class ProfilePictureUploader < BaseUploader def default_url(*args) "/images/#{[version_name || args.first, 'no_avatar.png'].compact.join('/')}" end version :large do process resize_to_fit: [500, 500] end version :medium do process resize_to_fit: [256, 256] end version :small do process resize_to_fit: [80, 80] end end