每天一剂Rails良药之Rendering CSV From Your Actions

有时候我们需要输出Comma  Separated Values(CSV)等各种形式的输出来满足用户的需要:

class ExportController < Application ontroller
  def orders
    content_type = if request.user_agent =~ /windows/i
                     'application/vnd.ms-excel'
                   else
                     'text/csv'
                   end

    CSV::Writer.generate(output = "") do |csv|
      Order.find(:all).each do |order|
        csv << [order.id, order.price, order.purchaser, order.created_at]
      end
    end

    send_data(output, :type=> content_type, :filename => "orders.csv")
  end
end