多对多关联错误

Question

我正在尝试将新的管理员从管理员添加到我的应用程序，但我遇到了这个错误：

The property "nurseries" in class "VS\CrmBundle\Entity\Staff" can be defined with the methods "addNurseries()", "removeNurseries()" but the new value must be an array or an instance of \Traversable, "VS\CrmBundle\Entity\Nursery" given.

我在 Nursery 和 Staff 类之间有一个 ManyToMany 关联：

class Staff extends User
{
    /**
     * @var int
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * @var ArrayCollection
     *
     * @ORM\ManyToMany(targetEntity="Nursery", inversedBy="staff", cascade={"persist"})
     * @ORM\JoinTable(name="nursery_staff",
     *     joinColumns={@ORM\JoinColumn(name="staff_id", referencedColumnName="id")},
     *     inverseJoinColumns={@ORM\JoinColumn(name="nursery_id", referencedColumnName="id")}
     *  )
     */
    private $nurseries;

    /**
     * Staff constructor.
     */
    public function __construct()
    {
        parent::__construct();
        $this->nurseries = new ArrayCollection();
    }
    /**
     * @param Nursery $nursery
     */
    public function addNurseries(Nursery $nursery)
    {
        $nursery->addStaff($this);
        $this->nurseries[] = $nursery;
    }

    /**
     * @param Nursery $nursery
     */
    public function removeNurseries(Nursery $nursery)
    {
        $this->nurseries->removeElement($nursery);
    }

    /**
     * @return ArrayCollection
     */
    public function getNurseries()
    {
        return $this->nurseries;
    }

还有：

class Nursery
{
    /**
     * @var int
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;
    /**
     * @var ArrayCollection
     *
     * @ORM\ManyToMany(targetEntity="Staff", mappedBy="nurseries", cascade={"persist"})
     * @ORM\JoinTable(name="nursery_staff")
     */
    private $staff;
    /**
     * Nursery constructor.
     */
    public function __construct()
    {
        $this->staff = new ArrayCollection();
        $this->schedule = new ArrayCollection();
        $this->createdAt = new \DateTime();
        $this->contacts = new ArrayCollection();
        $this->registerRecord = new ArrayCollection();
    }
    /**
     * Add staff
     *
     * @param \VS\CrmBundle\Entity\Staff $staff
     *
     * @return Nursery
     */
    public function addStaff(\VS\CrmBundle\Entity\Staff $staff)
    {
        $this->staff[] = $staff;

        return $this;
    }

    /**
     * Remove staff
     *
     * @param \VS\CrmBundle\Entity\Staff $staff
     */
    public function removeStaff(\VS\CrmBundle\Entity\Staff $staff)
    {
        $this->staff->removeElement($staff);
    }

    /**
     * Get staff
     *
     * @return \Doctrine\Common\Collections\Collection
     */
    public function getStaff()
    {
        return $this->staff;
    }

然后我有这个控制器：

   public function addAction(Request $request)
    {
        //Create the forms
        $manager = new Staff();
        $managerForm = $this->get('form.factory')->create(StaffFromAdminType::class, $manager);

        $managerForm->handleRequest($request);
        if($managerForm->isSubmitted() && $managerForm->isValid())
        {
            $manager->setStaffRole('MANAGER');

            $em = $this->getDoctrine()->getManager();
            $em->persist($manager);
            $em->flush();

            $this->addFlash('success', 'The Manager has been successfully added.');

            return $this->redirectToRoute('vs_crm_admin_dashboard');
        }

        return $this->render("VSCrmBundle:Admin/Manager:add-manager.html.twig", array(
            'manager_form' => $managerForm->createView()
        ));
    }

最后这是我的表格：

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        ->add('firstName')
        ->add('lastName')
        ->add('email')
        ->add('addresses', CollectionType::class, array(
            'entry_type' =>  AddressType::class,
            'allow_add' => true
        ))
        /*
        ->add('medias', CollectionType::class, array(
            'entry_type' => MediaType::class,
            'allow_add' => true
        ))*/
        ->add('staffRole')
        ->add('nurseries', EntityType::class, array(
            'class' => 'VSCrmBundle:Nursery',
        ));
}

