php – Symfony pre_submit更改字段顺序

Warning: Illegal offset type in isset or empty

不确定如何解决这个问题.

/**
 * @param FormBuilderInterface $builder
 * @param array $options
 */
public function buildForm(FormBuilderInterface $builder,array $options)
{
    $builder
        ->add('survey',EntityType::class,[
            'class' => SurveyManager::class,'attr' => [
                'class' => 'field-change',],])
        ->add('submit',SubmitType::class,[

        ])
        ->addEventListener(
            FormEvents::PRE_SUBMIT,function (FormEvent $event) {
                $form = $event->getForm();

                $data = $event->getData();
                $modifier = $data['survey'];
                $form->add('headquarter',[
                    'class' => HeadQuarterManager::class,'query_builder' => function (HeadQuarterManagerRepository $er) use ($modifier) {
                        return $er->getHeadquarter($modifier);
                    },]);
            }
        );
}