Django 1.1.2 & Python 2.6.5
在执行看似无害的查询集时，我不断收到此错误。看起来与 http://code.djangoproject.com/ticket/7204 中描述的问题完全一样但是，我正在运行 Django 1.1.2，它应该修复了这个错误。有没有人处理过类似的事情？
下面是构造查询的代码:
def get_some_data(self, start_date, end_date):
qset = Transaction.txn_objects.get_transactions_between(self.business,
start_date,
end_date)
income_qset = qset.filter(invoiceitem__invoice__customer = self)
income_qset = income_qset.exclude(
account=F("invoiceitem__taxtypes__account_payable"))
sums = income_qset.aggregate(models.Sum('credit_amount')) # fails here
这是回溯的简化版本(不是很有用):
File ".../models.py" in get_income_between
200. sums = income_qset.aggregate(models.Sum('credit_amount'))
File ".../lib/python2.6/site-packages/django/db/models/query.py" in aggregate
274. query = self.query.clone()
File ".../lib/python2.6/site-packages/django/db/models/sql/query.py" in clone
201. obj.where = deepcopy(self.where, memo=memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
173. y = copier(memo)
File ".../lib/python2.6/site-packages/django/utils/tree.py" in __deepcopy__
61. obj.children = deepcopy(self.children, memodict)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_list
228. y.append(deepcopy(a, memo))
File "/usr/lib/python2.6/copy.py" in deepcopy
173. y = copier(memo)
File ".../lib/python2.6/site-packages/django/utils/tree.py" in __deepcopy__
61. obj.children = deepcopy(self.children, memodict)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_list
228. y.append(deepcopy(a, memo))
File "/usr/lib/python2.6/copy.py" in deepcopy
173. y = copier(memo)
File ".../lib/python2.6/site-packages/django/utils/tree.py" in __deepcopy__
61. obj.children = deepcopy(self.children, memodict)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_list
228. y.append(deepcopy(a, memo))
File "/usr/lib/python2.6/copy.py" in deepcopy
173. y = copier(memo)
File ".../lib/python2.6/site-packages/django/utils/tree.py" in __deepcopy__
61. obj.children = deepcopy(self.children, memodict)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_list
228. y.append(deepcopy(a, memo))
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_tuple
235. y.append(deepcopy(a, memo))
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
338. state = deepcopy(state, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
338. state = deepcopy(state, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_tuple
235. y.append(deepcopy(a, memo))
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
338. state = deepcopy(state, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_tuple
235. y.append(deepcopy(a, memo))
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
338. state = deepcopy(state, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_tuple
235. y.append(deepcopy(a, memo))
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
338. state = deepcopy(state, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
338. state = deepcopy(state, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_tuple
235. y.append(deepcopy(a, memo))
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
338. state = deepcopy(state, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_tuple
235. y.append(deepcopy(a, memo))
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
338. state = deepcopy(state, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
338. state = deepcopy(state, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_tuple
235. y.append(deepcopy(a, memo))
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
338. state = deepcopy(state, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_tuple
235. y.append(deepcopy(a, memo))
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
338. state = deepcopy(state, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
338. state = deepcopy(state, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_tuple
235. y.append(deepcopy(a, memo))
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
338. state = deepcopy(state, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
338. state = deepcopy(state, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_tuple
235. y.append(deepcopy(a, memo))
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
338. state = deepcopy(state, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_tuple
235. y.append(deepcopy(a, memo))
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
338. state = deepcopy(state, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
338. state = deepcopy(state, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
162. y = copier(x, memo)
File "/usr/lib/python2.6/copy.py" in _deepcopy_dict
255. y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.6/copy.py" in deepcopy
189. y = _reconstruct(x, rv, 1, memo)
File "/usr/lib/python2.6/copy.py" in _reconstruct
323. y = callable(*args)
File "/usr/lib/python2.6/copy_reg.py" in __newobj__
93. return cls.__new__(cls, *args)
Exception Type: TypeError at /reports/income_expense/by_customer/32/
Exception Value: instancemethod expected at least 2 arguments, got 0
请您参考如下方法:
为了其他可能遇到此问题的人的利益，错误是由使用 django-multilingual 和 django.db 的 F 对象的组合引起的。重写代码以消除 F 对象解决了这个问题。
根本原因实际上是 Python 中的错误，有关详细信息，请参阅 http://bugs.python.org/issue1515
