public function getProfile(){

        if (!$this->isGuest && $this->_profile === null){
                   $criteria = Array(
                    'condition'=>'user_id = :user_id',
                    'params'    =>  Array(
                            ':user_id'=>$this->model->id
                            )
                    );


                $this->_profile = Profile::model()->find(new CDbCriteria( $criteria ));

        }
        return $this->_profile;
    }