app/helpers/admin/base_helper.rb
# return 'current' string if the controller name is comments
return 'current' string if the controller name is comments
return ' current ' string if the controller name is comments
def class_comments
    if controller.controller_name == 'comments'
      "current"
    end
  end
def class_comments if controller . controller_name == 'comments' "current" end end
return 'current' string if the controller name is comments
return ' current ' string if the controller name is comments