r2dbc: insert() operation does not work properly when the id is wrapped in a data class #1407

class MessageRepositoryImpl(private val template: R2dbcEntityTemplate) : MessageRepository {
    override suspend fun save(messageEntity: MessageEntity): MessageEntity =
        template.insert<MessageEntity>().usingAndAwait(messageEntity)
}

@Table("messages")
data class MessageEntity(
    @Id
    @Column("id")
    val id: Int = 0,
}

data class MessageId(private val value: Int) {
    fun toInt() = value
    override fun toString(): String = value.toString()
}

@Table("messages")
data class MessageEntity(
    @Id
    @Column("id")
    val id: MessageId = MessageId(0)
}

@Component
@WritingConverter
class MessageToRowConverter : Converter<MessageEntity, OutboundRow> {
    override fun convert(source: MessageEntity): OutboundRow {
        return OutboundRow()
            .append("id", source.id.toInt())
    }
}

@Component
@ReadingConverter
class RowToMessageConverter : Converter<Row, MessageEntity> {
    override fun convert(source: Row): MessageEntity {
        println("converting from row")
        return MessageEntity(
            id = MessageId(source.getColumn("id"))
        )
    }
}