text: from django.db import migrations, models
  import django.db.models.deletion
  from django.db import transaction
  
  
  def migrate_order(apps, schema_editor):
      Order = apps.get_model("trade", "Order")
  
      DeliveryAddress = apps.get_model("trade", "DeliveryAddress")
      Invoice = apps.get_model("trade", "Invoice")
      Items = apps.get_model("trade", "Items")
  
      GoodsBackup = apps.get_model("trade", "GoodsBackup")
      Orders = apps.get_model("trade", "Orders")
  
      with transaction.atomic():
          for order in Order.objects.all():
              address = DeliveryAddress.objects.create(address_info=order.address_info,
                                                       sign_name=order.signer_name,
                                                       mobile_phone=order.singer_mobile)
              invoice = Invoice.objects.create(invoice_type=order.inv_type, title=order.inv_title,
                                               taxNumber=order.inv_taxNumber, companyAddress=order.inv_companyAddress,
                                               telephone=order.inv_telephone, bankName=order.inv_bankName,
                                               bankAccount=order.inv_bankAccount)
  
              instance = Orders.objects.create(user=order.user, shop=order.shop, order_sn=order.order_sn,
                                               trade_no=order.trade_no, remark=order.remark, status=order.status,
                                               order_amount=order.order_mount, postage_total=order.postage_total,
                                               real_amount=order.real_mount,
                                               asset_pay=order.asset_pay, recharge_pay=order.recharge_pay,
                                               discount=order.discount, pay_time=order.pay_time,
                                               flag_time=order.flag_time, invoice=invoice,
                                               delivery_address=address, add_time=order.add_time)
              for i in order.items.all():
                  goodsbackup = GoodsBackup.objects.create(order=instance, goods=i.goods, gtype_id=getattr(i.gtype, 'id', None), goods_name=i.goods_name,
                                                           gtype_name=i.gtype_name, g_image=i.g_image, price=i.price,
                                                           original_price=i.original_price, market_price=i.market_price, num=i.num,
                                                           share_user_id=i.share_user_id, g_rebate=i.g_rebate, g_bonus=i.g_bonus,
                                                           delivery_method='express')
                  item = Items.objects.create(order=instance, goods_backup=goodsbackup, send_type=i.status,
                                              express_num=i.express_num,
                                              express_company=i.express_company, send_time=i.send_time,
                                              receive_time=i.receive_time,
                                              flag_time=i.flag_time)
  
  
  class Migration(migrations.Migration):
      initial = True
  
      dependencies = [
          ('trade', '0029_auto_20190107_2141'),
  
      ]
  
      operations = [
          migrations.RunPython(migrate_order),
  
      ]
  