class PostChildNoSequenceGenerator: SequenceStyleGenerator() {
    override fun determineIncrementSize(params: Properties?): Int = 1
    override fun generate(session: SharedSessionContractImplementor, obj: Any): Any {
        val id = (session.getEntityPersister(null, obj).getIdentifier(obj, session) as Post.Key).postChildNo
        return if (id == -1L) super.generate(session, obj) else id
    }
}