Symfony-EntityType select重复相同的选项

在Symfony 3.3.4中构建表单,并使用 EntityType 获取对象的选择列表。

出于某种原因,当我使用某个实体时,选择列表返回具有相同id的所有相同选项,即使数据库表包含具有不同id和名称的行。

$form->add('projectComplexity', EntityType::class, array(
    'class' => 'AppBundle:ProjectComplexity',
    'choice_label' => 'name',
    'choice_value' => 'id',
    'placeholder' => 'Choose an option',
    'label_attr' => array('title' => 'Project complexity associated with this project'),
    'query_builder' => function (EntityRepository $v) {
        return $v->createQueryBuilder('v')->orderBy('v.name',' ASC');
    },
))

<?php

namespace AppBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
use Symfony\Component\Form\Extension\Core\Type\TextareaType;
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Bridge\Doctrine\Form\Type\EntityType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Doctrine\ORM\EntityRepository;

class ProductType extends AbstractType
{
    /**
     * {@inheritdoc}
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('productCategory', EntityType::class,
                array(
                    'class' => 'AppBundle:ProductCategory',
                    'choice_label' => 'name',
                    'choice_value' => 'id',
                    'placeholder' => 'Choose an option',
                    'label_attr' => array('title' => 'Category for this product'),
                    'query_builder' => function (EntityRepository $v) {
                        return $v->createQueryBuilder('v')
                            ->orderBy('v.name',' ASC');
                    }
                ))
            ->add('name',TextType::class)
            ->add('detail',TextType::class)
            ->add('description',TextareaType::class, array(
                'attr' => array('cols' => '80', 'rows' => '10')
            ))
            ->add('supportDescription',TextareaType::class, array(
                'attr' => array('cols' => '80', 'rows' => '10')
            ))
            ->add('isCircuit', CheckboxType::class,  array('required' => false))
            ->add('deliveryType', EntityType::class,
                array(
                    'class' => 'AppBundle:DeliveryType',
                    'choice_label' => 'name',
                    'choice_value' => 'id',
                    'label_attr' => array('title' => 'Type of delivery for this product'),
                    'query_builder' => function (EntityRepository $v) {
                        return $v->createQueryBuilder('v')
                            ->orderBy('v.name',' ASC');
                    }
                ))
            ->add('projectComplexity', EntityType::class,
                array(
                    'class' => 'AppBundle:ProjectComplexity',
                    'choice_label' => 'name',
                    'choice_value' => 'id',
                    'placeholder' => 'Choose an option',
                    'label_attr' => array('title' => 'Project complexity associated with this project'),
                    'query_builder' => function (EntityRepository $v) {
                        return $v->createQueryBuilder('v')
                            ->orderBy('v.name',' ASC');
                    }
                ))
        ;
    }

    /**
     * {@inheritdoc}
     */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'AppBundle\Entity\Product'
            )
        );
    }

    /**
     * {@inheritdoc}
     */
    public function getBlockPrefix()
    {
        return 'app_bundle_product_type';
    }
}