why models cant uses DI which i inject in services

You should be able to call any service defined in DI from your model. For someone to help you, will need at least this information:

• code snippet
• phalcon version

follow is my services di code:

  $di->set('manager', function() {
  return new modelManager();
  });

follow is my Model Cars in namespace Model

public function test(){
    $phql="select * from Model\Cart";
    $rows = $this->manager->excuteQuery($phql);
}

at last Notice: Access to undefined property Models\Cars::manager in C:\wamp\www\front\app\models\Cars.php on line 29

what a f*&k thing, thanks a lot , i have find almost a day follow its session in model

class Robots extends Phalcon\Mvc\Model { public function beforeCreate() { $this->userId = $this->getDI()->getSession()->get('user-id'); } }