forms - symfony 2 表单类型集合，为模型中的每个新属性更改标签

Question

我有 4 个实体作为 Product、ProductFeatures、Goods、GoodsFeaturesValue 以及它们之间的关系。我为 Product 添加了一些 Features 然后我想用静态字段 Goods + 一些来自 Product 的新 Features 创建表单对于这个 Goods。GoodsFeaturesValue 中保存的每个 Goods 的值。

如何以“symfony 方式”构建此表单？

更新

我将集合用于其他 Features 并且这个工作正常，但是我如何为每个值设置 ProductFeatures 关系的标签？我可以在渲染 templemate 时执行此操作，但这很糟糕 :)？

//GoodsFormType class
public function buildForm(FormBuilder $builder, array $options)
{
    $builder
            ->add('name')
            //other property...
            ->add('values', 'collection', array(
                'required' => true,
                'type' => new GoodsFeaturesValueFormType(),
                'allow_add' => false,
                'allow_delete' => false,
                'by_reference' => false,
            ))
    ;
}

//GoodsFeaturesValueFormType
    public function buildForm(FormBuilder $builder, array $options)
{
    $builder
            ->add('value', 'text')
    ;
}
  //controller
  public function saveAction($id)
{
    $em = $this->getDoctrine()->getEntityManager();
    $product = $em->getRepository('ShopCoreBundle:Product')->find($id);

    if (!$product)
        throw $this->createNotFoundException(sprintf('Product with id %s not found', $id));

    $features = $em->getRepository('ShopCoreBundle:ProductFeatures')->findByProduct($id);
    $goods = new Goods();
    $goods->setProduct($product);

    foreach ($features as $feature) {
        $entity = new GoodsFeaturesValue();
        $entity->setFeatures($feature);
        $entity->setGoods($goods);
        $entity->setProduct($product);
        $goods->addGoodsFeaturesValue($entity);
    }

    $request = $this->getRequest();

    $form = $this->createForm(new GoodsFormType(), $goods);
    $form->bindRequest($request);

    if ($form->isValid()) {
        $em->persist($goods);
        $em->flush();
        return $this->redirect($this->generateUrl('core_product_index'));
    }



    return array(
        'form' => $form->createView(),
        'goods' => $goods,
        'product' => $product,
        'features' => $features,
    );
}

Answer 1

这正是我想要的动态属性。您可以使用 FormEvent 和 EventSubscriber 作为动态生成表单来执行此操作。 http://symfony.com/doc/master/cookbook/form/dynamic_form_generation.html

因此，在 GoodsFeaturesValueFormType 类中，您创建新的 EventSubscriber 并使用 preSetData 设置带有数据的标签。

更新:Symfony 默认的ResizeFormListener 不会将值传递给它，因此，这将是一个错误。为了支持这一点，修改 ResizeFormListener(使用哪个集合)如下

[before]
    91         // Then add all rows again in the correct order                                                            
    92         foreach ($data as $name => $value) {                                                                       
    93             $form->add($this->factory->createNamed($this->type, $name, null, array_replace(array(                  
    94                 'property_path' => '['.$name.']',                                                                  
    95             ), $this->options)));
    96         }   

---

[modified]
    91         // Then add all rows again in the correct order                                                            
    92         foreach ($data as $name => $value) {                                                                       
    93             $form->add($this->factory->createNamed($this->type, $name, $value, array_replace(array(                  
    94                 'property_path' => '['.$name.']',                                                                  
    95             ), $this->options)));
    96         }