Perform a logical exclusive OR on a Django Q object
You could add an __xor__() method to Q that uses and/or/not to do the XOR logic.
from django.db.models import Qclass QQ: def __xor__(self, other): not_self = self.clone() not_other = other.clone() not_self.negate() not_other.negate() x = self & not_other y = not_self & other return x | yQ.__bases__ += (QQ, )After doing this I was able to Q(...) ^ Q(...) in a filter() call.
Foobar.objects.filter(Q(blah=1) ^ Q(bar=2)) Which means the original attempt no longer throws an unsupported operand exception.
limit_choices_to=reduce( operator.xor, map(query_group_lkup, getattr(settings, 'AUTHORIZED_AUTHORS', '')) )Tested in Django 1.6.1 on Python 2.7.5