authlogic_controller_example.rb

class ApplicationController < ActionController::Base
  helper :all
  helper_method :current_user_session, :current_user
  filter_parameter_logging :password, :password_confirmation
  
  protected
  def current_user_session
    return @current_user_session if defined?(@current_user_session)
    @current_user_session = UserSession.find
  end
    
  def current_user
    return @current_user if defined?(@current_user)
    @current_user = current_user_session && current_user_session.record
  end
    
  def require_user
    unless current_user
      store_location
      flash[:notice] = "You must be logged in to access this page"
      redirect_to new_user_session_url
      return false
    end
  end

  def store_location
    session[:return_to] = request.request_uri
  end
    
  def redirect_back_or_default(default)
    redirect_to(session[:return_to] || default)
    session[:return_to] = nil
  end
end