在对我之前的问题得到很好的回答后，我遇到了另一个问题。
我遵循第三种方法，了解 djangodocs 对抽象模型子类化的说法。
我正在使用最新的 Django，rev 9814。我得到的奇怪行为：
In [1]: o = Order()
In [2]: o.save()
DEBUG:root:STORING EVENT MESSAGE: Order created. pk=2 -- LEVEL TOP
DEBUG:root:Saving order pk=2
# it actually does exist in the database, so everything's cool.
In [3]: o.id
Out[3]: 2L # huh?
In [4]: o._default_manager
Out[4]: <django.db.models.manager.Manager object at 0x16e5370>
In [5]: Order.objects.all()
Out[5]: []
# WTF? and even more WTF below:
In [6]: Order.objects.get(id=2)
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/Users/adam/_dev/cashfire/<ipython console>
/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/django/db/models/manager.py in get(self, *args, **kwargs)
91
92 def get(self, *args, **kwargs):
---> 93 return self.get_query_set().get(*args, **kwargs)
94
95 def get_or_create(self, **kwargs):
/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/django/db/models/query.py in get(self, *args, **kwargs)
333 """
334 clone = self.filter(*args, **kwargs)
--> 335 num = len(clone)
336 if num == 1:
337 return clone._result_cache[0]
/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/django/db/models/query.py in __len__(self)
159 self._result_cache = list(self._iter)
160 else:
--> 161 self._result_cache = list(self.iterator())
162 elif self._iter:
163 self._result_cache.extend(list(self._iter))
/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/django/db/models/query.py in iterator(self)
286 else:
287 # omit aggregates in object creation
--> 288 obj = self.model(*row[index_start:aggregate_start])
289
290 for i, k in enumerate(extra_select):
TypeError: __init__() takes exactly 1 argument (5 given)