On Sun, 10 Mar 2013 18:34:58 -0400, Roy Smith wrote:
> Yeah, that's what I was afraid of. The "obvious" solution of:
>
> class QuerySet(mongoengine.queryset.QuerySet):
> def __init__(self, document, collection):
> super(QuerySet, self).__init__(document, collection) [...]
> del self.__len__
>
> results in:
>
> [rest of stack dump elided]
> del self.__len__
> AttributeError: __len__
>
> which I don't understand.
You don't define a per-instance custom QuerySet attribute called __len__,
so you can't delete it from the instance.
The existing __len__ attribute is attached to the mongoengine
queryset.QuerySet class, not the instance. You could monkeypatch the
parent class, but that will probably break something else:
del mongoengine.queryset.QuerySet.__len__
or you could try over-riding __len__ with a fake that pretends it doesn't
exist:
def __len__(self):
raise AttributeError
Try that and see it it works. (It may not.)
--
Steven
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