Don't rescue Exception

[artworx]

Fom application_controller

def current_user
      begin
        @current_user ||= User.find(session[:user_id]) if session[:user_id]
      rescue Exception => e
        nil
      end
    end

It is bad practice to rescue Exception, see http://stackoverflow.com/questions/10048173/why-is-it-bad-style-to-rescue-exception-e-in-ruby