gistfile1.rb

    @tn = params[:tn][:tracking_number]
    @tns = @tn.split(',')
    if @tns.count >= 2
      @tns.each do |tn|
        @tracking_number = TrackingNumber.new
        @tracking_number.tracking_number = tn
        @tracking_number.order_id = @order.id
        @tracking_number.save
        count +=1
      end
    else
      @tracking_number = TrackingNumber.new
      @tracking_number.tracking_number = params[:tn][:tracking_number]
      @tracking_number.order_id = @order.id
      @tracking_number.save
      count +=1      
    end

@tn = params[:tn][:tracking_number]
@tn.split(',').each do |tn|
  @tracking_number = TrackingNumber.new
  @tracking_number.tracking_number = tn
  @tracking_number.order_id = @order.id
  @tracking_number.save
end