将使用Symfony3构建的EntityType下拉字段默认为以前的值

Question

我正努力为这个问题找到正确的解决办法。

我有一个带有下拉列表的表单，我希望通过使用EntityType字段调用DB来动态生成该表单。但是，在编辑时，一切都很完美，但我无法使它默认为以前的值。表单(所有文本)中的所有其他字段默认为前一个值，如果我使用ChoiceType手动构建字段，则默认设置为预期。

我试过使用“data”选项手动设置它，但是它没有工作。除了将其构建为ChoiceType并通过控制器发送数据之外，还有其他需要尝试的地方吗？

这是我的表单类TerminologyType.php

<?php

namespace AppBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Component\Form\FormEvent;
use Symfony\Component\Form\FormEvents;
use Symfony\Bridge\Doctrine\Form\Type\EntityType;
use Doctrine\ORM\EntityRepository;

class TerminologyType extends AbstractType
{
    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {

        // Event listener added to prevent users from editing the unique
        // code after it has been created.
        $builder->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) {
            $terminology = $event->getData();
            $form = $event->getForm();

            // check if the Terminology object is "new"
            // This should be considered a new "Terminology" and user must enter a code
            if (!$terminology || null === $terminology->getCode()) {
                $form->add('code');
            }

        });
        $builder
            ->add('name')
            ->add('version')
            ->add('description')
            ->add('status', EntityType::class, [
              'class' => 'AppBundle:CodeSet',
              'query_builder' => function (EntityRepository $er) {
                return $er->createQueryBuilder('c')
                ->where('c.terminologyCode = :code')
                ->setParameter('code', 'entity_status')
                ->orderBy('c.name', 'ASC');
                },
              'choice_label' => 'name',
              'choice_value' => 'code',
            ]);

}
    /**
     * @param OptionsResolver $resolver
     */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'AppBundle\Entity\Terminology',
        ));
    }
}

控制器

<?php

namespace AppBundle\Controller;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Method;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use AppBundle\Entity\Terminology;
use AppBundle\Form\TerminologyType;

/**
 * Terminology controller.
 *
 * @Route("/admin/terminology")
 */
class TerminologyController extends Controller
{
    /**
     * Lists all Terminology entities.
     *
     * @Route("/", name="terminology_index")
     * @Method("GET")
     */
....



/**
 * Displays a form to edit an existing Terminology entity.
 *
 * @Route("/{code}/edit", name="terminology_edit")
 * @Method({"GET", "POST"})
 */
public function editAction(Request $request, Terminology $terminology)
{
    $deleteForm = $this->createDeleteForm($terminology);
    $editForm = $this->createForm('AppBundle\Form\TerminologyType', $terminology);

    $editForm->handleRequest($request);
    $em = $this->getDoctrine()->getManager();

    if ($editForm->isSubmitted() && $editForm->isValid()) {

        $em->persist($terminology);
        $em->flush();

        return $this->redirectToRoute('terminology_show', array('code' => $terminology->getCode()));
    }

    return $this->render('terminology/edit.html.twig', array(
        'terminology' => $terminology,
        'edit_form' => $editForm->createView(),
        'delete_form' => $deleteForm->createView(),
    ));
}

实体

<?php

// src/AppBundle/Entity/Terminology.php
namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Gedmo\Mapping\Annotation as Gedmo;
use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;

/**
  * @ORM\Entity
  * @Gedmo\Loggable
  * @ORM\Table(name="ts_terminology")
  * @Gedmo\SoftDeleteable(fieldName="dateDeleted", timeAware=false)
  * @UniqueEntity("code")
  *
  */

class Terminology extends TerminologyServices
{

  /**
     * @ORM\Column(type="string", length=75)
     * @ORM\OneToMany(targetEntity="CodeSet", mappedBy="terminologyCode")
     * @ORM\Id
   */
     protected $code;

    /**
     * @ORM\Column(type="string", length=75, nullable=true)
     * @ORM\OneToOne(targetEntity="CodeSet")
   * @ORM\JoinColumn(name="status", referencedColumnName="code")
     * @Gedmo\Versioned
   */
     protected $status;

Answer 1

我找到了这个问题。在状态的实体定义中，我在注释中定义了列类型、长度等。@ORM\列(type=“string”，length=75，nullable=true)

通过删除这个值，它开始默认到最后一个输入的值(但是这随后破坏了其他东西)。我认为这与EntityType所期望的对象有关，但实体类型被定义为字符串，并且只提供该类型(这解释了为什么ChoiceType选项有效)。