无法以一对多关系从数据库中删除记录

Question

在Symfony 2.8项目中，我有一个与CompanyProductionUnits具有一对多关系的PersonDetail对象：

use Doctrine\ORM\Mapping as ORM,
    Doctrine\Common\Collections\ArrayCollection;
use Gedmo\Mapping\Annotation as Gedmo;

/**
 * AppBundle\Entity\GeneralData\PersonDetail
 *
 * @ORM\Table(name="person_detail")
 * @ORM\Entity(repositoryClass="PersonDetailRepository")
 * @ORM\HasLifecycleCallbacks
 */
class PersonDetail
{
    /**
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var ArrayCollection $companyProductionUnits
     *
     * @ORM\OneToMany(targetEntity="PersonDetailCompanyProductionUnit", mappedBy = "personDetail", cascade={"persist", "remove"})
     */
    private $companyProductionUnits;
}


<?php
namespace AppBundle\Entity\GeneralData;

use Doctrine\ORM\Mapping as ORM;
use Gedmo\Mapping\Annotation as Gedmo;

/**
 * AppBundle\Entity\GeneralData\PersonDetailCompanyProductionUnit
 *
 * @ORM\Table(name="person_detail_company_production_unit")
 * @ORM\Entity()
 * @ORM\HasLifecycleCallbacks
 */
class PersonDetailCompanyProductionUnit {
    /**
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var Company $company
     *
     * @ORM\ManyToOne(targetEntity="AppBundle\Entity\GeneralData\CompanyProductionUnit")
     * @ORM\JoinColumn(name="company_production_unit_id", referencedColumnName="id")
     */
    protected $companyProductionUnit;

    /**
     * @var PersonDetail $personDetail
     *
     * @ORM\ManyToOne(targetEntity="AppBundle\Entity\GeneralData\PersonDetail", inversedBy="companyProductionUnits")
     * @ORM\JoinColumn(name="person_detail_id", referencedColumnName="id")
     */
    protected $personDetail;
}    

当用户在表单中执行特定操作时，我想清空公司单位数组集合，将moveEmployee值设置为1.因此，当moveEmployee的值为1时，我从集合中删除公司生产单元对象。 但是记录不会从数据库中删除。 为什么？

在这里，您是表单处理程序：

<?php
namespace AppBundle\Form\Handler;

use AppBundle\Entity\GeneralData\PersonDetailCompanyProductionUnit;
use Symfony\Component\HttpFoundation\Request,
    Symfony\Component\Form\FormInterface,
    Symfony\Component\HttpFoundation\Session\Session;

use Doctrine\ORM\EntityManager;
use AppBundle\Entity\GeneralData\PersonDetail;

class CompanyProductionUnitEmployeeFormHandler {

    private $entityManager;
    private $session;

    public function __construct(
        EntityManager $entityManager,
        Session $session
    )
    {
        $this->entityManager = $entityManager;
        $this->session = $session;
    }

    public function handle(FormInterface $form, Request $request, $message)
    {
        if(!$request->isMethod('POST')) {
            return false;
        }

        $form->bind($request);

        if(!$form->isValid()) {
            return false;
        }

        $data = $request->request->get('company_production_unit_employee');

        $productionUnit = $this->entityManager
            ->getRepository('AppBundle\Entity\GeneralData\CompanyProductionUnit')
            ->find($data['productionUnit']);

        $personDetail = $this->entityManager
            ->getRepository('AppBundle\Entity\GeneralData\PersonDetail')
            ->find($data['personDetail']);

        if($data['moveEmployee'] == 1) {
            //first try
            foreach($personDetail->getCompanyProductionUnits() as $unit) {
                $this->entityManager->remove($unit);
            }

            //I tried also in the following way but without success
            //$personDetail->companyProductionUnits->clear();

        }

        $personDetailCompanyProductionUnit = new PersonDetailCompanyProductionUnit();
          $personDetailCompanyProductionUnit->setPersonDetail($personDetail);
              $personDetail->addCompanyProductionUnit($personDetailCompanyProductionUnit);

        $this->persist($personDetail, $message);

        return true;
    }

    public function persist(PersonDetail $personDetail, $message)
    {    
        $this->entityManager->persist($personDetail);
        $this->entityManager->flush();

        $this->session->getFlashBag()->add('success', $message);
    }
}

Answer 1

我快速浏览了一下，认为这可能是最有帮助的，从你的要求来看，我认为这份文件可能会帮助你解决这个问题。 与协会合作

Answer 2

我随便发现我的代码在我应用前面例子中尝试的两种策略时都能正常工作。 因此，解决方案是在表单处理程序中使用以下代码：

if($data['moveEmployee'] == 1) {
    foreach($personDetail->getCompanyProductionUnits() as $unit) {
        $this->entityManager->remove($unit);
    }

    $personDetail->companyProductionUnits->clear();
}