Question

如何在Symfony的EntityType上设置默认选项，以便在绑定的表单对象没有值时使用？

我已尝试过以下内容（this answer中建议），但data选项甚至会覆盖绑定值。

class FooEntityType extends AbstractType
{
    public function configureOptions(OptionsResolver $resolver)
    {
        ...
        $resolver->setDefaults([
            'choices' => $fooEntities,
            'class' => 'FooBundle:FooEntity',
            'choice_label' => 'name',
            'expanded' => true,
            'multiple' => false,
            'data' => $fooEntities[0],
        ]);
    }

    public function getParent()
    {
        return EntityType::class;
    }
}

Answer 1

创建表单后，您应该将实体添加到该方法（假设您在控制器中）：

# src/Controller/MainController.php
$entity = new Entity();
$entity->setCertainValue('choice-value');

$form = $this->createForm(EntityType::class, $entity);
$form->handleRequest($request);

if ($form->isValid()) {
    // Do something nice with the entity, data is filled here
}

Answer 2

您应该将此代码移动到类型

试试这个

$entity = $options['data']; // this will be your entity

// form builder
$builder->add('entityProperty', EntityType::class, [
    'choices' => $fooEntities,
    'class' => 'FooBundle:FooEntity',
    'choice_label' => 'name',
    'expanded' => true,
    'multiple' => false,
    'data' => $entity->getEntityProperty() ? $entity->getEntityProperty() : $fooEntities[0]
]);

此外，您可以通过表单事件解决此变通方法，但它不值得

在Symfony的EntityType上设置默认选项

2 个答案: