cakephp 2.8 call other model from model

Answer.php(Model)

$VExamsQuestion = ClassRegistry::init('VexamsQuestion');

$question_points = $VExamsQuestion->find('all', array(  

                

      'conditions' => array(

 

                       "question_id" => $v['question_id'],

                "exam_id" => $postData['Exam'][0]

            ),

 

                   'fields' => array('VexamsQuestion.point')

                ));

OR

$VExamsQuestion = ClassRegistry::init('VexamsQuestion');

$question_points=$VExamsQuestion->get_list();

VExamsQuestion.php (other model)

--------------------------

--------------------------

function get_list(){

}