223 lines
7.4 KiB
Python
223 lines
7.4 KiB
Python
from datetime import datetime
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from operator import attrgetter
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from django.db.models import Q
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from django.test import TestCase
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from .models import Article
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class OrLookupsTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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cls.a1 = Article.objects.create(
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headline="Hello", pub_date=datetime(2005, 11, 27)
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).pk
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cls.a2 = Article.objects.create(
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headline="Goodbye", pub_date=datetime(2005, 11, 28)
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).pk
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cls.a3 = Article.objects.create(
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headline="Hello and goodbye", pub_date=datetime(2005, 11, 29)
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).pk
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def test_filter_or(self):
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self.assertQuerySetEqual(
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(
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Article.objects.filter(headline__startswith="Hello")
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| Article.objects.filter(headline__startswith="Goodbye")
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),
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["Hello", "Goodbye", "Hello and goodbye"],
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attrgetter("headline"),
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)
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self.assertQuerySetEqual(
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Article.objects.filter(headline__contains="Hello")
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| Article.objects.filter(headline__contains="bye"),
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["Hello", "Goodbye", "Hello and goodbye"],
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attrgetter("headline"),
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)
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self.assertQuerySetEqual(
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Article.objects.filter(headline__iexact="Hello")
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| Article.objects.filter(headline__contains="ood"),
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["Hello", "Goodbye", "Hello and goodbye"],
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attrgetter("headline"),
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)
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self.assertQuerySetEqual(
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Article.objects.filter(
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Q(headline__startswith="Hello") | Q(headline__startswith="Goodbye")
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),
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["Hello", "Goodbye", "Hello and goodbye"],
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attrgetter("headline"),
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)
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def test_stages(self):
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# You can shorten this syntax with code like the following, which is
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# especially useful if building the query in stages:
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articles = Article.objects.all()
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self.assertQuerySetEqual(
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articles.filter(headline__startswith="Hello")
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& articles.filter(headline__startswith="Goodbye"),
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[],
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)
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self.assertQuerySetEqual(
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articles.filter(headline__startswith="Hello")
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& articles.filter(headline__contains="bye"),
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["Hello and goodbye"],
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attrgetter("headline"),
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)
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def test_pk_q(self):
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self.assertQuerySetEqual(
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Article.objects.filter(Q(pk=self.a1) | Q(pk=self.a2)),
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["Hello", "Goodbye"],
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attrgetter("headline"),
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)
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self.assertQuerySetEqual(
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Article.objects.filter(Q(pk=self.a1) | Q(pk=self.a2) | Q(pk=self.a3)),
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["Hello", "Goodbye", "Hello and goodbye"],
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attrgetter("headline"),
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)
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def test_pk_in(self):
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self.assertQuerySetEqual(
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Article.objects.filter(pk__in=[self.a1, self.a2, self.a3]),
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["Hello", "Goodbye", "Hello and goodbye"],
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attrgetter("headline"),
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)
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self.assertQuerySetEqual(
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Article.objects.filter(pk__in=(self.a1, self.a2, self.a3)),
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["Hello", "Goodbye", "Hello and goodbye"],
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attrgetter("headline"),
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)
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self.assertQuerySetEqual(
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Article.objects.filter(pk__in=[self.a1, self.a2, self.a3, 40000]),
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["Hello", "Goodbye", "Hello and goodbye"],
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attrgetter("headline"),
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)
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def test_q_repr(self):
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or_expr = Q(baz=Article(headline="Foö"))
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self.assertEqual(repr(or_expr), "<Q: (AND: ('baz', <Article: Foö>))>")
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negated_or = ~Q(baz=Article(headline="Foö"))
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self.assertEqual(repr(negated_or), "<Q: (NOT (AND: ('baz', <Article: Foö>)))>")
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def test_q_negated(self):
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# Q objects can be negated
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self.assertQuerySetEqual(
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Article.objects.filter(Q(pk=self.a1) | ~Q(pk=self.a2)),
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["Hello", "Hello and goodbye"],
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attrgetter("headline"),
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)
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self.assertQuerySetEqual(
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Article.objects.filter(~Q(pk=self.a1) & ~Q(pk=self.a2)),
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["Hello and goodbye"],
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attrgetter("headline"),
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)
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# This allows for more complex queries than filter() and exclude()
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# alone would allow
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self.assertQuerySetEqual(
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Article.objects.filter(Q(pk=self.a1) & (~Q(pk=self.a2) | Q(pk=self.a3))),
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["Hello"],
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attrgetter("headline"),
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)
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def test_complex_filter(self):
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# The 'complex_filter' method supports framework features such as
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# 'limit_choices_to' which normally take a single dictionary of lookup
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# arguments but need to support arbitrary queries via Q objects too.
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self.assertQuerySetEqual(
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Article.objects.complex_filter({"pk": self.a1}),
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["Hello"],
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attrgetter("headline"),
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)
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self.assertQuerySetEqual(
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Article.objects.complex_filter(Q(pk=self.a1) | Q(pk=self.a2)),
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["Hello", "Goodbye"],
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attrgetter("headline"),
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)
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def test_empty_in(self):
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# Passing "in" an empty list returns no results ...
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self.assertQuerySetEqual(Article.objects.filter(pk__in=[]), [])
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# ... but can return results if we OR it with another query.
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self.assertQuerySetEqual(
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Article.objects.filter(Q(pk__in=[]) | Q(headline__icontains="goodbye")),
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["Goodbye", "Hello and goodbye"],
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attrgetter("headline"),
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)
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def test_q_and(self):
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# Q arg objects are ANDed
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self.assertQuerySetEqual(
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Article.objects.filter(
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Q(headline__startswith="Hello"), Q(headline__contains="bye")
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),
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["Hello and goodbye"],
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attrgetter("headline"),
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)
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# Q arg AND order is irrelevant
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self.assertQuerySetEqual(
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Article.objects.filter(
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Q(headline__contains="bye"), headline__startswith="Hello"
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),
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["Hello and goodbye"],
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attrgetter("headline"),
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)
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self.assertQuerySetEqual(
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Article.objects.filter(
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Q(headline__startswith="Hello") & Q(headline__startswith="Goodbye")
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),
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[],
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)
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def test_q_exclude(self):
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self.assertQuerySetEqual(
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Article.objects.exclude(Q(headline__startswith="Hello")),
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["Goodbye"],
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attrgetter("headline"),
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)
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def test_other_arg_queries(self):
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# Try some arg queries with operations other than filter.
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self.assertEqual(
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Article.objects.get(
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Q(headline__startswith="Hello"), Q(headline__contains="bye")
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).headline,
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"Hello and goodbye",
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)
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self.assertEqual(
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Article.objects.filter(
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Q(headline__startswith="Hello") | Q(headline__contains="bye")
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).count(),
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3,
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)
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self.assertSequenceEqual(
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Article.objects.filter(
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Q(headline__startswith="Hello"), Q(headline__contains="bye")
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).values(),
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[
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{
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"headline": "Hello and goodbye",
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"id": self.a3,
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"pub_date": datetime(2005, 11, 29),
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},
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],
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)
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self.assertEqual(
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Article.objects.filter(Q(headline__startswith="Hello")).in_bulk(
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[self.a1, self.a2]
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),
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{self.a1: Article.objects.get(pk=self.a1)},
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)
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