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from django.db.models import Q
from django.test import TestCase
from .models import Number
class XorLookupsTests(TestCase):
@classmethod
def setUpTestData(cls):
cls.numbers = [Number.objects.create(num=i) for i in range(10)]
def test_filter(self):
self.assertCountEqual(
Number.objects.filter(num__lte=7) ^ Number.objects.filter(num__gte=3),
self.numbers[:3] + self.numbers[8:],
)
self.assertCountEqual(
Number.objects.filter(Q(num__lte=7) ^ Q(num__gte=3)),
self.numbers[:3] + self.numbers[8:],
)
def test_filter_multiple(self):
qs = Number.objects.filter(
Q(num__gte=1)
^ Q(num__gte=3)
^ Q(num__gte=5)
^ Q(num__gte=7)
^ Q(num__gte=9)
)
self.assertCountEqual(
qs,
self.numbers[1:3] + self.numbers[5:7] + self.numbers[9:],
)
self.assertCountEqual(
qs.values_list("num", flat=True),
[
i
for i in range(10)
if (i >= 1) ^ (i >= 3) ^ (i >= 5) ^ (i >= 7) ^ (i >= 9)
],
)
def test_filter_negated(self):
self.assertCountEqual(
Number.objects.filter(Q(num__lte=7) ^ ~Q(num__lt=3)),
self.numbers[:3] + self.numbers[8:],
)
self.assertCountEqual(
Number.objects.filter(~Q(num__gt=7) ^ ~Q(num__lt=3)),
self.numbers[:3] + self.numbers[8:],
)
self.assertCountEqual(
Number.objects.filter(Q(num__lte=7) ^ ~Q(num__lt=3) ^ Q(num__lte=1)),
[self.numbers[2]] + self.numbers[8:],
)
self.assertCountEqual(
Number.objects.filter(~(Q(num__lte=7) ^ ~Q(num__lt=3) ^ Q(num__lte=1))),
self.numbers[:2] + self.numbers[3:8],
)
def test_exclude(self):
self.assertCountEqual(
Number.objects.exclude(Q(num__lte=7) ^ Q(num__gte=3)),
self.numbers[3:8],
)
def test_stages(self):
numbers = Number.objects.all()
self.assertSequenceEqual(
numbers.filter(num__gte=0) ^ numbers.filter(num__lte=11),
[],
)
self.assertSequenceEqual(
numbers.filter(num__gt=0) ^ numbers.filter(num__lt=11),
[self.numbers[0]],
)
def test_pk_q(self):
self.assertCountEqual(
Number.objects.filter(Q(pk=self.numbers[0].pk) ^ Q(pk=self.numbers[1].pk)),
self.numbers[:2],
)
def test_empty_in(self):
self.assertCountEqual(
Number.objects.filter(Q(pk__in=[]) ^ Q(num__gte=5)),
self.numbers[5:],
)
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