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How do you create and use custom Doctrine query methods?

How do you create and use custom Doctrine query methods?

Creating and using custom Doctrine query methods involves extending the default functionality provided by Doctrine’s Entity Repository. Here’s a concise guide on how to do this:

Step 1: Create a Custom Repository Class

  1. Create the Repository Class: Extend the EntityRepository class for your entity.

Example

<?php
// src/Repository/YourEntityRepository.php
namespace App\Repository;

use App\Entity\YourEntity;
use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
use Doctrine\Persistence\ManagerRegistry;

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

    // Step 2: Define Custom Query Method
    public function findByCustomCriteria($criteria)
    {
        return $this->createQueryBuilder('e')
            ->where('e.someField = :criteria')
            ->setParameter('criteria', $criteria)
            ->getQuery()
            ->getResult();
    }
}
?>

Step 2: Register the Custom Repository

  1. Update the Entity Annotation: Specify the custom repository class in your entity.

Example

<?php 
// src/Entity/YourEntity.php
namespace App\Entity;

use Doctrine\ORM\Mapping as ORM;
use App\Repository\YourEntityRepository;

/**
 * @ORM\Entity(repositoryClass=YourEntityRepository::class)
 */
class YourEntity
{
    // Your entity properties and methods
}

?>

Step 3: Use the Custom Query Method

  1. Call the Custom Method: Use the repository in your service or controller to execute the custom query.

Example

<?php
// src/Controller/YourController.php
namespace App\Controller;

use App\Entity\YourEntity;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;

class YourController extends AbstractController
{
    public function someAction()
    {
        $repository = $this->getDoctrine()->getRepository(YourEntity::class);
        
        // Use the custom query method
        $results = $repository->findByCustomCriteria('yourValue');

        // Do something with the results
        return $this->render('your_template.html.twig', ['results' => $results]);
    }
}
?>

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