Symfony 3测验项目

Question

我是Symfony框架的新手。我想做一个简单的测验，问题和答案很少。我的问题是只显示一个问题和答案。当我尝试它时，它会向我显示问题的下拉列表以及所有问题的所有答案。

我的数据库是：

questions:
  - id PK
  - question
answers:
  - id PK
  - answer
choices:
  - id PK
  - questions_id FK
  - answers_id FK
  - isCorrect

QuizController：

<?php

namespace AppBundle\Controller;

use Symfony\Component\HttpFoundation\Response;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use AppBundle\Entity\Questions;
use AppBundle\Entity\Answers;
use AppBundle\Entity\Choices;
use Symfony\Component\HttpFoundation\Request;
use AppBundle\Form\QuizType;
use Symfony\Bridge\Doctrine\Form\Type\EntityType;

class QuizController extends Controller
{
    /**
     * @Route("/quiz", name="quiz_index")
     * @param Request $request
     * @return Response
     */
     public function formAction(Request $request)
     {
         $choice = new Choices();
         $form = $this->createForm(QuizType::class, $choice);

         return $this->render("Quiz/quiz.html.twig", ["form" => $form->createView()]);
     }
}

QuizType：

<?php

namespace AppBundle\Form;

use AppBundle\Entity\Answers;
use AppBundle\Entity\Questions;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Bridge\Doctrine\Form\Type\EntityType;
use Symfony\Component\Form\Extension\Core\Type\SubmitType;
use Symfony\Component\Form\Extension\Core\Type\TextType;

class QuizType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('question')
            ->add('answer', EntityType::class, array(
                'class' => Answers::class,
                'multiple' => false,
                'expanded' => true,))
            ->add("submit", SubmitType::class, ["label" => "Zapisz"]);
    }
}

quiz.html.twig

{% extends 'base.html.twig' %}

{% block body %}
    {{ form(form, {'attr': {'novalidate': 'novalidate'}}) }}
{% endblock %}