PrimeDigit - A Design Blog by Will Shaver

Incredibly simple, but quite useful:

        public static void Save(this ISession session, params object [] entities)

        {

            foreach (var o in entities)

            {

                session.Save(o);

            }

        }

You can use it like:

session.Save(a,b,c,d,....);

with a list of objects of any type. Useful for unit testing where you want to save multiple items at once.

[Update]

Probably should call it something other than Save, such as SaveAll or SaveList because if you only pass two items to the overload it calls the standard Save(object, int id) version. :(

This simple function cleans up a lot of the Alias sillyness I have fought with in NHibernate.

It is used any time you would previously call CreateCriteria and pass an alias.
Before:
session.CreateCriteria(typeof (Product)).CreateCriteria("Orders","Product_Orders");
After:
session.CreateCriteria(typeof(Product)).CriteriaByLongAlias("Orders");

The alias part is done automatically based on the criteria path. The advantage is that it works recursively, allowing for multiple criteria to be created, and then referenced without duplicates.

ICriteria criteria = session.CreateCriteria(typeof(Product)).CriteriaByLongAlias("Orders").CriteriaByLongAlias("Customer").Add(Expression.Eq("Name", "Ace Hardware"));
criteria.CriteriaByLongAlias("Orders").Add(Expression.Eq("OrderNumber",12354));

etc.

Note that in order for it to work, you have to create all your subcriteria with it.

-Will