application_with_config.rb

# needs the "hashie" gem in Gemfile
require 'erb'

module Movies
  class Application < Rails::Application

    settings = ERB.new(IO.read(File.expand_path('../settings.yml', __FILE__))).result
    mash = Hashie::Mash.new(YAML::load(settings)[Rails.env.to_s])

    mash.each do |key, value|
      config.send("#{key}=", value)
    end

  end
end