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Asked: 2026-05-11T03:11:28+00:00

After getting fine answer to my previous question , I came across another problem.

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After getting fine answer to my previous question, I came across another problem.

I followed the third approach, being aware of what djangodocs say about abstract model subclassing.

I am using the latest Django, rev 9814. The strange behaviour I get:

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)
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1 Answer

  1. Ok, my fault (the Pragmatic Progammer’s ‘Don’t blame SQL’ again). It was exactly what traceback was saying, forgot about __init__‘s args & kwagrs. Silly me.

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