EasyAdmin 4 Symfony 6 dropdown field shows only one class type extending the InheritanceType one

Question

The applicant is the base class:

#[ORM\Entity(repositoryClass: ApplicantRepository::class)]
#[ORM\InheritanceType('JOINED')]
#[ORM\DiscriminatorColumn(name: 'type', type: Types::STRING)]
#[ORM\DiscriminatorMap([
    ApplicantType::COMPANY->value => Company::class,
    ApplicantType::PERSON->value => Person::class,
])]
abstract class Applicant
{
    #[ORM\Column(type: UuidType::NAME)]
    #[ORM\Id]
    #[ORM\GeneratedValue(strategy: 'NONE')]
    protected AbstractUid $id;

The Service class has following property:

 #[ORM\ManyToOne(targetEntity: Applicant::class, cascade: ['persist'], inversedBy: 'services')]
 #[ORM\JoinColumn(nullable: false)]
 private Applicant $applicant;

Then in the ServiceController

public function configureFields(string $pageName): iterable
    {
        return [
            AssociationField::new('applicant', t('backoffice.performances.APPLICANT')),
            ...

The result is that in the form pages of the ServiceController, the Applicant dropdown shows only Person entities instead of showing Company ones too.

The id of the Applicant is protected as suggested in some GitHub issues, but it didn't fix the issue.

Answer 1

The answer is to add the class form type option as follows:

AssociationField::new('applicant', t('backoffice.performances.APPLICANT'))
  ->setFormTypeOptions([
     'class' => Applicant::class
  ])