I have installed omniauth 1.0. Also I have oauth-0.4.5, oauth2-0.5.1, omniauth-facebook-1.0.0, omniauth-twitter-0.0.6.
omniauth.rb
Rails.application.config.m
Alex D. is correct in that the ENV[] breaks it. To create omniauth.rb so that it uses different keys in different environments just put:
provider :twitter, TWITTER_KEY, TWITTER_SECRET
in omniauth.rb
and then in your environment config files (config/environments/development.rb, etc.) put the key you want to use for that environment.
config/environments/development.rb:
TWITTER_KEY = 'aaaaaaa'
TWITTER_SECRET = 'aaaabbbbbb'
config/environments/production.rb:
TWITTER_KEY = 'ccccccc'
TWITTER_SECRET = 'ccccffffdffffd'