Edit file File name : TeamCustomerForm.php Content :<?php /* * This file is part of the Kimai time-tracking app. * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace App\Form; use App\Entity\Team; use App\Form\Type\CustomerType; use Symfony\Component\Form\AbstractType; use Symfony\Component\Form\FormBuilderInterface; use Symfony\Component\OptionsResolver\OptionsResolver; class TeamCustomerForm extends AbstractType { /** * {@inheritdoc} */ public function buildForm(FormBuilderInterface $builder, array $options) { $builder ->add('customers', CustomerType::class, [ 'multiple' => true, 'expanded' => true, 'by_reference' => false, 'query_builder_for_user' => false, 'required' => false, ]) ; } /** * {@inheritdoc} */ public function configureOptions(OptionsResolver $resolver) { $resolver->setDefaults([ 'data_class' => Team::class, 'csrf_protection' => true, 'csrf_field_name' => '_token', 'csrf_token_id' => 'admin_team_customer', 'attr' => [ 'data-form-event' => 'kimai.teamUpdate' ], ]); } } Save