如何在symfony2中设置采集类型的字段值

Question

//--form timesheettype-它不是实体类

class TimeSheetType extends AbstractType {

        public function buildForm(FormBuilder $builder, array $options) {
            $builder->
                    add('dailyTimeSheet', 'collection', array('type' => new DailyType(), 'allow_add' => true, 'allow_delete' => true, 'prototype' => true,))
                    ->add('comment','textarea');
        }

         public function getName() {
            return 'TimeSheetDaily';
        }

    }

//- DailyType --存在此类型的实体

class DailyType extends AbstractType {


    public function buildForm(FormBuilder $builder, array $options) {


        $builder->add('project','entity',array('class'=> 'Parabola\EntityBundle\Entity\Project','property'=>'name'))
               ->add('projectTask', 'entity', array('class'=> 'Parabola\EntityBundle\Entity\ProjectTask','property'=>'name'))
                ->add('hours', 'text');

    }
    public function getDefaultOptions(array $options)
    {
        return array('data_class' => 'Parabola\EntityBundle\Entity\TimeSheetDaily');
    }

 public function getName() {
    return 'DailySheet';
}

//--控制器--

$repository = $this->getDoctrine()
                ->getRepository('ParabolaEntityBundle:TimeSheetDaily')->findAll();
        $form = $this->createForm(new \Parabola\TimeSheetBundle\Form\TimeSheetType(),$repository);

我有实体类TimeSheetDaily。在构建TimeSheetType的表单时，我将TimeSheetDaily类对象的数组传递给表单类型。并且TimeSheetType有DailyType的集合。它没有设置集合字段的值，它只是一个TimeSheetDaily实体。

Answer 1

TimeSheetDaily类的__constructor定义好了吗？有这样的东西吗？

public function __construct(){
//....

$this->dailyTimeSheet = new ArrayCollection();

//....
};

为了让Symfony能够向其中插入数据，正确初始化此集合非常重要……