An easy and flexible way to set global variables for a Rails app using Ostruct.

global_settings.rb

require "ostruct"

case RAILS_ENV
 when "staging"
   google_maps_key = 'staging google maps key'
   support_email = 'support@email.com'
   ssl_subdomain = 'secure'
   original_subdomain = 'www'
 when "production"
   google_maps_key = 'production google maps key'
   support_email = 'support@email.com'
   ssl_subdomain = 'secure'
   original_subdomain = 'www'
 else
   support_email = 'localhost'
   google_maps_key = 'development google maps key'
   ssl_subdomain = 'secure'
   original_subdomain = 'www'
 end
   
App = OpenStruct.new({
  :settings => OpenStruct.new({
    :page_limit => 25,
    :ssl_subdomain => ssl_subdomain,
    :original_subdomain => original_subdomain,
    :google_maps_key => google_maps_key,
    :support_email => support_email,
    :html_default_title => 'Site Title'
  })
})

# Use App.settings.page_limit