app/uploaders/raw_image_uploader.rb
class RawImageUploader < CarrierWave::Uploader::Base
include CarrierWave::MiniMagick
storage :fog
def store_dir
"raw_images/#{model.class.to_s.pluralize.underscore}/#{mounted_as}/#{model.id}"
end
def extension_white_list
%w(jpg jpeg gif png svg)
end
end