Php Symfony 3-编辑表单-使用db数据填充字段（数组）

我需要一个带有3个动态选择框（choicetypes）的表单，表单提交后，这些框将保存为数据库中的序列化数组

我最终成功地让它工作了，但现在我正在努力在编辑项目时用数据库值填充下拉列表

项目实体

<?php

namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 * @ORM\Table(name="projects")
 */
class Projects
{
    /**
     * @ORM\Column(type="string", length=255)
     */
    protected $projectName;
    /**
     * @ORM\Column(type="array")
     */
    protected $frequency;
    /**
     * No database fields for these.
     * They are used just to populate the form fileds
     * and the serialized values are stored in the frequency field
     */
     protected $update;
     protected $every;
     protected $on;

    /*
     * Project Name
     */
    public function getProjectName()
    {
        return $this->projectName;
    }
    public function setProjectName($projectName)
    {
        $this->projectName = $projectName;
    }
    /*
     * Frequency
     */
    public function getFrequency()
    {
        return $this->frequency;
    }
    public function setFrequency($frequency)
    {
        $this->frequency = $frequency;
    }
    /*
     * Update
     */  
    public function getUpdate()
    {
        return $this->update;
    }
    public function setUpdate($update)
    {
        $this->update = $update;
    }
    /*
     * Every
     */  
    public function getEvery()
    {
        return $this->every;
    }
    public function setEvery($every)
    {
        $this->every = $every;
    }
    /*
     * On
     */  
    public function getOn()
    {
        return $this->on;
    }
    public function setOn($on)
    {
        $this->on = $on;
    }
}

---

我不确定这是否会对你有帮助，因为我没有足够的时间阅读你所有的帖子

首先（仅供参考），您可以在表单中使用3个字段（

update

、

every

和

on

）选项

'mapped'=>false

，并从实体中删除这3个字段（这是与实体的映射，而不是DB）

然后，您可以使用在控制器中访问它们

$editForm->get('update')->getData(); //or setData( $data );

当然，如果您愿意并且更方便的话，您可以保留这些属性。 但如果您确实保留了它们，请确保它们始终反映频率属性中的数据

接下来，我在编辑控制器中看到，在创建表单之前，您没有设置3个字段的值。 由于这些字段未映射（这次与数据库一起映射），因此在获取实体时，它们将为

null

（这是通过编辑控制器中的

paramConverter

完成的）。 因此，在将

$project

作为创建表单中的参数传递之前，必须对其进行设置（取消序列化或其他）

---

希望这能对你有所帮助

多谢各位。我已经按照您的建议在控制器中设置了值

<?php

namespace AppBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
use Symfony\Component\Form\FormEvent;
use Symfony\Component\Form\FormEvents;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\Form\FormView;
use AppBundle\Entity\Projects;

class ProjectsType extends AbstractType
{
    private function setUpdateChoice(Projects $project)
    {
        return $project->getFrequency()['update'];
    }

    /**
     * {@inheritdoc}
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('projectName', null, array());

        $builder->add('update', ChoiceType::class, array(
                'label'         => 'Update',
                'attr'          => array(
                    'class' => 'update_selector',
                ),
                'choices' => array(
                    'Daily' => 'Daily',
                    'Weekly' => 'Weekly',
                    'Monthly' => 'Monthly'
                ),
                'data' => $this->setUpdateChoice($builder->getData())
            )
        );

        $addFrequencyEveryField = function (FormInterface $form, $update_val) {
            $choices = array();
            switch ($update_val) {
                case 'Daily':
                    $choices = array('1' => '1', '2' => '2');
                    break;

                case 'Weekly':
                    $choices = array('Week' => 'Week', '2 Weeks' => '2 Weeks');
                    break;

                case 'Monthly':
                    $choices = array('Month' => 'Month', '2 Months' => '2 Months');
                    break;

                default:
                    $choices = array();
                    break;
            }
        };
  
        $builder->addEventListener(
            FormEvents::PRE_SET_DATA,
            function (FormEvent $event) use ($addFrequencyEveryField) {
                $update = $event->getData()->getUpdate();
                $update_val = $update ? $update->getUpdate() : null;
                $addFrequencyEveryField($event->getForm(), $update_val);
            }
        );
        $builder->addEventListener(
            FormEvents::PRE_SUBMIT,
            function (FormEvent $event) use ($addFrequencyEveryField) {
                $data = $event->getData();
                $update_val = array_key_exists('update', $data) ? $data['update'] : null;
                $addFrequencyEveryField($event->getForm(), $update_val);
            }
        );

