Symfony2& Doctrine2:removeElement不起作用

时间:2012-05-05 19:58:30

标签: php symfony doctrine-orm

我在Symfony2和doctrine中有一个小项目,我正在尝试更新2个相关实体:

会员&汽车

$carMembers = $car->getMembers();
echo count($carMembers); // --> show 2
echo get_class(carMembers[0]); // --> show MyCars\WSBundle\Entity\Member
$car->removeMember($member);
$em->persist($car);
$em->flush();

$carMembers= $car->getMembers();
echo count($carMembers); // --> show 1
echo get_class(carMembers[0]); // --> show MyCars\WSBundle\CarsController !!!

有我的实体:

汽车

/**
 * @ORM\ManyToMany(targetEntity="Member", mappedBy="cars")
 */
private $members;

/**
 * Remove Member
 *
 * @param MyCars\WSBundle\Entity\Member $member
 */
public function removeMember(\MyCars\WSBundle\Entity\Member $member)
{
    $this->members->removeElement($member);
    $member->removeCar($this);
}

会员

/**
 * @ORM\ManyToMany(targetEntity="Car", cascade={"persist"})
 * @ORM\JoinTable(name="cars_membres",
 * joinColumns={@ORM\JoinColumn(name="member_id", referencedColumnName="member_id")},
 * inverseJoinColumns={@ORM\JoinColumn(name="car_id", referencedColumnName="car_id")}
 * )
 */
private $cars;

3 个答案:

答案 0 :(得分:10)

我认为您正在寻找的是orphanRemoval关系选项。

@ORM\ManyToMany(targetEntity="Car", cascade={"persist"}, orphanRemoval=true)

因此,当您从集合中删除项目并刷新实体管理器时,它将从数据库中删除关系记录...

答案 1 :(得分:1)

如果要使用函数添加包含 removeElement

<?php

// ...

use Doctrine\Common\Collections\ArrayCollection;

class Car
{
    /**
     * @MongoDB\Id
     */
    protected $members;

    /**
     * General constructor
     */
    public function __construct()
    {
        $this->members = new ArrayCollection();
    }

    /**
     * @param Member $member
     * @return $this
     */
    public function addMember(Member $member)
    {
        if (!$this->hasMember($member)) {
            $this->members->add($member);
        }

        return $this;
    }

    /**
     * @param Member $member
     * @return $this
     */
    public function removeMember(Member $member)
    {
        if ($this->hasMember($member)) {
            $this->members->removeElement($member);
        }

        return $this;
    }

    /**
     * @return mixed
     */
    public function getMembers()
    {
        return $this->tags;
    }

    /**
     * @param Member $member
     * @return mixed
     */
    public function hasTag(Member $member)
    {
        return $this->members->contains($member);
    }
}

答案 2 :(得分:0)

你使用哪个系列?你使用\ Doctrine \ ArrayCollecion吗? 您确定要删除相同的成员对象实例吗? removeElement()方法只有在它是同一个实例时才从集合中删除它。

这是方法(注意array_search方法中的最后一个参数(true):

public function removeElement($element)
{
  $key = array_search($element, $this->_elements, true);

  if ($key !== false) {
    unset($this->_elements[$key]);
    return true;
  }

  return false;
}