Sonata Admin从查询字符串编译表单字段

我通过使用 字段标记为 'mapped' => false 在我的表单生成器上:

protected function configureFormFields(FormMapper $formMapper)
{
    $request = $this->getRequest();
    $dateParameter = $request->query->get('date');
    $date = null;

    if ($dateParameter) {
        $date = \DateTime::createFromFormat('!Y-m-d', $dateParameter);
    }

    if (!$date) {
        $formMapper
            ->add('date', DatePickerType::class)
            ->add('calendarDate', HiddenType::class, array(
                'data' => null,
                'mapped' => false,
            ))
        ;
    } else {
        $formMapper
            ->add('date', DatePickerType::class, array(
                'data' => $date,
                'disabled' => true,
            ))
            ->add('calendarDate', HiddenType::class, array(
                'data' => $date->format('Y-m-d'),
                'mapped' => false,
            ))
        ;
    }

    $formMapper
        // other fields
        ->add('other_field', ModelType::class)
    ;
}

public function prePersist($myEntity)
{
    $this->preUpdate($myEntity);
}

public function preUpdate($myEntity)
{
    $dateString = $this->getForm()->get('calendarDate')->getData();
    if ($dateString) {
        $date = \DateTime::createFromFormat('!Y-m-d', $dateString);
        if ($date) {
            $myEntity->setDate($date);
        }
    }
}

date

http://localhost:8000/admin/app/event/24/edit?date=2017-07-01

在HTML中,我有以下内容:

<input type="hidden" id="s59664a9ea44ce_calendarDate" name="s59664a9ea44ce[calendarDate]" class=" form-control" value="2017-07-01" />

P、 当有人给a-1时,最好解释一下为什么。。。