Multiple robots.txt for subdomains in rails

Question

I have a site with multiple subdomains and I want the named subdomains robots.txt to be different from the www one.

I tried to use .htaccess, but the FastCGI doesn\'t lo

Answer 1

As of Rails 6.0 this has been greatly simplified.

By default, if you use the :plain option, the text is rendered without using the current layout. If you want Rails to put the text into the current layout, you need to add the layout: true option and use the .text.erb extension for the layout file. Source

class RobotsController < ApplicationController 
  def robots
    subdomain = request.subdomain # Whatever logic you need
    robots = File.read( "#{Rails.root}/config/robots.#{subdomain}.txt")
    render plain: robots
  end
end

In routes.rb

get '/robots.txt', to: 'robots#robots'