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Castle/ Active Records: How do you count objects?

I'm trying to do a simple "Select Count(*) from PRODUCTS where date > xxx" with Castle on NHibernate.

If I was directly using NHibernate, I could reuse this question answers but unfortunately I see no easy way to access the Current NHibernate session from Castle Records.

I obviously don't want to retrieve all my objects and do a Count on the C# side ;). I only need to know how many objects there are.

Any ideas?

Solution

  • There are many ways to do this, the simplest is:

    ActiveRecordMediator<Product>.Count(Expression.Gt("date", DateTime.Now))

    or your could use CountQuery, HQL, etc, there are many alternatives.

    UPDATE: for NHibernate 2.0+ it's Restrictions instead of Expression.

    I'll copy common questions like these to the ActiveRecord wiki.