Ruby / Rails - Hide Navbar & Footer on Root Page [duplicate]

问题

This question already has an answer here:

How to detect if rails is at the root url? (1 answer)

Closed 3 years ago.

I would like to hide the navbar and footer on the root page only. I am using RoR. I currently have my navbar in my application file to prevent repetitiveness. I assume a filter on my application controller?

回答1:

try this in view application.html.erb :

<% unless controller.controller_name == "your_root_controller" && controller.action_name == "your_action" %>
  <nav> 
       #something
  </nav>
<% end %>

or even you can make in helper something method like this:

def root? 
 controller.controller_name == "your_root_controller" && controller.action_name == "your_action"
end

and next in view application.html.erb:

if root?
  #something html
end

or you can also use current_page?method, and in this way:

in view application.html.erb

if current_page?(root_path)
  # your html
end

来源：https://stackoverflow.com/questions/39355210/ruby-rails-hide-navbar-footer-on-root-page