Symfony ArrayCollection 与 PersistentCollection

Posted 2023-02-24

【中文标题】Symfony ArrayCollection 与 PersistentCollection

【英文标题】：Symfony ArrayCollection vs PersistentCollection

【发布时间】：2016-09-25 18:20:21

【问题描述】：

据我了解，当您按存储库查询数据库时，您会得到 PersistentCollection，而当您使用实体时，您会得到 ArrayCollection。

所以考虑一下我的用户实体有一对多的自引用关系。

在我的用户实体中，我有一个 setChildren 方法，它获取用户的 ArrayCollection 作为参数。

<?php

namespace UserBundle\Entity;

use Abstracts\Entity\BaseModel;
use CertificateBundle\Entity\Certificate;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\Mapping as ORM;
use EducationBundle\Entity\Education;
use LanguageBundle\Entity\Language;
use PostBundle\Entity\Post;
use ProfileBundle\Entity\Company;
use RoleBundle\Entity\Role;
use SkillBundle\Entity\Skill;
use Symfony\Component\Security\Core\User\UserInterface;
use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;

/**
 * User
 *
 * @ORM\Table(name="users")
 * @ORM\Entity(repositoryClass="UserBundle\Repository\Entity\UserRepository")
 * @UniqueEntity("email")
 * @UniqueEntity("username")
 */
class User implements UserInterface



    use BaseModel;
    /**
     * @var int
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;


    /**
     * @var string
     *
     * @ORM\Column(name="type", type="string", columnDefinition="ENUM('merchant', 'company', 'customer') ")
     */
    private $type;


    /**
     * @ORM\Column(type="string", unique=true)
     * @Assert\NotBlank()
     */
    private $username;

    /**
     * @var string
     *
     * @ORM\Column(type="string", length=255)
     * @Assert\NotBlank()
     */
    private $email;


    /**
     * @var string
     * @ORM\Column(type="string", nullable=true)
     */
    private $avatar = null;
    /**
     * @var string
     * @ORM\Column(type="string", nullable=true)
     */
    private $cover = null;


    /**
     * @ORM\OneToMany(targetEntity="PostBundle\Entity\Post", mappedBy="user", orphanRemoval=true, cascade="persist", "remove")
     */
    private $posts;

    /**
     * @ORM\OneToMany(targetEntity="EducationBundle\Entity\Education" , mappedBy="user" , orphanRemoval=true, cascade="persist", "remove")
     */
    protected $educations;


    /**
     * @ORM\OneToMany(targetEntity="SkillBundle\Entity\SkillUser" , mappedBy="user" , orphanRemoval=true, cascade="persist", "remove")
     */
    protected $skills;

    /**
     * @ORM\OneToMany(targetEntity="LanguageBundle\Entity\LanguageUser" , mappedBy="user" , orphanRemoval=true, cascade="persist", "remove")
     */
    protected $languages;


    /**
     * @ORM\OneToMany(targetEntity="ResumeBundle\Entity\Resume" , mappedBy="user" , cascade="all")
     */
    protected $resumes;


    /**
     * @ORM\OneToMany(targetEntity="CertificateBundle\Entity\CertificateUser" , mappedBy="user" , orphanRemoval=true, cascade="persist", "remove")
     */
    protected $certificates;


    /**
     * @ORM\OneToOne(targetEntity="ProfileBundle\Entity\Company", mappedBy="user")
     */
    protected $company;

    /**
     * @ORM\OneToOne(targetEntity="ProfileBundle\Entity\Customer", mappedBy="user")
     */
    protected $customer;

    /**
     * @ORM\OneToOne(targetEntity="ProfileBundle\Entity\Merchant", mappedBy="user")
     */
    protected $merchant;




    /**
     * @var string
     * @Assert\NotBlank()
     * @Assert\Length(min=4)
     * @ORM\Column(name="password", type="string", length=255)
     *
     */
    private $password;

    /**
     * @ORM\ManyToMany(targetEntity="RoleBundle\Entity\Role", inversedBy="users", cascade="persist")
     * @ORM\JoinTable(name="user_role", joinColumns=@ORM\JoinColumn(name="user_id", referencedColumnName="id"), inverseJoinColumns=@ORM\JoinColumn(name="role_id", referencedColumnName="id"))
     */
    private $roles;



    /**
     * @ORM\ManyToOne(targetEntity="UserBundle\Entity\User", inversedBy="children")
     * @ORM\JoinColumn(name="parent_id", referencedColumnName="id", onDelete="SET NULL")
     */
    protected $parent;


    /**
     * @ORM\OneToMany(targetEntity="UserBundle\Entity\User", mappedBy="parent", orphanRemoval=true, cascade="persist", "remove")
     *
     */
    protected $children;


    /**
     * @var array
     */
    public static $fields = [ 'email', 'username', 'id', 'avatar', 'cover', 'type'];

    /**
     * User Entity constructor.
     */
    public function __construct(/*EncoderFactoryInterface $encoderFactory*/)
    
