Sessions - active record store

Question -
I’m using acts_as_authenticated and would like to store sessions in
ActiveRecord.
I’ve done the correct call in config/environment.rb
Still no sessions are being recorded in AR.

In looking through the code of AAA I see in authenticated_system.rb
there is this call:

module AuthenticatedSystem
protected
# Returns true or false if the user is logged in.
# Preloads @current_user with the user model if they’re logged in.
def logged_in?
(@current_user ||= session[:user] ?
User.find_by_id(session[:user]) : :false).is_a?(User)
end

# Accesses the current user from the session.
def current_user
  @current_user if logged_in?
end

# Store the given user in the session.
def current_user=(new_user)
  session[:user] = (new_user.nil? || new_user.is_a?(Symbol)) ? nil

: new_user.id
@current_user = new_user
end

Shouldn’t the def current_user set the user id in an active record
session ?

TIA
Stuart

Thought I had restarted server before posting but did it again.
Sessions now working.
Sorry
Stuart