CarrierWave.configure do |config|
  #config.fog_provider = 'fog/aws'                        # required
  config.fog_credentials = {
    provider:              'AWS',                        # required
    aws_access_key_id:     ENV['AWS_ACCESS_KEY_ID'],                        # required
    aws_secret_access_key: ENV['AWS_SECRET_ACCESS_KEY']                        # required
  }
  config.fog_directory  = ENV['S3_BUCKET_NAME']                          # required
  #config.fog_public     = false                                        # optional, defaults to true
  config.fog_attributes = { 'Cache-Control' => "max-age=#{365.day.to_i}" } # optional, defaults to {}
end

class AvatarUploader < CarrierWave::Uploader::Base

  include CarrierWave::MiniMagick

  # Choose what kind of storage to use for this uploader:
  if Rails.env.production?
    storage :fog
  else
    storage :file
  end

:storage => :s3

:storage => :file_system