1460 lines
56 KiB
Python
1460 lines
56 KiB
Python
import collections.abc
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from datetime import datetime
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from math import ceil
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from operator import attrgetter
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from unittest import skipUnless
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from django.core.exceptions import FieldError
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from django.db import connection, models
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from django.db.models import (
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BooleanField,
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Case,
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Exists,
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ExpressionWrapper,
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F,
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Max,
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OuterRef,
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Q,
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Subquery,
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Value,
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When,
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)
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from django.db.models.functions import Cast, Substr
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from django.db.models.lookups import (
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Exact,
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GreaterThan,
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GreaterThanOrEqual,
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IsNull,
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LessThan,
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LessThanOrEqual,
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)
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from django.test import TestCase, skipUnlessDBFeature
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from django.test.utils import isolate_apps
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from .models import (
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Article,
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Author,
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Freebie,
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Game,
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IsNullWithNoneAsRHS,
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Player,
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Product,
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Season,
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Stock,
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Tag,
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)
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class LookupTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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# Create a few Authors.
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cls.au1 = Author.objects.create(name="Author 1", alias="a1")
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cls.au2 = Author.objects.create(name="Author 2", alias="a2")
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# Create a few Articles.
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cls.a1 = Article.objects.create(
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headline="Article 1",
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pub_date=datetime(2005, 7, 26),
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author=cls.au1,
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slug="a1",
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)
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cls.a2 = Article.objects.create(
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headline="Article 2",
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pub_date=datetime(2005, 7, 27),
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author=cls.au1,
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slug="a2",
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)
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cls.a3 = Article.objects.create(
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headline="Article 3",
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pub_date=datetime(2005, 7, 27),
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author=cls.au1,
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slug="a3",
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)
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cls.a4 = Article.objects.create(
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headline="Article 4",
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pub_date=datetime(2005, 7, 28),
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author=cls.au1,
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slug="a4",
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)
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cls.a5 = Article.objects.create(
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headline="Article 5",
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pub_date=datetime(2005, 8, 1, 9, 0),
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author=cls.au2,
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slug="a5",
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)
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cls.a6 = Article.objects.create(
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headline="Article 6",
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pub_date=datetime(2005, 8, 1, 8, 0),
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author=cls.au2,
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slug="a6",
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)
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cls.a7 = Article.objects.create(
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headline="Article 7",
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pub_date=datetime(2005, 7, 27),
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author=cls.au2,
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slug="a7",
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)
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# Create a few Tags.
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cls.t1 = Tag.objects.create(name="Tag 1")
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cls.t1.articles.add(cls.a1, cls.a2, cls.a3)
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cls.t2 = Tag.objects.create(name="Tag 2")
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cls.t2.articles.add(cls.a3, cls.a4, cls.a5)
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cls.t3 = Tag.objects.create(name="Tag 3")
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cls.t3.articles.add(cls.a5, cls.a6, cls.a7)
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def test_exists(self):
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# We can use .exists() to check that there are some
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self.assertTrue(Article.objects.exists())
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for a in Article.objects.all():
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a.delete()
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# There should be none now!
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self.assertFalse(Article.objects.exists())
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def test_lookup_int_as_str(self):
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# Integer value can be queried using string
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self.assertSequenceEqual(
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Article.objects.filter(id__iexact=str(self.a1.id)),
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[self.a1],
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)
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@skipUnlessDBFeature("supports_date_lookup_using_string")
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def test_lookup_date_as_str(self):
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# A date lookup can be performed using a string search
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self.assertSequenceEqual(
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Article.objects.filter(pub_date__startswith="2005"),
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[self.a5, self.a6, self.a4, self.a2, self.a3, self.a7, self.a1],
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)
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def test_iterator(self):
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# Each QuerySet gets iterator(), which is a generator that "lazily"
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# returns results using database-level iteration.
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self.assertIsInstance(Article.objects.iterator(), collections.abc.Iterator)
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self.assertQuerysetEqual(
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Article.objects.iterator(),
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[
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"Article 5",
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"Article 6",
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"Article 4",
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"Article 2",
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"Article 3",
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"Article 7",
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"Article 1",
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],
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transform=attrgetter("headline"),
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)
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# iterator() can be used on any QuerySet.
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self.assertQuerysetEqual(
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Article.objects.filter(headline__endswith="4").iterator(),
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["Article 4"],
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transform=attrgetter("headline"),
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)
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def test_count(self):
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# count() returns the number of objects matching search criteria.
