Class Doctrine\Common\Persistence\ObjectManager does not exist-CodePudding

hi guys so im working in some symfony project and this error still display to me i have changed the Doctrine\Common\Persistence\ObjectManager to Doctrine\ORM\EntityManagerInterface; and still not working please i need some help it's for my university exams i tried alot to fix this issues even i look it up to stackoerflow about a solution but i didn't find anything can help

    <?php

namespace App\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;
use App\Entity\Article;
use App\Repository\ArticleRepository;
use Symfony\Component\HttpFoundation\Request;
use Doctrine\Common\Persistence\ObjectManager;
class BlogController extends AbstractController
{
/**
 * @Route("/blog", name="blog")
 */
public function index(ArticleRepository $repo): Response
{
   // $repo = $this->getDoctrine()->getRepository(Article::class);
    $articles = $repo->findAll();

    return $this->render('blog/index.html.twig', [
        'controller_name' => 'BlogController',
        'articles' => $articles
    ]);
}
/**
 * @Route("/",name="home")
 */
public function home(){
    return $this->render("blog/home.html.twig",[
        "title"=> "miral",
        "age" => 31
    ]);
}

   /**
 * @Route("/blog/new", name="blog_create")
 */
public function create(Request $request, ObjectManager $manager){
    dump($request);
    if($request->request->count() > 0){
        $article = new Article();
        $article->setTitle($request->request->get('title'))
        ->setContent($request->request->get('content'))
        ->setImage($request->request->get('image'));
        $manager->persist($article);
        $manager->flush();
    }
    return $this->render("blog/create.html.twig");

}

/**
 * @Route("/blog/{id}",name="blog_show")
 */
//ArticleRepository $repo, $id
public function show(Article $article){
    //$repo=$this->getDoctrine()->getRepository(Article::class);
   // $article= $repo->find($id);
    return $this->render("blog/show.html.twig",[
        'article' => $article
    ]);
}

}

CodePudding user response：

You most likely need to use Doctrine\Persistence\ObjectManager instead of Doctrine\Common\Persistence\ObjectManager which has been removed in newer versions of Doctrine. However, there is no alias for that class so I guess the easiest way would be to use Doctrine\ORM\EntityManagerInterface.

Try this.

<?php

namespace App\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;
use App\Entity\Article;
use App\Repository\ArticleRepository;
use Symfony\Component\HttpFoundation\Request;
use Doctrine\ORM\EntityManagerInterface;

class BlogController extends AbstractController
{
    /**
     * @Route("/blog", name="blog")
     */
    public function index(ArticleRepository $repo): Response
    {
        $articles = $repo->findAll();

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

    /**
     * @Route("/",name="home")
     */
    public function home()
    {
        return $this->render("blog/home.html.twig", [
            "title" => "miral",
            "age"   => 31
        ]);
    }

    /**
     * @Route("/blog/new", name="blog_create")
     */
    public function create(Request $request, EntityManagerInterface $manager)
    {
        if ($request->request->count() > 0) {
            $article = new Article();
            $article->setTitle($request->request->get('title'))
                ->setContent($request->request->get('content'))
                ->setImage($request->request->get('image'))
            ;
            $manager->persist($article);
            $manager->flush();
        }

        return $this->render("blog/create.html.twig");

    }

    /**
     * @Route("/blog/{id}",name="blog_show")
     */
    public function show(Article $article)
    {
        return $this->render("blog/show.html.twig", [
            'article' => $article
        ]);
    }

}

CodePudding user response：

There are no classes related to persistence in the Doctrine\Common namespace. So you have to use i.e. Doctrine\DBAL.