RavenDB setup for MVC controller

controller.cs

        public IDocumentSession session { get; protected set; }
        protected override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            session = MvcApplication.Store.OpenSession();
        }
        protected override void OnActionExecuted(ActionExecutedContext filterContext)
        {
            if (filterContext.IsChildAction)
                return;

            using (session)
            {
                if (filterContext.Exception != null)
                    return;

                if (session != null)
                    session.SaveChanges();
            }
        }