未定义名称'Order'

Question

我有这个错误

Name 'Order' is not defined

在以下克劳：

            try:
                order = Order.objects.from_request(request)
                cart = OrderCart(order)
            except Order.DoesNotExist:
                pass

Order 在同一个文件中完全定义，并且是 model.Model 的子类

更具体地说，这是我正在使用的文件：https://bitbucket.org/chris1610/satchmo/src/a04c87a539f3/satchmo/apps/satchmo_store/shop/models.py第 242 行出现异常

为什么会这样？

更新：

以下是回溯：

Traceback:
File "/home/evgeniuz/.virtualenvs/port/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  100.                     response = callback(request, *callback_args, **callback_kwargs)
File "/home/evgeniuz/src/chillifish-pg/lib/payment/views/balance.py" in balance_remaining_order
  30.         template='shop/checkout/balance_remaining.html')
File "/home/evgeniuz/src/chillifish-pg/pg/pgstore/utils.py" in _view
  38.             return view_func(request, *args, **kwargs)
File "/home/evgeniuz/src/chillifish-pg/lib/payment/views/balance.py" in balance_remaining
  66.         'paymentmethod_ct': len(config_value('PAYMENT', 'MODULES'))
File "/home/evgeniuz/.virtualenvs/port/lib/python2.7/site-packages/django/template/context.py" in __init__
  149.             self.update(processor(request))
File "/home/evgeniuz/src/chillifish-pg/lib/satchmo_store/shop/context_processors.py" in settings
  21.     cart = Cart.objects.from_request(request)
File "/home/evgeniuz/src/chillifish-pg/lib/satchmo_store/shop/models.py" in from_request
  237.                 except Order.DoesNotExist:
Exception Type: NameError at /shop/checkout/balance/1/
Exception Value: global name 'Order' is not defined

Answer 1

也许我只是错过了一些东西，但是您在定义之前指的是 CartManager 中的 Order 类。 直到第 642 行才定义顺序。我对 Django 的内部工作原理了解不多，但我会尝试将 Order 类移到 CartManager 上方，看看它是否能让你克服这个错误。

Answer 2

供将来参考。

我想你忘了导入订单类