How to join two table in symfony 5?

by mallory_cormier , in category: PHP Frameworks , a month ago

How to join two table in symfony 5?

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1 answer

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by lottie , a month ago

@mallory_cormier 

In Symfony 5, you can join two tables using Doctrine's QueryBuilder. Here is a simple example of how to join two tables in Symfony 5:

  1. Define your entities in your Symfony project. For example, let's assume you have two entities: Product and Category.
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// src/Entity/Product.php

namespace AppEntity;

use DoctrineORMMapping as ORM;

/**
 * @ORMEntity
 * @ORMTable(name="products")
 */
class Product
{
    /**
     * @ORMId
     * @ORMGeneratedValue
     * @ORMColumn(type="integer")
     */
    private $id;

    /**
     * @ORMColumn(type="string")
     */
    private $name;

    /**
     * @ORMManyToOne(targetEntity="AppEntityCategory")
     * @ORMJoinColumn(name="category_id", referencedColumnName="id")
     */
    private $category;

    // Getters and Setters
}


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// src/Entity/Category.php

namespace AppEntity;

use DoctrineORMMapping as ORM;

/**
 * @ORMEntity
 * @ORMTable(name="categories")
 */
class Category
{
    /**
     * @ORMId
     * @ORMGeneratedValue
     * @ORMColumn(type="integer")
     */
    private $id;

    /**
     * @ORMColumn(type="string")
     */
    private $name;

    // Getters and Setters
}


  1. Use the QueryBuilder in your controller to join the two tables:
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// src/Controller/ProductController.php

namespace AppController;

use AppEntityProduct;
use DoctrineORMEntityManagerInterface;
use SymfonyComponentRoutingAnnotationRoute;

class ProductController extends AbstractController
{
    /**
     * @Route("/products", name="products")
     */
    public function index(EntityManagerInterface $entityManager)
    {
        $query = $entityManager->createQueryBuilder()
            ->select('p, c')
            ->from('AppEntityProduct', 'p')
            ->join('p.category', 'c')
            ->getQuery();

        $products = $query->getResult();

        return $this->render('products/index.html.twig', [
            'products' => $products,
        ]);
    }
}


In this example, we are using Doctrine's QueryBuilder to select both the Product and Category entities and joining them on the category_id field. This will fetch all the products along with their corresponding categories in a single query.