有人见过这个错误吗?每当我试图对我的特定模型执行查询时,它就会出现。直接查询db工作得很好,它不会发生在其他模型上。
例如,它由以下内容触发:
MyModel.objects.get(name__iexact = 'an existent name')
我相信这是在使用South进行数据库迁移之后立即开始的。我可以回滚迁移,但我不想让事情变得更糟,所以我先来这里。
- Django 1.3
- PostgreSQL 8.4.8 Python 2.7.0
- iPython 0.10.2 Ubuntu 10.10 64位
任何想法?
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (173, 0))
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
/home/<path to python>/<ipython console> in <module>()
/home/<path to python>/python2.7/site-packages/django/db/models/manager.pyc in get(self, *args, **kwargs)
130
131 def get(self, *args, **kwargs):
--> 132 return self.get_query_set().get(*args, **kwargs)
133
134 def get_or_create(self, **kwargs):
/home/<path to python>/python2.7/site-packages/django/db/models/query.pyc in get(self, *args, **kwargs)
342 if self.query.can_filter():
343 clone = clone.order_by()
--> 344 num = len(clone)
345 if num == 1:
346 return clone._result_cache[0]
/home/<path to python>/python2.7/site-packages/django/db/models/query.pyc in __len__(self)
80 self._result_cache = list(self._iter)
81 else:
---> 82 self._result_cache = list(self.iterator())
83 elif self._iter:
84 self._result_cache.extend(self._iter)
/home/<path to python>/python2.7/site-packages/django/db/models/query.pyc in iterator(self)
287
288 # Store the source database of the object
--> 289 obj._state.db = db
290 # This object came from the database; it's not being added.
291 obj._state.adding = False
AttributeError: 'NoneType' object has no attribute 'db'
为这一点自责,特别是考虑到回想起来错误信息是多么明显。
我的迁移已经向模型添加了一个名为"_state"的新字段。这个字段与查询的第289行中引用的对象的_state属性发生冲突。佩克以上。
所以新的教训:在Django模型中没有字段可以被命名为"_state"
应该作为bug报告提交吗?