Symfony Doctrine - 使用 ManyToMany 制作裝置

Question

我將 Symfony 4.2 與 Doctrine 一起使用，並且我想用兩個實體創建具有 ManyToMany 關系的裝置：

• 組織
• 項目

但是當我加載裝置時，連接表（organization_project）總是空的。 所以，我不知道我的人際關系是否良好。

簡歷：

• 許多組織有許多項目
• 許多項目有許多組織

數據庫視圖

這是我的Organization實體

class Organization
{
    /**
     * @ORM\Id()
     * @ORM\GeneratedValue()
     * @ORM\Column(type="integer")
     */
    private $id;

    ...

    /** 
     * @ORM\ManyToMany(targetEntity="App\Entity\Project", mappedBy="organizations")
     */
    private $projects;

    /**
     * @return Collection|Project[]
     */
    public function getProjects(): Collection
    {
        return $this->projects;
    }

    public function addProject(Project $project): self
    {
        if (!$this->projects->contains($project)) {
            $this->projects[] = $project;
            $project->addOrganization($this);
        }

        return $this;
    }

    public function removeProject(Project $project): self
    {
        if ($this->projects->contains($project)) {
            $this->projects->removeElement($project);
            $project->removeOrganization($this);
        }

        return $this;
    }
}

這是我的Project實體：

class Project
{
    /**
     * @ORM\Id()
     * @ORM\GeneratedValue()
     * @ORM\Column(type="integer")
     */
    private $id;

    ...

    /** 
     * @ORM\ManyToMany(targetEntity="App\Entity\Organization", inversedBy="projects")
     */
    private $organizations

    /**
     * @return Collection|Organization[]
     */
    public function getOrganizations(): Collection
    {
        return $this->organizations;
    }

    public function addOrganization(Organization $organization): self
    {
        if (!$this->organizations->contains($organization)) {
            $this->organizations[] = $organization;
        }

        return $this;
    }

    public function removeOrganization(Organization $organization): self
    {
        if ($this->organizations->contains($organization)) {
            $this->organizations->removeElement($organization);
        }

        return $this;
    }

}

這是我的Organization裝置：

class OrganizationFixtures extends Fixture implements DependentFixtureInterface
{
    public const ORGANIZATION_REFERENCE = 'organization-';

    public function load(ObjectManager $manager)
    {
        $organization = new Organization();
        $this->addReference(self::ORGANIZATION_REFERENCE.'0', $organization);
        $organization->addProject($this->getReference('project-0'));

        $manager->persist($organization);
        $manager->flush();
    }

     public function getDependencies()
    {
        return array(
            ProjectFixtures::class
        );
    }
} 

這是我的Project夾具：

class ProjectFixtures extends Fixture
{
    public const PROJECT_REFERENCE = 'project-';

    public function load(ObjectManager $manager)
    {
        $project = new Project();
        $this->addReference(self::PROJECT_REFERENCE.'0', $project);

        $manager->persist($project);
        $manager->flush();
    }
} 

謝謝，

Answer 1

您的Organization不是關系的擁有方。 它不知道加入表（在ManyToOne它是關於誰持有外鍵）。 此外，您沒有在persist上指定級聯，因此不會persist非擁有方的關聯實體。 因此，對於您當前的夾具結構，最佳關聯方向是這樣的。

class Organization
{
...

    /** 
     * @ORM\ManyToMany(targetEntity="App\Entity\Project", inversedBy="organizations", cascade={"persist"})
     * @ORM\JoinTable(name="organization_project") # this one is not necessary
                                                       putting here for reference
     */
    private $projects;
...
]

class Project
{
...
    /** 
     * @ORM\ManyToMany(targetEntity="App\Entity\Organization", mappedBy="projects", cascade={"persist"})
     */
    private $organizations;
...
}