Uninitialized constant Error

application.html.haml

# views/layouts/application.html.haml
# Rails Error: uninitialized constant ActionView::CompiledTemplates::DOMAIN_CONFIG

    %p 
      Request Domain
      = request.domain.inspect
      DOMAIN_CONFIG:
      = DOMAIN_CONFIG.to_yaml

domains.rb

# Multiple Domain Name Setup
#
# Map Various domain names: [deezteez.tld, anticlothes.tld] in
# config/domains.yml to theme which 

require 'yaml'

raw_config = File.read(RAILS_ROOT + "/config/domains.yml")
DOMAINS_CONFIG = YAML.load(raw_config)[RAILS_ENV]

domains.yml

# config/domains.yml
production:
  domains:
    - 
      :name: foo.com
      :template: foo 
    - 
      :name: bar.com  
      :template: bar
development: &non_production_settings
  domains:
    - 
      :name: foo.dev
      :template: foo 
    - 
      :name: bar.dev  
      :template: bar
test: 
  <<: *non_production_settings