Composite-id class must implement Serializable: io.digiwave.entities.StoreEntity

[softshipper]

Hi all,

I try to use Hibernate in Quarkus with Kotlin.
The entity definition looks as follows:

@Entity
open class StoreEntity(
) : PanacheEntity() {
    @EmbeddedId
    lateinit var userId: UserId
    lateinit var password: String
    var createdAt: Long = 0
}

and the composite key:

@Embeddable
open class UserId(
) : Serializable {
    lateinit var id: String
}

Unfortunately the compiler complains:

Caused by: org.hibernate.MappingException: Composite-id class must implement Serializable: io.digiwave.entities.StoreEntity
        at org.hibernate.mapping.RootClass.checkCompositeIdentifier(RootClass.java:293)
        at org.hibernate.mapping.RootClass.validate(RootClass.java:276)
        at org.hibernate.boot.internal.MetadataImpl.validate(MetadataImpl.java:359)
        at io.quarkus.hibernate.orm.runtime.recording.PrevalidatedQuarkusMetadata.validateAndWrap(PrevalidatedQuarkusMetadata.java:58)

As you can see the Serializable interface is implemented in the composite keys.
What am I doing wrong?

Best regards

[quarkus-bot[bot]]

/cc @evanchooly

[evanchooly]

Make sure it's Java's Serializable and not Kotlin's.

[softshipper]

HI @evanchooly
First of all thanks for your answer. I tried it out as follows:

UserId.kt

import java.io.Serializable
import javax.persistence.Embeddable

@Embeddable
open class UserId : Serializable {
    lateinit var id: String
}

StoreEntity.kt

import io.quarkus.hibernate.reactive.panache.PanacheEntity
import javax.persistence.EmbeddedId
import javax.persistence.Entity

@Entity
open class StoreEntity(
) : PanacheEntity() {
    @EmbeddedId
    lateinit var userId: UserId
    lateinit var password: String
    var createdAt: Long = 0
}

Unfortunately the same error message as I mentioned above.

You can find the example here
kihibernate.zip