Export to CSV

exportable.rb

module Exportable
  extend ActiveSupport::Concern

  module ClassMethods
    def to_csv(options = {})
      columns = options[:columns] || column_names

      CSV.generate do |csv|
        csv << columns
        all.each do |item|
          csv << item.attributes.values_at(*columns)
        end
      end
    end
  end
end