Doctrine 中的多对多关系

Question

我是 Symfony 的新手，我正在一个电影网站上工作，您可以在其中制作电影和 link 令人兴奋的电影演员。我已经声明了与 Doctrine 的关系，并且我拥有所有制作的电影，但我找不到显示与电影相关的演员的方法。学说已经让我成为了支点 table movie_actor

我的电影实体

<?php

namespace App\Entity;

use App\Repository\MovieRepository;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\ORM\Mapping as ORM;
use JetBrains\PhpStorm\Pure;
use Symfony\Component\Validator\Constraints as Assert;

#[ORM\Entity(repositoryClass: MovieRepository::class)]
class Movie
{
    #[ORM\Id]
    #[ORM\GeneratedValue]

    #[ORM\Column(type: 'integer')]

    private $id;

    #[ORM\Column(type: 'string', length: 255)]

    private $title;

    #[ORM\Column(type: 'integer')]

    private $releaseYear;

    #[ORM\Column(type:'string', length:255,  nullable: true)]
    /**
     * @Assert\NotBlank

     */
    private $description;

    #[ORM\Column(type: 'string', length: 255)]

    private $imagePath;

    #[ORM\ManyToMany(targetEntity: Actor::class, inversedBy: 'movies')]

    private $actors;


    public function __construct()
    {
        $this->actors = new ArrayCollection();
    }

    public function getId(): ?int
    {
        return $this->id;
    }

    public function getTitle(): ?string
    {
        return $this->title;
    }

    public function setTitle(?string $title): self
    {
        $this->title = $title;

        return $this;
    }

    public function getReleaseYear(): ?int
    {
        return $this->releaseYear;
    }

    public function setReleaseYear(?int $releaseYear): self
    {
        $this->releaseYear = $releaseYear;

        return $this;
    }

    public function getDescription(): ?string
    {
        return $this->description;
    }

    public function setDescription(?string $description): self
    {
        $this->description = $description;

        return $this;
    }

    public function getImagePath(): ?string
    {
        return $this->imagePath;
    }

    public function setImagePath(?string $imagePath): self
    {
        $this->imagePath = $imagePath;

        return $this;
    }

    /**
     * @return Collection<int, Actor>
     */
    public function getActors(): Collection
    {
        return $this->actors;
    }


    public function addActor(Actor $actor): self
    {
        if (!$this->actors->contains($actor)) {
            $this->actors[] = $actor;
        }

        return $this;
    }

    public function removeActor(Actor $actor): self
    {
        $this->actors->removeElement($actor);

        return $this;
    }

}

我的演员实体

<?php

namespace App\Entity;

use App\Repository\ActorRepository;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\ORM\Mapping as ORM;

#[ORM\Entity(repositoryClass: ActorRepository::class)]
class Actor
{
    #[ORM\Id]
    #[ORM\GeneratedValue]
    #[ORM\Column(type: 'integer')]
    private $id;

    #[ORM\Column(type: 'string', length: 255)]
    private $name;

    #[ORM\ManyToMany(targetEntity: Movie::class, mappedBy: 'actors')]
    private $movies;

    public function __construct()
    {
        $this->movies = new ArrayCollection();
    }

    public function getId(): ?int
    {
        return $this->id;
    }

    public function getName(): ?string
    {
        return $this->name;
    }

    public function setName(string $name): self
    {
        $this->name = $name;

        return $this;
    }

    /**
     * @return Collection<int, Movie>
     */
    public function getMovies(): Collection
    {
        return $this->movies;
    }

    public function addMovie(Movie $movie): self
    {
        if (!$this->movies->contains($movie)) {
            $this->movies[] = $movie;
            $movie->addActor($this);
        }

        return $this;
    }

    public function removeMovie(Movie $movie): self
    {
        if ($this->movies->removeElement($movie)) {
            $movie->removeActor($this);
        }

        return $this;
    }

}

电影控制器

<?php

namespace App\Controller;

use App\Entity\Actor;
use App\Entity\Movie;
use App\Form\MovieFormType;
use App\Repository\MovieRepository;
use App\Repository\ActorRepository;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\File\Exception\FileException;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\Validator\Validator\ValidatorInterface;

class MoviesController extends AbstractController
{
    private $em;
    private $movieRepository;
    public function __construct(EntityManagerInterface $em, MovieRepository $movieRepository,ActorRepository $actorRepository )
    {
        $this->em = $em;
        $this->movieRepository = $movieRepository;
        $this->actorRepository = $actorRepository;
    }

    #[Route('/movies', name: 'movies')]
    public function index(): Response
    {
        $movies = $this->movieRepository->findAll();
        $actors = $this->actorRepository->findAll();


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

    #[Route('/movies/create', name: 'create_movie')]
    public function create(Request $request): Response
    {
        $movie = new Movie();
        $form = $this->createForm(MovieFormType::class, $movie);

        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $newMovie = $form->getData();

