My problem is that I can't get this helper tag to display at all.
So in application_helper.rb I want to have a
<% nav_link(name, path) %>
def nav_link(name, path)
content_tag(:li, :class => active_class(path)) do
link_to name, path
(current_page?(path) ? "active" : "").html_safe
<% nav_link("Users", users_path) %>
Unless it's a typo, you should use
<%= nav_link("Users", users_path) %>.
=, nothing will be displayed