Example export CSV with CP932 in Ruby on Rails

export-csv.rb

require "csv"

class Admin::ExportsController < Admin::BaseAdminController
  def index
    admin = Admin.first
    csv_string = CSV.generate do |csv|
      csv << Admin.attribute_names
      csv << admin.attributes.values
    end

    respond_to do |format|
      format.csv {send_data csv_string.encode("CP932"),
        :type => 'text/csv; charset=CP932'}
    end
  end
end