数组集合，symfony：添加关系 [关闭]

Question

我是 Symfony 和 php 的新手，我试图在没有结果的情况下理解数组集合。

现在我有两个实体，Mission 和 User，与 ManytoMany 相关。我有一个创建新任务的表单和一个创建新用户的表单。

现在我必须创建一个“modifyMissionAction”，允许我为该任务设置用户，但我不明白如何去做。 我阅读了文档here，但没有帮助。我该怎么办？

谢谢

这是我的用户实体是：

 abstract class User extends BaseUser
 {

      /**
      * @var \Doctrine\Common\Collections\ArrayCollection
      * 
      * @ORM\ManyToMany(targetEntity="Acme\ManagementBundle\Entity\Mission", inversedBy="users", orphanRemoval=true)
      * @ORM\JoinTable(name="user_mission")
      */
     private $missions;    
     /**
      * Add missions
      *
      * @param \Acme\ManagementBundle\Entity\Mission $missions
      * @return User
      */
     public function addMission(\Acme\ManagementBundle\Entity\Mission $missions)
     {
         $this->missions[] = $missions;

         return $this;
     }
//...

还有我的任务实体：

<?php

namespace Acme\ManagementBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;

/**
 * @ORM\Entity
 */
class Mission {
    /** 
     * @ORM\Id
     * @ORM\GeneratedValue
     * @ORM\Column(type="integer")
     * @var integer
     */
    protected $id;
        /** 
     * @ORM\Column(type="string", length=60)
     * @var String
     */
    protected $name;
    /** 
     * @ORM\Column(type="string", length=600)
     * @var String
     */
    protected $description;
    /**
     * @var \Doctrine\Common\Collections\ArrayCollection
     *
     * @ORM\ManyToMany(targetEntity="Acme\ManagementBundle\Entity\User", mappedBy="missions", cascade={"all"}, orphanRemoval=true)
     */
    private $users;

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

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

    /**
     * Set name
     *
     * @param string $name
     * @return Mission
     */
    public function setName($name)
    {
        $this->name = $name;

        return $this;
    }

    /**
     * Get name
     *
     * @return string 
     */
    public function getName()
    {
        return $this->name;
    }

    /**
     * Set description
     *
     * @param string $description
     * @return Mission
     */
    public function setDescription($description)
    {
        $this->description = $description;

        return $this;
    }

    /**
     * Get description
     *
     * @return string 
     */
    public function getDescription()
    {
        return $this->description;
    }

    /**
     * Add users
     *
     * @param \Acme\ManagementBundle\Entity\User $users
     * @return Mission
     */
    public function addUser(\Acme\ManagementBundle\Entity\User $users)
    {
        $this->users[] = $users;

        return $this;
    }

    /**
     * Remove users
     *
     * @param \Acme\ManagementBundle\Entity\User $users
     */
    public function removeUser(\Acme\ManagementBundle\Entity\User $users)
    {
        $this->users->removeElement($users);
    }

    /**
     * Get users
     *
     * @return \Doctrine\Common\Collections\Collection 
     */
    public function getUsers()
    {
        return $this->users;
    }
    public function __toString()
    {
        return $this->name;
    }
}

Answer 1

首先不要忘记为类和初始化 ArrayCollection 添加 __constructor：

//src/WebHQ/NewBundle/Entity/Mission.php
//...
public function __construct()
{
    $this->users = new ArrayCollection();
}
//...

我假设您想添加控制器动作，女巫允许您将用户对象或对象与任务对象相关联。请阅读 Symfony book 的嵌入表单部分

然后创建您的操作。最重要的是添加表单元素，其中嵌入了用户实体的表单：

// src/WebHQ/NewBundle/Controller/MissionController.php
//...
public function newAction(Request $request)
{
    $object = new \WebHQ\NewBundle\Entity\Mission();

    $form = $this->createFormBuilder($object)
            ->add('name', 'text')
            //...
            // Users objects embed form
            ->add('users', 'user')
            //...
            ->add('save', 'submit')
            ->getForm();

    if ($request->isMethod('POST')) {
        $form->bind($request);

        if ($form->isValid()) {
            $em = $this->getDoctrine()->getManager();
            $em->persist($object);
            $em->flush();

            return $this->redirect($this->generateUrl('web_hq_new_mission_index'));
        }
    }

    return $this->render('WebHQNewBundle:Mission:new.html.twig', array(
        'form'      => $form->createView(),
        //...
    ));
}

public function editAction($id, Request $request)
{
    $object = $this->getDoctrine()
            ->getRepository('WebHQNewBundle:Mission')
            ->find($id);

    $form = $this->createFormBuilder($object)
            ->add('name', 'text')
            //...
            ->add('users', 'user')
            //...
            ->add('save', 'submit')
            ->add('delete', 'submit')
            ->getForm();

    if ($request->isMethod('POST')) {
        $form->bind($request);

        if ($form->isValid()) {
            $em = $this->getDoctrine()->getManager();
            $form->get('save')->isClicked() ? $em->persist($object) : $em->remove($object);
            $em->flush();

            return $this->redirect($this->generateUrl('web_hq_new_mission_index'));
        }
    }

    return $this->render('WebHQNewBundle:Mission:edit.html.twig', array(
        'form'      => $form->createView(),
        //...
    ));
}
//...

检查您的路线。您应该有使用{id} 参数进行编辑操作的路线。如果参数名称不适合您在路由和函数定义中更改它：

// src/WebHQ/NewBundle/Resources/config/route.yml
//...
web_hq_new_mission_new:
    pattern: /mission/new
    defaults: { _controller: WebHQNewBundle:Mission:new }

web_hq_new_mission_edit:
    pattern: /mission/{id}/edit
    defaults: { _controller: WebHQNewBundle:Mission:edit }
//...

然后为用户对象定义表单类型：

// src/WebHQ/NewBundle/Form/Type/UserType.php
namespace WebHQ\NewBundle\Form\Type;

use Doctrine\ORM\EntityRepository;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\OptionsResolver\Options;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;


class UserType extends AbstractType
{
    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'class' => 'WebHQNewBundle:User',
            'property' => 'name',
            'empty_value' => 'Choose',
            'required' => true,
            'multiple' => true,
            'query_builder' => function (Options $options) {
                return function(EntityRepository $er) use ($options) {
                    return $er->createQueryBuilder('c')
                        ->orderBy('c.name', 'ASC');
                };
            },
        ));
    }

    public function getParent()
    {
        return 'entity';
    }

    public function getName()
    {
        return 'user';
    }
}

并在 service.yml 中注册一个类型：

# src/WebHQ/NewBundle/Resources/config/services.yml
#...
services:
    web_hq_new.form.type.user:
        class: WebHQ\NewBundle\Form\Type\UserType
        tags:
            - { name: form.type, alias: user }
#...

祝你好运！