On Mon, May 16, 2011 at 8:53 PM, Shawn Milochik <sh...@milochik.com> wrote:
> On 05/16/2011 02:48 PM, Marc Aymerich wrote:
>
>> Hi,
>> my question is, How can I define a custom manager that can handle Q
>> objects?
>>
>> Thanks!
>>
> A custom manager, being a subclass of models.Manager, can already handle Q
> objects in the built-in methods, such as filter and get.
>
> What error are you getting?
>
Hi Swawm.
Thanks for your answer.
when I call Model.objects.active_during(Q(Q(ini=some_date, end=some_date) |
Q(ini=other_date, fin=other_date))) I get This error:
active_during() takes exactly 3 arguments (2 given)
this is my code:
class OrderQuerySet(models.query.QuerySet):
def active_during(self, ini, end):
return self.filter(Q(register_date__lte = end) &
Q(Q(cancel_date__isnull=True) | Q(cancel_date__gte = ini
)))
class OrderManager(models.Manager):
# Custom managers with chainable filters.
# Based on: http://djangosnippets.org/snippets/562/
def __init__(self, qs_class=models.query.QuerySet):
super(OrderManager,self).__init__()
self.queryset_class = qs_class
def get_query_set(self):
return self.queryset_class(self.model)
def __getattr__(self, attr, *args):
try: return getattr(self.__class__, attr, *args)
except AttributeError: return getattr(self.get_query_set(), attr,
*args)
Seems to me that I need to define active_during() like:
def active_during(self, *args, **kwargs)
and make some custom stuff if a Q() object is passed to the method. But what
I need to do?
--
Marc
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