我有一个新手问题,我正在寻找与Django类中的Meta类继承相关的概念。以下是模型,如果有人能帮助我,我将不胜感激。继承Django模型中的元类
class Base(models.Model):
code = AutoSlugField(_("Slug"), max_length=128, unique=True,
populate_from='name')
name = models.CharField(_("Name"), max_length=128, unique=True)
description = models.TextField(_("Description"), blank=True)
countries = models.ManyToManyField('Country',
blank=True, verbose_name=_("Countries"))
is_discounted = False
class Meta:
app_label = 'shipping'
ordering = ['name']
verbose_name = _("Shipping Method")
verbose_name_plural = _("Shipping Methods")
class OrderAndItemCharges(Base):
price_per_order = models.DecimalField(
_("Price per order"), decimal_places=2, max_digits=12,
default=D('0.00'))
price_per_item = models.DecimalField(
_("Price per item"), decimal_places=2, max_digits=12,
default=D('0.00'))
free_shipping_threshold = models.DecimalField(
_("Free Shipping"), decimal_places=2, max_digits=12, blank=True,
null=True)
class Meta(Base.Meta):
app_label = 'shipping'
verbose_name = _("Order and Item Charge")
verbose_name_plural = _("Order and Item Charges")
回溯:
class OrderAndItemCharges(Base):
File "C:\Users\AliKhan\supermarekt\market\shipping\models.py", line 46, in Or
derAndItemCharges
class Meta(Base.Meta):
AttributeError: type object 'Base' has no attribute 'Meta'
我已经改变了类导入行为得到了与像以下。这可能会导致问题。原因是我需要缓解店铺仪表板应用程序的代码。于是我进口Django缺省的源导入Django的类和改变它象下面这样:
from django.apps.config import MODELS_MODULE_NAME
def get_class(module_label, classname):
return get_classes(module_label, [classname])[0]
def get_classes(module_label, classnames):
if not module_label:
raise ValueError(
"Module Does Not Exists")
market_module_label = "%s" % (module_label)
market_module = _import_module(market_module_label, classnames)
return _pluck_classes([market_module], classnames)
def _import_module(module_label, classnames):
try:
return __import__(module_label, fromlist=classnames)
except ImportError:
__, __, exc_traceback = sys.exc_info()
frames = traceback.extract_tb(exc_traceback)
if len(frames) > 1:
raise
文件名是loading.py,我学会了从Django的奥斯卡奖。不过,我做了些微的修改,以适应我的需要。所以问题可能在这里。请协助
它曾经以这种方式工作。想知道什么可能会导致这个问题... –
我已经更新了我的问题上面,请看看这可能有所帮助。 –