        //$this->encoderFactory = $encoderFactory;
        $this->posts        = new ArrayCollection();
        $this->skills       = new ArrayCollection();
        $this->languages    = new ArrayCollection();
        $this->certificates = new ArrayCollection();
        $this->educations   = new ArrayCollection();
        $this->children     = new ArrayCollection();

        dump($this->children);
        die();

    




    /**
     * @param User $user
     * @return $this
     */
    public function setParent(User $user)
    
        $this->parent = $user;

        return $this;
    


    /**
     * @return $this
     */
    public function removeParent()
    
        $this->parent = null;

        return $this;
    



    /**
     * @param User $user
     * @return $this
     */
    public function addChild(User $user)
    
        if(!$this->children->contains($user))
            $this->children->add($user);
        

        return $this;
    


    /**
     * @param User $user
     * @return bool
     */
    public function hasChild(User $user)
    
        return $this->children->contains($user);
    



    /**
     * @param User $user
     * @return bool
     */
    public function isChildOf(User $user)
    
        return $user->getChildren()->contains($this);
    

    /**
     * @return ArrayCollection
     */
    public function getChildren()
    
        return $this->children;
    

    /**
     * @param User $user
     * @return $this
     */
    public function removeChild(User $user)
    
        if($this->children->contains($user))
            $this->children->removeElement($user);
        

        return $this;
    

    /**
     * @param ArrayCollection $users
     * @return $this
     */
    public function setChildren(ArrayCollection $users)
    
        $this->children = $users;

        return $this;
    


    /**
     * @return $this
     */
    public function removeChildren()
    
        $this->children->clear();

        return $this;
    


    /**
     * @param ArrayCollection $certificates
     * @return $this
     */
    public function setCertificates(ArrayCollection $certificates)
    
        $this->certificates = $certificates;

        return $this;
    


    /**
     * @param Certificate $certificate
     * @return $this
     */
    public function addCertificate(Certificate $certificate)
    
        if(!$this->certificates->contains($certificate))
            $this->certificates->add($certificate);

        return $this;
    

    /**
     * @param Certificate $certificate
     * @return $this
     */
    public function removeCertificate(Certificate $certificate)
    
        if($this->certificates->contains($certificate))
            $this->certificates->removeElement($certificate);

        return $this;
    

    /**
     * @return $this
     */
    public function removeCertificates()
    
        $this->certificates->clear();

        return $this;
    


    /**
     * @param ArrayCollection $skills
     * @return $this
     */
    public function setSkills(ArrayCollection $skills)
    
        $this->skills = $skills;

        return $this;
    


    /**
     * @param Skill $skill
     * @return $this
     */
    public function addSkill(Skill $skill)
    
        if(!$this->skills->contains($skill))
            $this->skills->add($skill);

        return $this;
    

    /**
     * @param Skill $skill
     * @return $this
     */
    public function removeSkill(Skill $skill)
    
        if($this->skills->contains($skill))
            $this->skills->removeElement($skill);

        return $this;
    

    /**
     * @return $this
     */
    public function removeSkills()
    
        $this->skills->clear();

        return $this;
    




    /**
     * @param ArrayCollection $languages
     * @return $this
     */
    public function setLanguages(ArrayCollection $languages)
    
        $this->languages = $languages;

        return $this;
    


    /**
     * @param Language $language
     * @return $this
     */
    public function addLanguage(Language $language)
    
        if(!$this->languages->contains($language))
            $this->languages->add($language);

        return $this;
    

    /**
     * @param Language $language
     * @return $this
     */
    public function removeLanguage(Language $language)
    
        if($this->languages->contains($language))
            $this->languages->removeElement($language);

        return $this;
    

    /**
     * @return $this
     */
    public function removeLanguages()
    
        $this->languages->clear();

        return $this;
    


    /**
     * @param ArrayCollection $posts
     * @return $this
     */
    public function setPosts(ArrayCollection $posts)
    
        $this->posts = $posts;

        return $this;
    

    /**
     * @param Post $post
     * @return $this
     */
    public function addPost(Post $post)
    
        $this->posts->add($post);

        return $this;
    

    /**
     * @param Post $post
     * @return $this
     */
    public function removePost(Post $post)
    
        $this->posts->removeElement($post);

        return $this;
    

    /**
     * @return $this
     */
    public function removePosts()
    
        $this->posts->clear();

        return $this;
    


    /**
     * @param ArrayCollection $educations
     * @return $this
     */
    public function setEducations(ArrayCollection $educations)
    
        $this->educations = $educations;

        return $this;
    

    /**
     * @param Education $education
     * @return $this
     */
    public function addEducation(Education $education)
    
        $this->educations->add($education);

        return $this;
    

    /**
     * @param Education $education
     * @return $this
     */
    public function removeEducation(Education $education)
    
        $this->educations->removeElement($education);

        return $this;
    

