ActiveRecord.Linq - naive but Working


I’ve spent some times lately with Linq To SQL and have played a bit with the Mapping namespace.

Why I do not like it very much is a matter for a different post. The matter at hand is that I want the power of Linq, and I want the power of NHibernate, and I want the easy road of ActiveRecord.

What do I mean by that? I’d like:

the needed prequisites:

So, Ayende has kick-started it, and with some help from Bobby Diaz, we have a prototype level NHibernate provider for Linq.

To make it work with ActiveRecord, all you need is to add:

using System;using Castle.ActiveRecord;using Castle.ActiveRecord.Framework;using NHibernate;namespace NHibernate.Linq{    public class ActiveRecordContext : NHibernateContext { public ActiveRecordContext() : base(null) { session = GetSession(); }  private ISession GetSession() { ISessionScope scope = SessionScope.Current; if (scope == null) throw new InvalidOperationException("You should be in a SessionScope()"); ISessionFactoryHolder holder = ActiveRecordMediator.GetSessionFactoryHolder(); return holder.CreateSession(typeof(ActiveRecordBase)); } }}

and now you can do stuff like:

using (new SessionScope()){ ActiveRecordContext context = new ActiveRecordContext(); var q =  from c in context.Session.Linq<Category>() select c;  foreach (Category c in q) Console.WriteLine(c.Name); }

Assuming Category has [ActiveRecord] mapping.

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