require 'csv' require 'active_model' require 'active_model/exporter' require 'active_model/array_exporter' require 'active_model/exporter/version' if defined?(ActionController) require 'action_controller/exportation' ActionController::Renderers.add :csv do |csv, options| self.content_type ||= Mime::CSV csv.respond_to?(:to_csv) ? csv.to_csv : csv end ActiveSupport.on_load(:action_controller) do include ::ActionController::Exportation end end