Symfony Delete an user with Foreign Key - php

Question

I have a problem that i can't resolve. That's why i'm coming here.
On my website, an user can upload pictures and videos. When the user try to delete his account, he got a 500 error :
"SQLSTATE[23000]: Integrity constraint violation: 1451 Cannot delete or update a parent row: a foreign key constraint fails"
If i understood, i have to use "joinColumn" "onCascade" and "onDelete" (I want to keep the user's pictures and videos)
My User entity :
<?php
namespace App\Entity;
use App\Repository\UserRepository;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
use Symfony\Component\Security\Core\User\UserInterface;
/**
* #ORM\Entity(repositoryClass=UserRepository::class)
* #UniqueEntity(fields={"email"}, message="Cette adresse email est déjà utilisée.")
*/
class User implements UserInterface
{
/**
* #ORM\Id
* #ORM\GeneratedValue
* #ORM\Column(type="integer")
*/
private $id;
/**
* #ORM\Column(type="string", length=180, unique=true)
*/
private $email;
/**
* #ORM\Column(type="json")
*/
private $roles = [];
/**
* #var string The hashed password
* #ORM\Column(type="string")
*/
private $password;
/**
* #ORM\Column(type="boolean")
*/
private $isVerified = false;
/**
* #ORM\OneToMany(targetEntity=Picture::class, mappedBy="author")
*/
private $pictures;
/**
* #ORM\OneToMany(targetEntity=Video::class, mappedBy="author")
*/
private $videos;
/**
* #ORM\ManyToMany(targetEntity=Picture::class, mappedBy="fav")
*/
private $favoris;
/**
* #ORM\ManyToMany(targetEntity=Video::class, mappedBy="fav")
*/
private $fav;
public function __construct()
{
$this->pictures = new ArrayCollection();
$this->videos = new ArrayCollection();
$this->favoris = new ArrayCollection();
$this->fav = new ArrayCollection();
}
public function getId(): ?int
{
return $this->id;
}
public function getEmail(): ?string
{
return $this->email;
}
public function setEmail(string $email): self
{
$this->email = $email;
return $this;
}
/**
* A visual identifier that represents this user.
*
* #see UserInterface
*/
public function getUsername(): string
{
return (string) $this->email;
}
/**
* #see UserInterface
*/
public function getRoles(): array
{
$roles = $this->roles;
// guarantee every user at least has ROLE_USER
$roles[] = 'ROLE_USER';
return array_unique($roles);
}
public function setRoles(array $roles): self
{
$this->roles = $roles;
return $this;
}
/**
* #see UserInterface
*/
public function getPassword(): string
{
return (string) $this->password;
}
public function setPassword(string $password): self
{
$this->password = $password;
return $this;
}
/**
* Returning a salt is only needed, if you are not using a modern
* hashing algorithm (e.g. bcrypt or sodium) in your security.yaml.
*
* #see UserInterface
*/
public function getSalt(): ?string
{
return null;
}
/**
* #see UserInterface
*/
public function eraseCredentials()
{
// If you store any temporary, sensitive data on the user, clear it here
// $this->plainPassword = null;
}
public function isVerified(): bool
{
return $this->isVerified;
}
public function setIsVerified(bool $isVerified): self
{
$this->isVerified = $isVerified;
return $this;
}
/**
* #return Collection|Picture[]
*/
public function getPictures(): Collection
{
return $this->pictures;
}
public function addPicture(Picture $picture): self
{
if (!$this->pictures->contains($picture)) {
$this->pictures[] = $picture;
$picture->setAuthor($this);
}
return $this;
}
public function removePicture(Picture $picture): self
{
if ($this->pictures->removeElement($picture)) {
// set the owning side to null (unless already changed)
if ($picture->getAuthor() === $this) {
$picture->setAuthor(null);
}
}
return $this;
}
/**
* #return Collection|Video[]
*/
public function getVideos(): Collection
{
return $this->videos;
}
public function addVideo(Video $video): self
{
if (!$this->videos->contains($video)) {
$this->videos[] = $video;
$video->setAuthor($this);
}
return $this;
}
public function removeVideo(Video $video): self
{
if ($this->videos->removeElement($video)) {
// set the owning side to null (unless already changed)
if ($video->getAuthor() === $this) {
$video->setAuthor(null);
}
}
return $this;
}
/**
* #return Collection|Picture[]
*/
public function getFavoris(): Collection
{
return $this->favoris;
}
public function addFavori(Picture $favori): self
{
if (!$this->favoris->contains($favori)) {
$this->favoris[] = $favori;
$favori->addFav($this);
}
return $this;
}
public function removeFavori(Picture $favori): self
{
if ($this->favoris->removeElement($favori)) {
$favori->removeFav($this);
}
return $this;
}
/**
* #return Collection|Video[]
*/
public function getFav(): Collection
{
return $this->fav;
}
public function addFav(Video $fav): self
{
if (!$this->fav->contains($fav)) {
$this->fav[] = $fav;
$fav->addFav($this);
}
return $this;
}
public function removeFav(Video $fav): self
{
if ($this->fav->removeElement($fav)) {
$fav->removeFav($this);
}
return $this;
}
}
My Picture entity :
<?php
namespace App\Entity;
use App\Repository\PictureRepository;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\ORM\Mapping as ORM;
