ActionController::RoutingError (No route matches [GET] “/favicon.ico”) in Rails

Question

I have tried to use

as well as this

Answer 1

This is what Rails generates in application.html.erb by default:

<%= favicon_link_tag 'favicon.ico', :rel => 'shortcut icon' %>

It doesn't find favicon.ico this way when it's under /public

It works correctly (finds favicon.ico under /public) if you change the tag to:

<%= favicon_link_tag %>