application.rb

require File.expand_path('../boot', __FILE__)

require 'rails/all'

# Require the gems listed in Gemfile, including any gems
# you've limited to :test, :development, or :production.
Bundler.require(*Rails.groups)
#Bundler.require(:default, Rails.env)
module MyApp
  class Application < Rails::Application
    # Settings in config/environments/* take precedence over those specified here.
    # Application configuration should go into files in config/initializers
    # -- all .rb files in that directory are automatically loaded.

    # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
    # Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC.
    # config.time_zone = 'Central Time (US & Canada)'

    # The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
    # config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s]
    # config.i18n.default_locale = :de
    social_keys = File.join(Rails.root, 'config', 'social_keys.yml')
    CONFIG = HashWithIndifferentAccess.new(YAML::load(IO.read(social_keys)))[Rails.env]
    CONFIG.each do |k,v|
      ENV[k.upcase] ||= v
    end

  end
end

error message

Error:[rake --tasks] rake aborted!
NoMethodError: undefined method `each' for nil:NilClass
/Users/cj/RubymineProjects/MyApp/config/application.rb:26:in `<class:Application>'
/Users/cj/RubymineProjects/MyApp/config/application.rb:10:in `<module:MyApp>'
/Users/cj/RubymineProjects/MyApp/config/application.rb:9:in `<top (required)>'
/Users/cj/RubymineProjects/MyApp/Rakefile:4:in `require'
/Users/cj/RubymineProjects/MyApp/Rakefile:4:in `<top (required)>'
/Users/cj/.rvm/gems/ruby-2.0.0-p451@MyApp/gems/rake-10.3.1/lib/rake/rake_module.rb:28:in `load'
/Users/cj/.rvm/gems/ruby-2.0.0-p451@MyApp/gems/rake-10.3.1/lib/rake/rake_module.rb:28:in `load_rakefile'
/Users/cj/.rvm/gems/ruby-2.0.0-p451@MyApp/gems/rake-10.3.1/lib/rake/application.rb:683:in `raw_load_rakefile'
/Users/cj/.rvm/gems/ruby-2.0.0-p451@MyApp/gems/rake-10.3.1/lib/rake/application.rb:94:in `block in load_rakefile'
/Users/cj/.rvm/gems/ruby-2.0.0-p451@MyApp/gems/rake-10.3.1/lib/rake/application.rb:176:in `standard_exception_handling'
/Users/cj/.rvm/gems/ruby-2.0.0-p451@MyApp/gems/rake-10.3.1/lib/rake/application.rb:93:in `load_rakefile'
/Users/cj/.rvm/gems/ruby-2.0.0-p451@MyApp/gems/rake-10.3.1/lib/rake/application.rb:77:in `block in run'
/Users/cj/.rvm/gems/ruby-2.0.0-p451@MyApp/gems/rake-10.3.1/lib/rake/application.rb:176:in `standard_exception_handling'
/Users/cj/.rvm/gems/ruby-2.0.0-p451@MyApp/gems/rake-10.3.1/lib/rake/application.rb:75:in `run'
/Users/cj/RubymineProjects/MyApp/bin/rake:4:in `<main>'