Navbar active class in rails

_navbar.haml

%nav.menu
  .logo
    = link_to path do
      = image_tag 'logo-index.png', class: 'logo-img'
  %ul.main-menu
    %li.menu-item{class: "#{set_active_class 'welcome'}"}
      = link_to root_path, data: {no_turbolink: false} do
        %i.fa.fa-home
        = t('navbar.home_page')
    %li.menu-item{class: "#{set_active_class 'editor_payment'}"}
      = link_to editor_payment_index_path do
        %i.fa.fa-magnet
        = t('navbar.design')
// set active class from controller name

application_helper.rb

  def set_active_class value
    if params[:controller] == value
      'active'
    end
  end