构建查询以搜索多个属性

I am very new to coding, especially with Symfony. But now my teacher has given me a task to create a query to search within 2 attributes. I have started writing the query, but there is still a lot lacking. I am wondering if someone can help, or send a link to help me finish it.

I need to make a search option which looks up into Artikelnummer and Omschrijving.

/**
* @Route("/artikel/zoek", name="zoekartikel")
*/
Public function zoek(Request $request){
   $em = $this->getDoctrine()->getManager();
   $query = $em->createQuery(
       'SELECT a
       FROM AppBundle:Artikel a
       WHERE a.artikelnummer = input AND a.omschrijving LIKE input2'
   );
   $artikelen = $query->getResult();
   return new Response($this->render('search.html.twig',
   array('artikelen' => $artikelen)));

}

You need first to instantiate Result Mapping

use Doctrine\ORM\Query\ResultSetMapping;

$rsm = new ResultSetMapping();

Then

$query = $em-> createNativeQuery(
       'SELECT a
       FROM AppBundle:Artikel a
       WHERE a.artikelnummer = ? AND a.omschrijving LIKE ?', 
       $rsm
   );

$query->setParameter(1, 'input1'); // or var
$query->setParameter(2, 'input2'); // or var
$artikelen = $query->getResult();
return new Response($this->render('search.html.twig',
   array('artikelen' => $artikelen)));

More docs here http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/native-sql.html