这里是问题:
[两个实体,书籍和Auteurs。一本书只有一个作者,一个作者可以有多本书。
如果我在Auteurs表中创建一本具有现有auteur的书,则在填充库时,这会(错误地)在表中创建重复项。
级联=“ persist”注释的存在是此副本的起点。如果删除此注释,则会出现错误:
{“错误”:{“代码”:500,“消息”:“内部服务器错误”,“例外”:[{“消息”:“通过关系'App \ Entity \ Books#找到了一个新实体auteur'.....
如何处理这个问题?我的代码:控制器:
<?php
namespace App\Controller;
use App\Entity\Books;
use FOS\RestBundle\Controller\Annotations as Rest;
use FOS\RestBundle\Controller\FOSRestController;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\ParamConverter;
class EcritureController extends FOSRestController
{
/**
* @Rest\Post(
* path = "/creer-book")
* @Rest\View(StatusCode = 201)
* @ParamConverter("book", converter="fos_rest.request_body")
*/
public function creerBook(Books $book)
{
$em->persist($book);
$em->flush();
return $book;
}
}
实体书籍:
<?php
namespace App\Entity;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\ORM\Mapping as ORM;
/**
* @ORM\Entity(repositoryClass="App\Repository\BooksRepository")
*/
class Books
{
/**
* @ORM\Id()
* @ORM\GeneratedValue()
* @ORM\Column(type="integer")
*/
private $id;
/**
* @ORM\Column(type="string", length=255)
*/
private $titre;
/**
* @ORM\ManyToOne(targetEntity="App\Entity\Books", inversedBy="Books", cascade={"persist"})
* @ORM\JoinColumn(nullable=false)
*/
private $auteur;
public function getId(): ?int
{
return $this->id;
}
public function getTitre(): ?string
{
return $this->Titre;
}
public function setTitre(string $titre): self
{
$this->titre = $titre;
return $this;
}
public function getAuteur(): ?Auteurs
{
return $this->auteur;
}
public function setAuteur(?Auteurs $auteur): self
{
$this->auteur = $auteur;
return $this;
}
}
实体Auteurs:
<?php
namespace App\Entity;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\ORM\Mapping as ORM;
/**
* @ORM\Entity(repositoryClass="App\Repository\AuteursRepository")
*/
class Auteurs
{
/**
* @ORM\Id()
* @ORM\GeneratedValue()
* @ORM\Column(type="integer")
*/
private $id;
/**
* @ORM\Column(type="string", length=10)
*/
private $nom;
/**
* @ORM\OneToMany(targetEntity="App\Entity\Books", mappedBy="auteur")
*/
private $books;
public function __construct()
{
$this->books = new ArrayCollection();
}
public function getId(): ?int
{
return $this->id;
}
public function getNom(): ?string
{
return $this->nom;
}
public function setNom(string $nom): self
{
$this->nom = $nom;
return $this;
}
/**
* @return Collection|Books[]
*/
public function getBooks(): Collection
{
return $this->books;
}
public function addBook(Books $book): self
{
if (!$this->books->contains($book)) {
$this->books[] = $book;
$book->setBook($this);
}
return $this;
}
public function removeBook(Books $book): self
{
if ($this->books->contains($book)) {
$this->sujets->removeElement($book);
// set the owning side to null (unless already changed)
if ($book->getAuteur() === $this) {
$book->setAuteur(null);
}
}
return $this;
}
}
错误是“坚持”“许多”方面。必须坚持“一个”方面,如下所示:
$auteurId = $book->getAuteur()->getId();
$auteur= $em->getRepository('App:Auteurs')->find($auteurId);
$response = new Response();
if ($auteur) {
$auteur->addBook($book);
$em->persist($auteur);
$em->flush();
$response->setContent('Chain of your choice', Response::HTTP_OK);
} else {
$response->setContent('Auteur selected doesn\'t exist', Response::HTTP_NOT_ACCEPTABLE);
}
return $response;