Steven Armstrong skrev:
> Chris Hoeppner wrote on 08/25/07 18:40:
>
>> Hi there!
>>
>> I was just wondering how to dynamically "or" together an indetermined
>> quantity of Q objects. They're constructed from a string like q=a+b+c,
>> which would get stiched together as "(Q(field=a) | Q(field=b) |
>> Q(field=c))". Any clue on how to do it with unknown parameters? It will
>> need to work with a+b, just like a+b+c+d+e+f+g+h... You get it :)
>>
>
> from django.db.models import Q
>
> fields = 'a+b+c+d+e'.split('+')
>
> query = Q(field=fields.pop(0))
> for field_value in fields:
> query = query | Q(field=field_value)
> mylist = MyModel.objects.filter(query)
>
Or, if you prefer a more functional style:
from django.db.models import Q
import operator
fields = 'a+b+c+d+e'.split('+')
query = reduce(operator.or_,(Q(field=field_value) for field_value in fields),
Q())
mylist = MyModel.objects.filter(query)
(only tested for syntax)
Nis
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