class AvatarUploader < CarrierWave::Uploader::Base include UploaderHelper storage :file after :store, :reset_events_cache def store_dir "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}" end def reset_events_cache(file) model.reset_events_cache if model.is_a?(User) end def exists? model.avatar.file && model.avatar.file.exists? end end