Forms Symfony2:未使用HandlerRequest（）绑定到表单的数据

我用嵌套集合创建了一个复杂的symfony表单。当我使用orm中的数据创建表单时，它可以工作：

$categories = $this->getDoctrine()->getRepository('xx:CategoryNutritionProgram')->findAll();
$form = $this->createForm(new CategoryCollectionFormType(), array('categories' => $categories));

类别集合表单类型：

class CategoryCollectionFormType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
    $builder->add('categories', 'collection', array(
        'type' => new CategoryFormType(),
        'cascade_validation' => true,
        'allow_add' => true,
        'by_reference' => false,
        'allow_delete' => true,
        'prototype_name' => '__i__'
    ));
    }

    /**
     * Returns the name of this type.
     *
     * @return string The name of this type
     */
    public function getName()
    {
    return 'simulator_category_collection';
    }
}

class CategoryFormType extends AbstractType
{

    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('name', 'hidden');

        $builder->add('nutritionPrograms', 'collection', array(
            'type' => new NutritionProgramFormType(),
            'cascade_validation' => true,
            'allow_add' => true,
            'by_reference' => false,
            'allow_delete' => true,
            'prototype_name' => '__j__'
        ));
    }

    /**
     * @param OptionsResolverInterface $resolver
     */
    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'xx\Entity\CategoryNutritionProgram'
        ));
    }

    /**
     * Returns the name of this type.
     *
     * @return string The name of this type
     */
    public function getName()
    {
        return 'simulator_category';
    }
}

类别FORM类型：

class CategoryCollectionFormType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
    $builder->add('categories', 'collection', array(
        'type' => new CategoryFormType(),
        'cascade_validation' => true,
        'allow_add' => true,
        'by_reference' => false,
        'allow_delete' => true,
        'prototype_name' => '__i__'
    ));
    }

    /**
     * Returns the name of this type.
     *
     * @return string The name of this type
     */
    public function getName()
    {
    return 'simulator_category_collection';
    }
}

class CategoryFormType extends AbstractType
{

    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('name', 'hidden');

        $builder->add('nutritionPrograms', 'collection', array(
            'type' => new NutritionProgramFormType(),
            'cascade_validation' => true,
            'allow_add' => true,
            'by_reference' => false,
            'allow_delete' => true,
            'prototype_name' => '__j__'
        ));
    }

    /**
     * @param OptionsResolverInterface $resolver
     */
    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'xx\Entity\CategoryNutritionProgram'
        ));
    }

    /**
     * Returns the name of this type.
     *
     * @return string The name of this type
     */
    public function getName()
    {
        return 'simulator_category';
    }
}

等等

但handleRequest（）函数不起作用，提交表单时$data为空。问题在哪里？我的代码看起来不错

$data = array('categories' => array());
$form = $this->createForm(new CategoryCollectionFormType(), $data);
$form->handleRequest($request);

以下是根据POST请求发送的数据：

simulator_category_collection[categories][0][name]:cat1
simulator_category_collection[categories][0][nutritionPrograms][0][name]:prog1
simulator_category_collection[categories][0][nutritionPrograms][0][applications][0][name]:app1
simulator_category_collection[categories][0][nutritionPrograms][0][applications][0][product]:1
simulator_category_collection[categories][0][nutritionPrograms][0][applications][0][dose]:5
simulator_category_collection[categories][0][nutritionPrograms][0][applications][0][unit]:5
simulator_category_collection[categories][0][nutritionPrograms][0][applications][1][name]:app2
simulator_category_collection[categories][0][nutritionPrograms][0][applications][1][product]:2
simulator_category_collection[categories][0][nutritionPrograms][0][applications][1][dose]:6
simulator_category_collection[categories][0][nutritionPrograms][0][applications][1][unit]:6
simulator_category_collection[categories][0][nutritionPrograms][1][name]:prog2
simulator_category_collection[categories][0][nutritionPrograms][1][applications][0][name]:app3
simulator_category_collection[categories][0][nutritionPrograms][1][applications][0][product]:3
simulator_category_collection[categories][0][nutritionPrograms][1][applications][0][dose]:7
simulator_category_collection[categories][0][nutritionPrograms][1][applications][0][unit]:7
simulator_category_collection[categories][1][name]:cat2
simulator_category_collection[categories][1][nutritionPrograms][0][name]:prog3
simulator_category_collection[_token]:xxx

---

Thx帮助解决，而不是像这样尝试从原始对象获取数据：

$data = array('categories' => array());
$form = $this->createForm(new CategoryCollectionFormType(), $data);
$form->handleRequest($request);
// here array $data is empty

---

我必须使用

$form->getData（）

，因为我的数组是按值传递的

我认为字段的名称必须是simulator\u category，而不是simulator\u category\u collection。我已经尝试过了，它没有任何改变。