> Hello,

> I realize this post is from 2010, but I also had this problem as of July
> 12 2012. It's still one of the first results in a search for the error, so
> I'm posting for future googlers.

> According to the Django Model reference<https://docs.djangoproject.com/en/dev/ref/models/instances/?from=olddocs>,
> you should avoid overriding the __init__ method when inheriting from Model,
> especially if the signature changes. They recommend to instead add a custom
> manager to handle this.

> On Monday, July 5, 2010 7:51:51 PM UTC-7, jcage wrote:

>> Hi everyone. I'm quite new to python and django. I was wondering if
>> anyone could shed some light on this topic :

>> My models.py contains the classes QuestionSet and Question, which
>> inherits the former.
>> In the shell, I define a Question object as follows

>> q1 = Question(script = "How are you?", comment = "no comment", order =
>> 1)

>> but an attempt to run q1.save() results in the following error :

>> >>> q1.save()
>> Traceback (most recent call last):
>>   File "<console>", line 1, in <module>
>>   File "/Library/Frameworks/Python.framework/Versions/2.6/lib/
>> python2.6/site-packages/django/db/models/base.py", line 435, in save
>>     self.save_base(using=using, force_insert=force_insert,
>> force_update=force_update)
>>   File "/Library/Frameworks/Python.framework/Versions/2.6/lib/
>> python2.6/site-packages/django/db/models/base.py", line 447, in
>> save_base
>>     using = using or router.db_for_write(self.__class__,
>> instance=self)
>>   File "/Library/Frameworks/Python.framework/Versions/2.6/lib/
>> python2.6/site-packages/django/db/utils.py", line 133, in _route_db
>>     return hints['instance']._state.db or DEFAULT_DB_ALIAS
>> AttributeError: 'Question' object has no attribute '_state'

>> The class definitions are :

>> class QuestionSet(models.Model):
>>     title = models.CharField(max_length=100)
>>     description = models.TextField()
>>     order = models.IntegerField()

>>     def __init__(self, *args, **kwargs):
>>         self.title = kwargs.get('title','Default Title')
>>         self.description = kwargs.get('description', 'DefDescription')
>>         self.order = kwargs.get('order', 0)

>> class Question(QuestionSet):
>>     script = models.CharField(max_length=200)
>>     comment = models.TextField()

>>     def __init__(self, *args, **kwargs):
>>         QuestionSet.__init__(self, args, kwargs)
>>         self.script = kwargs.get('script', "undefined")
>>         self.comment = kwargs.get('comment', "no comment")

>> Would greatly appreciate any suggestions