        $addFrequencyOnField = function (FormInterface $form, $every_val) {
            $choicesOn = array();
            switch ($every_val) {
                case 'Week':
                    $choicesOn = array(
                        'Monday' => 'Monday',
                        'Tuesday' => 'Tuesday',
                        'Wednesday' => 'Wednesday',
                        'Thursday' => 'Thursday',
                        'Friday' => 'Friday',
                        'Saturday' => 'Saturday',
                        'Sunday' => 'Sunday',
                    );
                break;

                case 'Month':
                    $choicesOn = array(
                        '1' => '1',
                        '2' => '2',
                        '3' => '3',
                        '4' => '4',
                        '5' => '5',
                        '6' => '6',
                        '7' => '7',
                    );
                break;

                default:
                    $choicesOn = array();
                break;
            }

            $form->add('on', ChoiceType::class, array(
                'choices'     => $choicesOn,
            ));

        };
        $builder->addEventListener(
            FormEvents::PRE_SET_DATA,
            function (FormEvent $event) use ($addFrequencyOnField) {
                $every = $event->getData()->getEvery();
                $every_val = $every ? $every->getEvery() : null;
                $addFrequencyOnField($event->getForm(), $every_val);
            }
        );
        $builder->addEventListener(
            FormEvents::PRE_SUBMIT,
            function (FormEvent $event) use ($addFrequencyOnField) {
                $data = $event->getData();
                $every_val = array_key_exists('every', $data) ? $data['every'] : null;
                $addFrequencyOnField($event->getForm(), $every_val);
            }
        );
    }
    /**
     * {@inheritdoc}
     */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'AppBundle\Entity\Projects'
        ));
    }

    /**
     * {@inheritdoc}
     */
    public function getBlockPrefix()
    {
        return 'appbundle_projects';
    }
}

{% extends 'base.html.twig' %}
{% block body %}
    {% block content %}
      <h1>Edit Project</h1>

      {{ form_start(edit_form) }}
          {{ form_widget(edit_form) }}
          <input type="submit" value="Edit" />
      {{ form_end(edit_form) }}
    {% endblock content %}


    {% block javascripts %}
        <script>
          var $update =       $('#appbundle_projects_update');
          var $every =        $('#appbundle_projects_every');
          var $on_selector =  $('#appbundle_projects_on');

          // When update gets selected ...
          $update.change(function() {
            $every.html('');
            // ... retrieve the corresponding form.
            var $form = $(this).closest('form');
            // Simulate form data, but only include the selected update value.
            var data = {};
            data[$update.attr('name')] = $update.val();
            // Submit data via AJAX to the form's action path.
            $.ajax({
              url : $form.attr('action'),
              type: $form.attr('method'),
              data : data,
              success: function(html) {
                var options = $(html).find('#appbundle_projects_every option');
                for (var i=0, total = options.length; i < total; i++) {
                    $every.append(options[i]);
                }
              }
            });
          });
          // // When every gets selected ...
          $every.change(function() {
            $on_selector.html('');
            // ... retrieve the corresponding form.
            var $form = $(this).closest('form');
            // Simulate form data, but only include the selected every value.
            var data = {};
            data[$every.attr('name')] = $every.val();
            // Submit data via AJAX to the form's action path.
            $.ajax({
              url : $form.attr('action'),
              type: $form.attr('method'),
              data : data,
              success: function(html) {
                  var options = $(html).find('#appbundle_projects_on option');
                  for (var i=0, total = options.length; i < total; i++) {
                      $on_selector.append(options[i]);
                  }
              }
            });
          });
        </script>
    {% endblock javascripts %}
{% endblock %}

  public function editAction(Request $request, Projects $project)
  {
      $project->setUpdate($project->getFrequency()['update']);
      $project->setEvery($project->getFrequency()['every']);
      $project->setOn($project->getFrequency()['on']);

      $editForm = $this->createForm('AppBundle\Form\ProjectsType', $project);
      $editForm->handleRequest($request);

      if ($editForm->isSubmitted() && $editForm->isValid()) {
          $frequency = array(
              "update" => $project->getUpdate(),
              "every" => $project->getEvery(),
              "on" => $project->getOn()
          );


          $project->setFrequency($frequency);
          $this->getDoctrine()->getManager()->flush();

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

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

$editForm->get('update')->getData(); //or setData( $data );