First of all, I apologise in advance if this is the not right place to report this bug.
I encounter this error after upgrading to hibernate 6 but, based on my findings, it occurs only with Kotlin (it works properly in Java).
I decided to open a ticket here because it works properly with Hibernate version 5.x
h4. Context
I have defined this table
{code:sql}CREATE TABLE vehicles (
id uuid DEFAULT random_uuid(),
vehicle_type varchar(255) not null,
brand varchar(255) not null
);
insert into vehicles (vehicle_type, brand) values ('CAR', 'Audi'){code}
and defined these two entities with {{SINGLE_TABLE}} hierarchy:
{noformat}@Entity
@Table(name = "vehicles")
@DiscriminatorColumn(name = "vehicle_type", discriminatorType = DiscriminatorType.STRING)
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
abstract class VehicleKotlin(
@Id
open var id: UUID,
@Column(name = "brand")
open var brand: String,
)
@Entity
@DiscriminatorValue("CAR")
data class CarKotlin(
@Id override var id: UUID,
override var brand: String,
) : VehicleKotlin(
id = id,
brand = brand,
){noformat}
h4. Error
When I try to query the database
{code:sql}FROM CarKotlin WHERE brand =’Audi'{code}
it seems like that the serialization does not work work properly.
As you can see in the attachment, {{id}} and {{brand}} are null while {{VehicleKotlin.id`}} and`VehicleKotlin.brand` are set with the right values (but they don’t even exist in the model).
In this demo ([https://github.com/detomarco/hibernate-bug-report|https://github.com/detomarco/hibernate-bug-report|smart-link] ) you can find the same example written Java and Kotlin with Hibernate 5 and 6. The only combination that does NOT work is Koltin/Hibernate 6
Thank you in advance |
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