            $imagePath = $form->get('imagePath')->getData();
            if($imagePath){
                $newFileName = uniqid() . '.' . $imagePath->guessExtension();
                try{
                    $imagePath->move(
                        $this->getParameter('kernel.project_dir') . '/public/uploads',
                        $newFileName
                    );
                } catch(FileException $e){
                    return new Response($e->getMessage());
                }
                $newMovie->setImagePath('/uploads/' . $newFileName);
            }
            $this->em->persist($newMovie);
            $this->em->flush();

            return $this->redirectToRoute('movies');
        }

        return $this->render('movies/create.html.twig', [
            'form' => $form->createView()
        ]);
    }

    #[Route('/movies/edit/{id}', name: 'edit_movie')]
    public function edit($id, Request $request): Response
    {
        $this->checkLoggedInUser($id);
        $movie = $this->movieRepository->find($id);

        $form = $this->createForm(MovieFormType::class, $movie);

        $form->handleRequest($request);
        $imagePath = $form->get('imagePath')->getData();

        if ($form->isSubmitted() && $form->isValid()) {
            if ($imagePath) {
                if ($movie->getImagePath() !== null) {
                    if (file_exists(
                        $this->getParameter('kernel.project_dir') . $movie->getImagePath()
                    )) {
                        $this->GetParameter('kernel.project_dir') . $movie->getImagePath();
                    }
                    $newFileName = uniqid() . '.' . $imagePath->guessExtension();

                    try {
                        $imagePath->move(
                            $this->getParameter('kernel.project_dir') . '/public/uploads/',
                            $newFileName
                        );
                    } catch (FileException $e) {
                        return new Response($e->getMessage());
                    }

                    $movie->setImagePath('/uploads/' . $newFileName);
                    $this->em->flush();

                    return $this->redirectToRoute('movies');
                }
            } else {
                $movie->setTitle($form->get('title')->getData());
                $movie->setReleaseYear($form->get('releaseYear')->getData());
                $movie->setDescription($form->get('description')->getData());

                $this->em->flush();
                return $this->redirectToRoute('movies');
            }
        }

        return $this->render('movies/edit.html.twig', [
            'movie' => $movie,
            'form' => $form->createView()
        ]);
    }

    #[Route('/movies/delete/{id}', name: 'delete_movie', methods: ['GET', 'DELETE'])]
    public function delete($id): Response
    {
        $this->checkLoggedInUser($id);
        $movie = $this->movieRepository->find($id);
        $this->em->remove($movie);
        $this->em->flush();

        return $this->redirectToRoute('movies');
    }

    #[Route('/movies/{id}', name: 'show_movie', methods: ['GET'])]
    public function show($id): Response
    {
        $movie = $this->movieRepository->find($id);
        $actor = $this->actorRepository->find($id);
//        $movie = Movie::find(6);
//        dd($movie->actors);
//        $actor = Actor::find(6);
//        $actor->movies()->sync([5]);
//       dd($actor->movies);



        return $this->render('movies/show.html.twig', [
            'movie' => $movie

        ]);
    }

    private function checkLoggedInUser($movieId) {
        if($this->getUser() == null || $this->getUser()->getId() !== $movieId) {
            return $this->redirectToRoute('movies');
        }
    }
}

如有任何帮助，我们将不胜感激

Answer 1

您可以使用 createQueryBuilder 在你的控制器上，你可以添加这个：

$qb = $entity_manager->createQueryBuilder();
$qb
    ->select('movie')
    ->from(Movie::class, 'movie')
    ->leftJoin('movie.actors', 'actors')
    ->addSelect('actors')
;

$movies = $qb->getQuery()->getResult();

并在您的模板上传递 $movies。

查询中的 addSelect 方法允许 doctrine 识别 Actor 和 Movie 之间的多对多关系。

在您的模板上，您可以这样显示结果：

<ul>
    {% for movie in movies %}
        <li>{{ movie.title }}</li>
        <ol>
            {% for actor in movie.actors %}
                <li>{{ actor.name }}</li>
            {% endfor %}
        </ol>
    {% endfor %}
</ul>

Answer 2

我使用 movieRepostery 解决了我的问题，方法是将此代码添加到我的 public 函数显示中，我搜索的位置只是为了通过其 $id

显示一部电影

 $movies = $this->movieRepository->find($id);

        return $this->render('movies/show.html.twig', [
            'movies' => $movies



        ]);

然后我在我的 show.html.twig 中使用了两个 for 循环，即：

 {% for actor in movies.actors %}


                    <div class="xl:w-1/3 md:w-1/2 p-4 m-auto">
                        <a href="/actors/{{ actor.id }}">
                            <div class="bg-white p-6 rounded-lg">
                                <img class="lg:h-60 xl:h-56 md:h-64 sm:h-72 xs:h-72 h-72  rounded w-full object-cover object-center mb-6" src="{{ actor.imagePath }}">
                                <h3 class="tracking-widest text-indigo-500 text-lg font-medium title-font">{{ actor.name }}</h3>
                                <h2 class="text-lg text-gray-900 font-medium title-font mb-4">Description</h2>
                                <p class="leading-relaxed text-base  truncate ...">{{ actor.description }}</p>
                            </div>
                        </a>
                    </div>


                {% endfor %}

我使用了一个循环，因为一部电影有多个演员

Doctrine 中的多对多关系

Many To Many relationship in Doctrine

php

sql

symfony

doctrine-orm

laravel