动态添加字段到 CollectionType

Question

我必须创建一个学校管理员。当老师必须提交评估结果时，他必须通过评分等级来评估给定的技能。

Evaluation ------一对多------ Scale ------多对一------ Skill

评估类型

class EvaluationType extends AbstractType
{
    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('scales', CollectionType::class, [
                'entry_type' => ScaleType::class
            ]);
    }
}

ScaleType

class ScaleType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('value');
    }
}

我想动态添加 ScaleType children 到 EvaluationType::scales 形式 child 给定的 Skill 集合。

这是我迄今为止在控制器操作中尝试过的内容：

public function newEvaluation(Classroom $classroom, Subject $subject, Period $period)
{
    $evaluation = new Evaluation();
    $evaluation->setClassroom($classroom);
    $evaluation->setSubject($subject);
    $evaluation->setPeriod($period);

    $form = $this->createForm(EvaluationType::class, $evaluation);
    $skills =$this->getDoctrine()->getRepository('AppBundle:Skill')->findAll();
    foreach($skills as $skill) {
        $scale = new Scale();
        $scale->setEvaluation($evaluation);
        $scale->setSkill($skill);
        $form['scales']->add($this->createForm(ScaleType::class, $scale, [
            'auto_initialize' => false
        ]));
    }

    return $this->render('classrooms/newEvaluation.html.twig', [
        'form' => $form->createView(),
        'classroom' => $classroom,
        'subject' => $subject
    ]);
}

问题是我在渲染的 scales 字段中只得到一个 sub-form，看起来当我将 children 添加到 $form['scales'] 时它会覆盖上一个children.

我想我做的完全错了。我怎样才能做到这一点？

我还指出，我无法先创建 Evaluation，然后在另一页上创建所有 Scale。它需要在相同的 controller/page.

中完成

编辑：我要补充一点，我不希望 scales 的 children 是可扩展的，它们必须是由服务器修复，而不是被客户端获取。

Answer 1

解决了，感谢 Artamiel，这是我的新控制器操作：

public function newEvaluation(Classroom $classroom, Subject $subject, Period $period)
{
    $evaluation = new Evaluation();
    $evaluation->setClassroom($classroom);
    $evaluation->setSubject($subject);
    $evaluation->setPeriod($period);

    $skills = $this->getDoctrine()->getRepository('AppBundle:Skill')->findAll();
    foreach ($skills as $skill) {
        $scale = new Scale();
        $scale->setSkill($skill);
        $scale->setEvaluation($evaluation);
    }

    $form = $this->createForm(EvaluationType::class, $evaluation);

    return $this->render('classrooms/newEvaluation.html.twig', [
        'form' => $form->createView(),
        'classroom' => $classroom,
        'subject' => $subject
    ]);
}

动态添加字段到 CollectionType

Dynamically add fields to CollectionType

php

symfony

symfony2-forms