Symfony, Doctrin and createNativeQuery-CodePudding

I started playing with Symfony and I'm trying to create a database query. As i understand it, I should use entitymanager to create a nativequery. When I do the code below, I get this warning.

Warning: Undefined variable $entityManager

I understand that it's logical since the variable isn't initialized anywhere, but where do I get the entitymanager from?

Here is my class:


    namespace App\Repository;
use App\Entity\News;
use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
use Doctrine\Persistence\ManagerRegistry;
use Doctrine\ORM\Query\ResultSetMapping;

class NewsRepository extends ServiceEntityRepository
{
    public function __construct(ManagerRegistry $registry)
    {
        parent::__construct($registry, News::class);
    }

public function getById($id)
{
    $rsm = new ResultSetMapping();
        
    $query = $entityManager->createNativeQuery('SELECT * FROM `news` WHERE `id`=? LIMIT 1', $rsm);
    $query->setParameter(1, $id);
    
    $users = $query->getResult();
}
}

CodePudding user response：

You are in an entity repository, _em should be public.

You could either do:

public function getById($id)
{
    $rsm = new ResultSetMapping();
        
    $query = $this->_em->createNativeQuery('SELECT * FROM `news` WHERE `id`=? LIMIT 1', $rsm);
    $query->setParameter(1, $id);
    
    $users = $query->getResult();
}

or use autowiring to get the entity manager.

use Doctrine\ORM\EntityManagerInterface;
public function __construct(EntityManagerInterface $em, ManagerRegistry $registry)
    {
        $this->em = $em;
        parent::__construct($registry, News::class);
    }