Symfony 断言回调在管理类中不起作用

如何解决Symfony 断言回调在管理类中不起作用

@Assert\Callback 不起作用，我不明白为什么，我做错了什么？我想检查 competitionTypes 字段中是否至少有一个值。在项目的其他实体中，验证有效，但不适用于该实体。

实体：

/**
 * @ORM\Table(name="experience_in_competition")
 * @ORM\Entity()
 * @Gedmo\SoftDeleteable(fieldName="deletedAt",timeAware=false)
 */
class ExperienceInCompetition
{
    /**
     * @var int
     *
     * @ORM\Column(name="id",type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * @var string
     * @Assert\NotBlank(
     *     message="value is invalid(field must be non empty)",*     groups={"KNS-2020-2"}
     *     )
     *
     * @ORM\Column(name="year",type="string",nullable=true)
     */
    protected $year;

    /**
     * @ORM\ManyToMany(targetEntity="NKO\OrderBundle\Entity\Application\KNS\SecondStage2020\CompetitionType")
     * @ORM\JoinTable(name="application_competition_type",*     joinColumns={@ORM\JoinColumn(name="application_id",referencedColumnName="id",onDelete="CASCADE")},*         inverseJoinColumns={@ORM\JoinColumn(name="competition_type_id",referencedColumnName="id")}
     * )
     */
    protected $competitionTypes;

    public function __construct(string $year)
    {
        $this->setYear($year);
        $this->competitionTypes = new ArrayCollection();
    }

    /**
     * @Assert\Callback
     */
    public function isValidCompetitionType(ExecutionContextInterface $context,$payload)
    {
        if ($this->getCompetitionType()->isEmpty()) {
            $context->buildViolation('value is invalid(field must be non empty)')
                ->atPath('competitionTypes')
                ->addViolation();
        }
    }
}

管理类：

class ExperienceInCompetitionAdmin extends AbstractAdmin
{
    protected function configureFormFields(FormMapper $formMapper)
    {
        $formMapper
            ->add('year',TextType::class,[
                'label' => 'Год','required' => false,'disabled' => true
            ])
            ->add('competitionType',EntityType::class,[
                'class' => CompetitionType::class,'label' => 'Конкурс','query_builder' => function (EntityRepository $er) {
                    return $er->createqueryBuilder('u')
                        ->andWhere('u.code = :name')
                        ->setParameters(['name' => ApplicationTypes::KNS_APPLICATION_SECOND_STAGE_2020]);
                },'multiple' => true,])
        ;
    }
}

来自该实体的值未经验证，我尝试将组插入到 @Assert\Callback 中，对于字段 $year，它没有帮助。此类条目也无济于事：

 * @Assert\Count(
 *     min="1",*     minMessage="value is invalid(field must be non empty)",*     groups={
 *         "KNS-2020-2"
 *     }
 * )