    /**
     * @return $this
     */
    public function removeEducations()
    
        $this->educations->clear();

        return $this;
    


    /**
     * Get id
     *
     * @return integer
     */
    public function getId()
    
        return $this->id;
    

    /**
     * @param integer $id
     * @return $this
     */
    public function setId($id)
    
        $this->id = $id;

        return $this;
    

    /**
     * @return mixed
     */
    public function getType()
    
        return $this->type;
    

    /**
     * @param mixed $type
     * @return $this
     */
    public function setType($type)
    
        $this->type = $type;

        return $this;
    


    /**
     * Set email
     *
     * @param string $email
     * @return User
     */
    public function setEmail($email)
    
        $this->email = $email;

        return $this;
    


    /**
     * @return string
     */
    public function getEmail()
    
        return $this->email;
    


    /**
     * @param $username
     * @return $this
     */
    public function setUsername($username)
    
        $this->username = $username;
        return $this;
    

    /**
     * @return mixed
     */
    public function getUsername()
    
        return $this->username;
    

    /**
     * @return array
     */
    public function getRoles()
    
        return ['ROLE_USER', 'IS_AUTHENTICATED_ANONYMOUSLY'];
    

    /**
     * @param $password
     * @return $this
     */
    public function setPassword($password)
    
        //$password =$this->encoderFactory->getEncoder($this)->encodePassword($password, $this->getSalt());

        $this->password = $password;
        return $this;

    

    /**
     * @return string
     */
    public function getPassword()
    
        return $this->password;
    

    /**
     *
     */
    public function getSalt()
    
        return md5(sha1('somesalt'));
    

    /**
     *
     */
    public function eraseCredentials()
    
    

    /**
     * @param $cover
     * @return $this
     */
    public function setCover($cover)
    
        $this->cover = $cover;
        return $this;

    

    /**
     * @return string
     */
    public function getCover()
    
        return $this->cover;
    

    /**
     * @param $avatar
     * @return $this
     */
    public function setAvatar($avatar)
    
        $this->avatar = $avatar;
        return $this;

    

    /**
     * @return string
     */
    public function getAvatar()
    
        return $this->avatar;

    


    /**
     * @param Role $roles
     */
    public function addRoles(Role $roles)
    
        $this->roles[] = $roles;
    

    /**
     * @return mixed
     */
    public function getRoles2()
    
        return $this->roles;
    

    /**
     * @return array
     */
    public function getRolesAsArray()
    
        $rolesArray = [];
        foreach ($this->getRoles2() as $role) 
            $rolesArray[] = $role->getName();

        
        return $rolesArray;

    


    /**
     * @return Company
     */
    public function getCompany()
    
        return $this->company;
    

    /**
     * @param Company $company
     * @return $this
     */
    public function setCompany(Company $company)
    
        $this->company = $company;

        return $this;
    

这就是我想做的事情

$new_owner = $this->userRepository->findOneById($user_id, false);

$children = $old_owner->getChildren();

$old_owner->removeChildren();
$new_owner->setChildren($children);

我收到错误消息：

参数 1 传递给 Proxies__CG__\UserBundle\Entity\User::setChildren() 必须是 Doctrine\Common\Collections\ArrayCollection 的实例， 给定的 Doctrine\ORM\PersistentCollection

我应该将 setChildren 方法中的类型提示更改为 PersistentCollection 吗？ 还是我需要彻底改变我的方法？

【问题讨论】：

你的 $this->children 怎么样；在你的模型中？我可以有这两个模型吗？

我更新了上面的代码，以便您可以看到属性及其注释。两个模型都来自用户实体。这是一个自引用关系。

尝试添加public function __construct() $this->children = new ArrayCollection();

我已经这样做了！ :) 它只是没有出现在我的代码中

好吧，我无法理解 :) 你的控制器和完整模型中的完整方法看起来如何？

【参考方案1】：

在您的输入中添加 Collection $children

使用 Doctrine\Common\Collections\Collection; ...

private ?Collection $children;

symfony：5.3

【参考方案2】：

简答：

/**
 * @param Doctrine\Common\Collections\Collection $users
 * @return $this
 */
public function setChildren(Doctrine\Common\Collections\Collection $users)

    $this->children = $users;

    return $this;

解释：

如果您深入研究 Doctrine Classes，您会看到以下结构：

数组集合是实现接口Collection的类：

class ArrayCollection implements Collection, Selectable

PersistentCollection 是扩展 AbstractLazyCollection 的类：

final class PersistentCollection extends AbstractLazyCollection implements Selectable

但是 AbstractLazyCollection 实现了 Collection：

abstract class AbstractLazyCollection implements Collection

所以：

集合是接口，你应该在方法setChildren()中使用。

这是因为原则上使用延迟加载 - 允许加载并非所有属性的机制，而仅允许加载需要的这些属性。

类似的问题：

Doctrine manyToMany return PersistentCollection instead of ArrayCollection