use Gedmo\Mapping\Annotation as Gedmo;
/**
* #ORM\Entity(repositoryClass=PictureRepository::class)
*/
class Picture
{
/**
* #ORM\Id
* #ORM\GeneratedValue
* #ORM\Column(type="integer")
*/
private $id;
/**
* #ORM\Column(type="string", length=150)
*/
private $title;
/**
* #ORM\Column(type="text")
*/
private $description;
/**
* #ORM\Column(type="string", length=255, unique=true)
* #Gedmo\Slug(fields={"title"})
*/
private $slug;
public function getSlug(): ?string
{
return $this->slug;
}
public function setSlug(string $slug): self
{
$this->slug = $slug;
return $this;
}
/**
* #ORM\Column(type="datetime")
*/
private $publication_date;
/**
* #ORM\ManyToOne(targetEntity=User::class, inversedBy="pictures")
* #ORM\JoinColumn(nullable=false)
*/
private $author;
/**
* #ORM\Column(type="string", length=150)
*/
private $category;
/**
* #ORM\Column(type="string", length=50)
*/
private $image;
/**
* #ORM\ManyToMany(targetEntity=User::class, inversedBy="favoris")
*/
private $fav;
public function __construct()
{
$this->fav = 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 getDescription(): ?string
{
return $this->description;
}
public function setDescription(string $description): self
{
$this->description = $description;
return $this;
}
public function getPublicationDate(): ?\DateTimeInterface
{
return $this->publication_date;
}
public function setPublicationDate(\DateTimeInterface $publication_date): self
{
$this->publication_date = $publication_date;
return $this;
}
public function getAuthor(): ?User
{
return $this->author;
}
public function setAuthor(?User $author): self
{
$this->author = $author;
return $this;
}
public function getCategory(): ?string
{
return $this->category;
}
public function setCategory(string $category): self
{
$this->category = $category;
return $this;
}
public function getImage(): ?string
{
return $this->image;
}
public function setImage(string $image): self
{
$this->image = $image;
return $this;
}
/**
* #return Collection|User[]
*/
public function getFav(): Collection
{
return $this->fav;
}
public function addFav(User $fav): self
{
if (!$this->fav->contains($fav)) {
$this->fav[] = $fav;
}
return $this;
}
public function removeFav(User $fav): self
{
$this->fav->removeElement($fav);
return $this;
}
}
My Video entity :
<?php
namespace App\Entity;
use App\Repository\VideoRepository;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\ORM\Mapping as ORM;
/**
* #ORM\Entity(repositoryClass=VideoRepository::class)
*/
class Video
{
/**
* #ORM\Id
* #ORM\GeneratedValue
* #ORM\Column(type="integer")
*/
private $id;
/**
* #ORM\Column(type="string", length=150)
*/
private $title;
/**
* #ORM\Column(type="text")
*/
private $description;
/**
* #ORM\Column(type="datetime")
*/
private $publication_date;
/**
* #ORM\ManyToOne(targetEntity=User::class, inversedBy="videos")
* #ORM\JoinColumn(nullable=false)
*/
private $author;
/**
* #ORM\Column(type="string", length=150)
*/
private $category;
/**
* #ORM\Column(type="string", length=50)
*/
private $vid;
/**
* #ORM\ManyToMany(targetEntity=User::class, inversedBy="fav")
*/
private $fav;
public function __construct()
{
$this->fav = 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 getDescription(): ?string
{
return $this->description;
}
public function setDescription(string $description): self
{
$this->description = $description;
return $this;
}
public function getPublicationDate(): ?\DateTimeInterface
{
return $this->publication_date;
}
public function setPublicationDate(\DateTimeInterface $publication_date): self
{
$this->publication_date = $publication_date;
return $this;
}
public function getAuthor(): ?User
{
return $this->author;
}
public function setAuthor(?User $author): self
{
$this->author = $author;
return $this;
}
public function getCategory(): ?string
{
return $this->category;
}
public function setCategory(string $category): self
{
$this->category = $category;
return $this;
}
public function getVid(): ?string
{
return $this->vid;
}
public function setVid(string $vid): self
{
$this->vid = $vid;
return $this;
}
/**
* #return Collection|User[]
*/
public function getFav(): Collection
{
return $this->fav;
}
public function addFav(User $fav): self
{
if (!$this->fav->contains($fav)) {
$this->fav[] = $fav;
}
return $this;
}
public function removeFav(User $fav): self
{
$this->fav->removeElement($fav);
return $this;
}
}

Answer 1

If you want to - when deleting a user - delete all his pictures and videos as well, you can just add cascade delete to the associations:
/**
* #ORM\OneToMany(targetEntity=Picture::class, mappedBy="author", cascade={"delete"})
*/
private $pictures;
/**
* #ORM\OneToMany(targetEntity=Video::class, mappedBy="author", cascade={"delete"})
*/
private $videos;
If you instead want to keep them and just remove the associoation to the user, add ON DELETE SET NULL to your author_id foreign keys in picture and video tables:
/**
* #ORM\ManyToOne(targetEntity=User::class, inversedBy="videos")
* #ORM\JoinColumn(nullable=true, onDelete="SET NULL")
*/
private $author;
Then you have to assume in your code that $this->author can be null.