I have a class I’m creating with Instancio. I have an abstract parent with an id field.

When I test with Instancio, I cannot set the “id” field to null.

@MappedSuperclass
abstract class EntityWithId {
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Id
    @Column(name = "id")
    var id = 0
}

@Entity
@Table(name = "child")
class ChildEntity : EntityWithId() {
    @Basic
    @Column(name = "created")
    var isCreated = false
...

Instancio.of(ChildEntity::class.java)
    .set(Select.field("id"), null) // Fails

However, if I move id into ChildEntity the instancio code works.

How do I select the field in the parent class?