matter of style

after.rb

class ProfileController < ActionController::Base
  private
    def current_user
      @current_user ||= User.find_by_username(session[:username]) if session[:username]
    end
    helper_method :current_user
end

before.rb

class ProfileController < ActionController::Base
  before_filter :set_current_user
  
  private
    def set_current_user
      @current_user = User.find_by_username(session[:username]) if session[:username]
    end
end