NHibernate: SaveOrUpdate by <natural-id>

Question

Is there an easy way to make NH INSERT or UPDATE an entity depending on whether there is already an entity with same <natural-id />?

The entity is mapped to another (root) one using <many-to-one cascade="save-update" />.

Answer 1

Not automatically. You will have to read from the database to see if a record for that natural-id already exists and then determine if you need to do an insert or update. Which of course means that the cascade won't work.

I was looking for something similar in How do I Insert or Update (or overwrite) a record using NHibernate?