ruby on rails - Carrierwave / Fog / S3 "is not a recognized storage provider" -

i have rails app using carrierwave file uploads. has been working fine want start using amazon s3 image storage. getting error:

argumenterror ( not recognized storage provider):   app/controllers/salons_controller.rb:52:in `update' 

i have made sure have latest gems carrierwave , fog. in gemfile:

gem 'carrierwave' gem 'aws-sdk' gem 'fog' 

fog.rb looks like:

carrierwave.configure |config|     config.fog_credentials = {         :provider              => 'aws',         :aws_access_key_id     => 'myaccesskey',         :aws_secret_access_key => 'mysecretkaccesskey',         :region                => 'us-east-1'     }      config.fog_directory = 'andrunix'     config.fog_public    = true     config.fog_attributes = {'cache-control'=>'max-age=315576000'}  

end

the uploader class looks like:

class salonimageuploader < carrierwave::uploader::base   include carrierwave::rmagick   storage :fog    def store_dir     # "andrunix" bucket name on s3      "andrunix/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"   end end 

if change storage 'file', works fine. setting storage 'fog' generates error.

ok, i'm idiot. :)

at point, don't know where, added fog.rb file carrierwave configuration lib/carrierwave/storage directory. got desperate, paid railscasts subscription watch episode #383 (http://railscasts.com/episodes/383-uploading-to-amazon-s3?autoplay=true) , @ 3:02 found error of ways. carrierwave configuration needed placed in config/initializers/carrierwave.rb.

i don't know got other location once moved config proper location, good.