php - symfony3 : create form for entity that has a column with many to one relationship

Question

我有一个“任务”表，它引用了一个“Estados”表，该表具有从列 Tasks.taskestado 到 Estados.estado 的外键。

这是任务的相关 XML 映射:

<entity name="AppBundle\Entity\Tasks" table="TASKS" repository-class="AppBundle\Repository\TasksRepository">
<id name="taskid" type="bigint" column="TaskID">
  <generator strategy="IDENTITY"/>
</id>
...
<many-to-one field="taskestado" target-entity="Estados" fetch="LAZY">
  <join-columns>
    <join-column name="TaskEstado" referenced-column-name="Estado"/>
  </join-columns>
</many-to-one>
...

对于 Estados:

<entity name="AppBundle\Entity\Estados" table="ESTADOS">
<id name="estado" type="string" column="Estado" length="15">
  <generator strategy="IDENTITY"/>
</id>
<field name="estadodescricao" type="string" column="EstadoDescricao" length="50" nullable="true">
  <options>
    <option name="fixed"/>
  </options>
</field>
...

鉴于此，我正在尝试执行一个操作 (novaAction()) 来创建任务。这是 Controller 代码:

public function novaAction(Request $request)
{
    $task = new Tasks();
    $em = $this->getDoctrine()->getManager();

    dump($task);
    #$task->setTaskEstado(new Estados());
    $form = $this->createForm(TasksType::class, $task);
    $form->handleRequest($request);

    if ($form->isSubmitted()) {
        if ($form->isValid()) {
            // Criar a tarefa na BD
            $em->persist($form->getData());
            $em->flush();
            $this->addFlash('notice', 'app.nova_tarefa.mensagem_sucesso');

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

        $this->addFlash('error', 'app.nova_tarefa.mensagem_erro');
    }

以及相关的TasksType代码:

class TasksType extends AbstractType
{

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        ->add('taskid', HiddenType::class)
        ...
        #->add('taskestado')
        ->add('taskestado', EntityType::class, [ 'class' => 'AppBundle:Estados' ])
        ...
}

/**
 * @param OptionsResolver $resolver
 */
public function configureOptions(OptionsResolver $resolver)
{
    $resolver->setDefaults(array(
        'data_class' => 'AppBundle\Entity\Tasks',
        #'empty_data' => function (\Symfony\Component\Form\FormInterface $form) {
        #    #return new Tasks($form->get('tasks')->getData());
        #    return new Tasks();
        #},
    ));
}
}

“empty_data”选项试图在不向其传递任务实例的情况下创建表单。此外，当我使用注释代码添加 taskestado 时，我得到了相同的结果，我。即，没有参数。

这是相关的任务实体:

namespace AppBundle\Entity;

use Doctrine\Common\Collections\ArrayCollection;

/**
 * Tasks
 */
class Tasks
{
    /**
     * @var integer
     */
    protected $taskid;

    /**
     * @var \AppBundle\Entity\Estados
     */
    protected $taskestado;

    ...

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

    /**
     * Set taskestado
     *
     * @param \AppBundle\Entity\Estados $taskestado
     *
     * @return Tasks
     */
    public function setTaskestado(\AppBundle\Entity\Estados $taskestado = null)
    {
        $this->taskestado = $taskestado;

        return $this;
    }

    /**
     * Get taskestado
     *
     * @return \AppBundle\Entity\Estados
     */
    public function getTaskestado()
    {
        return $this->taskestado;
    }

    ...
}

当我打开页面时，出现以下错误:

Entities passed to the choice field must be managed. Maybe persist them in the entity manager?

我还生成了 CRUD (bin/console doctrine:generate:crud --filter=Tasks)，这样我就可以检查它是如何完成的，但代码也很相似作为结果(在修复了某些日期时间列的 TasksType 中的一些问题之后)。

我做错了什么？

Answer 1

如错误所述，您需要在任务映射中设置 cascade = persist。例如:

<many-to-one field="taskestado" target-entity="Estados" fetch="LAZY">
  <cascade>
     <cascade-persist/>
  </cascade>
  <join-columns>
    <join-column name="TaskEstado" referenced-column-name="Estado"/>
  </join-columns>
</many-to-one>

也不是做 $em->persist($form->getData());使用 $em->persist($task);

看看是否可行...