symfony2-编辑表单时动态生成的表单不工作

Question

基于文档:http://symfony.com/doc/2.8/form/dynamic_form_modific.html#form-events-submitted-data

我准备了动态生成表单。所有的工作都正常，但只有当我使用form添加新数据（/new）时，当我使用相同的form编辑现有数据时--不工作

1. “约会”的简单形式。它应该是这样工作的：用户选择客户机，然后第二个“选择”是填充正确的数据-取决于每个客户机从第一个选择。这可以工作，但只有当我尝试添加新约会。当我尝试编辑编号时

class AppointmentType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('name')
            ->add('client', EntityType::class, array(
                'class'       => 'SystemAdminBundle:Client',
                'placeholder' => '',
            ));
        $formModifier = function(\Symfony\Component\Form\FormInterface $form, Client $client) 
        {
            $diseases = array();
            if($client !== null) {
                $diseases = $client->getDiseases();
            }
            $form->add('disease', EntityType::class, array(
                    'class'       => 'SystemAdminBundle:Disease',
                    'placeholder' => '',
                    'choices'     => $diseases,
                ));
        };
        $builder->addEventListener(
            FormEvents::PRE_SET_DATA,
            function (FormEvent $event) use ($formModifier) {

                $data = $event->getData();

                $formModifier($event->getForm(), $data->getClient());

            }
        );

        $builder->get('client')->addEventListener(
            FormEvents::POST_SUBMIT,
            function (FormEvent $event) use ($formModifier) {

                $client = $event->getForm()->getData();

                $formModifier($event->getForm()->getParent(), $client);
            }
        );

    }


    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'System\AdminBundle\Entity\Appointment'
        ));
    }
}

    public function newAction(Request $request)
    {
        $appointment = new Appointment();
        $form = $this->createForm(AppointmentType::class, $appointment);
        $form->handleRequest($request);

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


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

            if(array_key_exists('name', $data)) {

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

                return $this->redirectToRoute('appointment_show', array('id' => $appointment->getId()));

            }

        }

        return $this->render('appointment/new.html.twig', array(
            'appointment' => $appointment,
            'form' => $form->createView(),
        ));

    }
    public function editAction(Request $request, Appointment $appointment)
    {
        $deleteForm = $this->createDeleteForm($appointment);
        $appointment = new Appointment();
        $editForm = $this->createForm('System\AdminBundle\Form\AppointmentType', $appointment);
        $editForm->handleRequest($request);

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

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

            if(array_key_exists('name', $data)) {

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

                return $this->redirectToRoute('appointment_show', array('id' => $appointment->getId()));

            }

            return $this->redirectToRoute('appointment_edit', array('id' => $appointment->getId()));
        }

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

    {% block content %}

    {{ form_start(form) }}
        {{ form_widget(form) }}
        
    {{ form_end(form) }}

    
    window.onload = function() {

    var $sport = $('#appointment_client');

    $sport.change(function() {

      var $form = $(this).closest('form');

      var data = {};
      data[$sport.attr('name')] = $sport.val();
      data['appointment[_token]'] = $('#appointment__token').val();

      $.ajax({
        url : $form.attr('action'),
        type: $form.attr('method'),
        data : data,
        success: function(html) {

          $('#appointment_disease').replaceWith(

            $(html).find('#appointment_disease')
          );

        }
      });
    });

    };
    
    {% endblock %}
    

    {% block content %}
    {{ form_start(edit_form) }}
        {{ form_widget(edit_form) }}
        
    {{ form_end(edit_form) }}

    
    window.onload = function() {


    var $sport = $('#appointment_client');

    $sport.change(function() {

      var $form = $(this).closest('form');

      var data = {};
      data[$sport.attr('name')] = $sport.val();
      data['appointment[_token]'] = $('#appointment__token').val();

      $.ajax({
        url : $form.attr('action'),
        type: $form.attr('method'),
        data : data,
        success: function(html) {

        $('#appointment_disease').replaceWith(

        $(html).find('#appointment_disease')
    );   
    }
    });
    });

    };
    
    {% endblock %}

Answer 1

您可以在EditAction中创建新约会，然后将其持久化。您应该使用函数参数中的一个，处理请求并刷新，因为您的对象已经持久化了。

因此删除这些行：

$appointment = new Appointment();
// ...
$em->persist($appointment);