我正在尝试使用formtype来编辑我的一个对象。 formtype在创建新对象时完美运行,但是当我尝试将现有实体加载到表单中时,我得到以下异常:
必须管理传递给选择字段的“Proxies__CG __ \ App \ Entity \ Language”类型的实体。也许你忘了把它留在实体经理那里?
放入表单的对象是从数据库加载的,因此它已经100%持久存在。
以下是类型:
UNITTYPE
class UnitType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('unitTranslations', CollectionType::class, [
'entry_type' => UnitTranslationType::class,
'entry_options' => array('label' => false),
'allow_add' => true,
'allow_delete' => true,
'prototype' => true,
'by_reference' => false,
'delete_empty' => true,
'attr' => [
'class' => 'UnitTranslationSelector',
],
])
->add('save', SubmitType::class);
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => Unit::class
));
}
}
UnitTranslationType
class UnitTranslationType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('name', TextType::class, [
'label' => 'Unit',
'by_reference' => false
])
->add('language', EntityType::class, [
'class' => Language::class,
'choice_label' => 'name',
'placeholder' => 'Choose an option',
'by_reference' => false
]);
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => UnitTranslation::class,
));
}
}
和控制器:
public function createUnit(Request $request, EntityManagerInterface $entityManager)
{
$unit = new Unit();
$unit = $entityManager->getRepository(Unit::class)->find(2);
dump($unit);
$form = $this->createForm(UnitType::class, $unit);
$form->handleRequest($request);
if ($form->isSubmitted() && $form->isValid()) {
foreach ($unit->getUnitTranslations() as $translation) {
$translation->setUnit($unit);
}
$entityManager->persist($unit);
$entityManager->flush();
return $this->redirectToRoute("recipe_list");
}
return $this->render('createUnit.html.twig', array('form' => $form->createView()));
}