保留为空的形式symfony

我使用手工制作的实体设置了搜索表单，但是该表单没有将信息传输给该实体...您有解决此问题的想法吗？

同样是symfony 4.4，我已经检查了存储库中的findWeeklyPlanningRs查询，它工作正常。

这是实体：

<?php

namespace App\Entity ;

class FilterWeek
{

  private $nbWeek ;


      public function getNbWeek(): ?int
      {
          return $this-> nbWeek;
      }

      public function setNbWeek(int $nbWeek): self
      {
          $this->$nbWeek = $nbWeek;

          return $this;
      }

}

控制器

  /**
        * @Route("/{id}/week" ,  name="week")
        */

        public function weeklyPlanning(Request $request ,  $id ) : Response
        {

          $em = $this->getDoctrine()->getManager();

          $week = new FilterWeek();

          $form = $this -> createForm(FilterWeekType::class , $week ) ;
          $form->handleRequest($request);





          $planning = $em -> getRepository(Chargement::class) -> findWeeklyPlanningRs($id , $week-> getNbWeek()  ) ;

          $responsableSecteur = $em ->getRepository(ResponsableSecteur::class)->find($id) ;



          return $this -> render('Planing/ResponsableSecteurWeek.html.twig' , [
            'responsable_secteur' => $responsableSecteur,
            'chargements' => $planning ,
            'form' => $form -> createView()
            ] );

        }

表格 ：

<?php

namespace App\Form;

use App\Entity\FilterWeek;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Component\Form\Extension\Core\Type\IntegerType;

class FilterWeekType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('nbWeek' , IntegerType::class , [

              'label' => 'numéro de la semaine' ,
              'required' => false
            ])
        ;
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults([
            'data_class' => FilterWeek::class,
            'method' => 'get',
            'csrf_protection' => false,
        ]);
    }

    public function getBlockPrefix(){

      return '';
    }
}

风景 ：

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

{% block body %}

  <div class="container">

    <h3>Planning des chargements par Semaine</h3>

    <br><br>

    <div class="form-row" >
      <div class="col-4">
        {{ form_start(form) }}
          {{ form_row(form.nbWeek) }}
            <button class="btn color-br"  style="top : 5em;" >Rechercher</button>

        {{ form_end(form) }}
      </div>