还有这个日志：

[1] Symfony\Component\PropertyAccess\Exception\NoSuchPropertyException: The property "nurseries" in class "VS\CrmBundle\Entity\Staff" can be defined with the methods "addNurseries()", "removeNurseries()" but the new value must be an array or an instance of \Traversable, "VS\CrmBundle\Entity\Nursery" given.
    at n/a
        in C:\wamp64\www\app\vendor\symfony\symfony\src\Symfony\Component\PropertyAccess\PropertyAccessor.php line 614

    at Symfony\Component\PropertyAccess\PropertyAccessor->writeProperty(array(object(Staff), object(Staff)), 'nurseries', object(Nursery))
        in C:\wamp64\www\app\vendor\symfony\symfony\src\Symfony\Component\PropertyAccess\PropertyAccessor.php line 202

    at Symfony\Component\PropertyAccess\PropertyAccessor->setValue(object(Staff), object(PropertyPath), object(Nursery))
        in C:\wamp64\www\app\vendor\symfony\symfony\src\Symfony\Component\Form\Extension\Core\DataMapper\PropertyPathMapper.php line 93

    at Symfony\Component\Form\Extension\Core\DataMapper\PropertyPathMapper->mapFormsToData(object(RecursiveIteratorIterator), object(Staff))
        in C:\wamp64\www\app\vendor\symfony\symfony\src\Symfony\Component\Form\Form.php line 618

    at Symfony\Component\Form\Form->submit(array('nurseries' => '1', 'firstName' => 'Jacques', 'lastName' => 'Dupont', 'email' => 'viktor@test.be', '_token' => 'tULa-SoBQArpx34h9d5gNOi93t2gXw_ZSlsdc52Fvus'), true)
        in C:\wamp64\www\app\vendor\symfony\symfony\src\Symfony\Component\Form\Extension\HttpFoundation\HttpFoundationRequestHandler.php line 113

    at Symfony\Component\Form\Extension\HttpFoundation\HttpFoundationRequestHandler->handleRequest(object(Form), object(Request))
        in C:\wamp64\www\app\vendor\symfony\symfony\src\Symfony\Component\Form\Form.php line 488

    at Symfony\Component\Form\Form->handleRequest(object(Request))
        in C:\wamp64\www\app\src\VS\CrmBundle\Controller\ManagerController.php line 36

    at VS\CrmBundle\Controller\ManagerController->addAction(object(Request))
        in  line 

    at call_user_func_array(array(object(ManagerController), 'addAction'), array(object(Request)))
        in C:\wamp64\www\app\vendor\symfony\symfony\src\Symfony\Component\HttpKernel\HttpKernel.php line 153

    at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Request), '1')
        in C:\wamp64\www\app\vendor\symfony\symfony\src\Symfony\Component\HttpKernel\HttpKernel.php line 68

    at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), '1', true)
        in C:\wamp64\www\app\vendor\symfony\symfony\src\Symfony\Component\HttpKernel\Kernel.php line 169

    at Symfony\Component\HttpKernel\Kernel->handle(object(Request))
        in C:\wamp64\www\app\web\app_dev.php line 28

所以我只想让管理员在所有已注册托儿所的列表中选择合适的托儿所，为新经理添加一些数据，并使用新经理和现有托儿所之间的链接保存经理。

Answer 1

您正在表单中生成对象nursery 的元素。相反，您需要传递nursery 的数组。在FormType 中添加'multiple' => true 后尝试。

表单类型

->add('nurseries', EntityType::class, array(
     'multiple' => true,     
     'class' => 'VSCrmBundle:Nursery'
))

注意：'multiple' => true 将创建数组类型控件而不是对象。