Fluent NHibernate Cascade - Which side?

Question

In using Fluent NHibernate, I can't seem to find a good explanation of when you use the cascading option on the References side vs. the HasMany side.

What's the difference (if any) in mapping the following...

References(...).Cascade.All();

vs

HasMany(...).Cascade.All();

My question stems from a problem when saving a parent (root) entity. Once it's saved, I want to insure that all child objects are also persisted.

Answer 1

You put the cascade on the side that you are saving.

If you save the parent and want to cascade to the children, put the cascade mapping on the parent.