Ruby on Rails. Class "active" for menu items based on Path or Controller and Action names

application_helper.rb

ACTIVE_CLASS = 'is-active'.freeze

def active_for(options)
  name_of_controller = options.fetch(:controller) { nil }
  name_of_action     = options.fetch(:action) { nil }
  request_path       = options.fetch(:path) { nil }

  return ACTIVE_CLASS if request_path && request_path == request.path

  if name_of_controller == controller_name
    ACTIVE_CLASS if name_of_action.nil? || (name_of_action == action_name)
  end
end

bootstrap_menu_example.html.erb

<div id="navbar" class="navbar-collapse collapse">
  <ul class="nav navbar-nav navbar-right">
    <li class='<%= active_for(path: "/users/#{current_user.id}") %>'>
      <%= link_to current_user %>
    </li>
    <li class='<%= active_for(controller: "events") %>'>
      <%= link_to events_path %>
    </li>
    <li class='<%= active_for(controller: "users", action: "edit") %>'>
      <%= link_to edit_user_path(current_user) %>
    </li>
  </ul>
</div>

awesome work!