not an admin
            $model->owner_id = Yii::app()->user->id; //display results that he only owns
            $viewConfig['showOwner'] = false;

        }

         // for filtering only owned records
        if(isset($_GET['Customer']))
            $model->attributes=$_GET['Customer'];

        $this->render('admin',array(
            'model'=>$model,
            'viewConfig'=>$viewConfig,
        ));
    }