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self.assertEqual(Article.objects.count(), 7)
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self.assertEqual(
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Article.objects.filter(pub_date__exact=datetime(2005, 7, 27)).count(), 3
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)
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self.assertEqual(
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Article.objects.filter(headline__startswith="Blah blah").count(), 0
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)
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# count() should respect sliced query sets.
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articles = Article.objects.all()
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self.assertEqual(articles.count(), 7)
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self.assertEqual(articles[:4].count(), 4)
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self.assertEqual(articles[1:100].count(), 6)
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self.assertEqual(articles[10:100].count(), 0)
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# Date and date/time lookups can also be done with strings.
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self.assertEqual(
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Article.objects.filter(pub_date__exact="2005-07-27 00:00:00").count(), 3
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)
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def test_in_bulk(self):
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# in_bulk() takes a list of IDs and returns a dictionary mapping IDs to objects.
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arts = Article.objects.in_bulk([self.a1.id, self.a2.id])
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self.assertEqual(arts[self.a1.id], self.a1)
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self.assertEqual(arts[self.a2.id], self.a2)
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self.assertEqual(
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Article.objects.in_bulk(),
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{
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self.a1.id: self.a1,
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self.a2.id: self.a2,
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self.a3.id: self.a3,
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self.a4.id: self.a4,
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self.a5.id: self.a5,
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self.a6.id: self.a6,
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self.a7.id: self.a7,
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},
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)
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self.assertEqual(Article.objects.in_bulk([self.a3.id]), {self.a3.id: self.a3})
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self.assertEqual(Article.objects.in_bulk({self.a3.id}), {self.a3.id: self.a3})
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self.assertEqual(
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Article.objects.in_bulk(frozenset([self.a3.id])), {self.a3.id: self.a3}
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)
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self.assertEqual(Article.objects.in_bulk((self.a3.id,)), {self.a3.id: self.a3})
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self.assertEqual(Article.objects.in_bulk([1000]), {})
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self.assertEqual(Article.objects.in_bulk([]), {})
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self.assertEqual(
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Article.objects.in_bulk(iter([self.a1.id])), {self.a1.id: self.a1}
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)
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self.assertEqual(Article.objects.in_bulk(iter([])), {})
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with self.assertRaises(TypeError):
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Article.objects.in_bulk(headline__startswith="Blah")
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def test_in_bulk_lots_of_ids(self):
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test_range = 2000
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max_query_params = connection.features.max_query_params
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expected_num_queries = (
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ceil(test_range / max_query_params) if max_query_params else 1
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)
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Author.objects.bulk_create(
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[Author() for i in range(test_range - Author.objects.count())]
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)
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authors = {author.pk: author for author in Author.objects.all()}
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with self.assertNumQueries(expected_num_queries):
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self.assertEqual(Author.objects.in_bulk(authors), authors)
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def test_in_bulk_with_field(self):
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self.assertEqual(
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Article.objects.in_bulk(
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[self.a1.slug, self.a2.slug, self.a3.slug], field_name="slug"
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),
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{
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self.a1.slug: self.a1,
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self.a2.slug: self.a2,
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self.a3.slug: self.a3,
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},
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)
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def test_in_bulk_meta_constraint(self):
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season_2011 = Season.objects.create(year=2011)
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season_2012 = Season.objects.create(year=2012)
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Season.objects.create(year=2013)
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self.assertEqual(
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Season.objects.in_bulk(
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[season_2011.year, season_2012.year],
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field_name="year",
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),
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{season_2011.year: season_2011, season_2012.year: season_2012},
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)
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def test_in_bulk_non_unique_field(self):
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msg = "in_bulk()'s field_name must be a unique field but 'author' isn't."
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with self.assertRaisesMessage(ValueError, msg):
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Article.objects.in_bulk([self.au1], field_name="author")
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@skipUnlessDBFeature("can_distinct_on_fields")
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def test_in_bulk_distinct_field(self):
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self.assertEqual(
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Article.objects.order_by("headline")
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.distinct("headline")
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.in_bulk(
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[self.a1.headline, self.a5.headline],
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field_name="headline",
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),
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{self.a1.headline: self.a1, self.a5.headline: self.a5},
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)
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@skipUnlessDBFeature("can_distinct_on_fields")
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def test_in_bulk_multiple_distinct_field(self):
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msg = "in_bulk()'s field_name must be a unique field but 'pub_date' isn't."
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with self.assertRaisesMessage(ValueError, msg):
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Article.objects.order_by("headline", "pub_date").distinct(
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"headline",
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"pub_date",
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).in_bulk(field_name="pub_date")
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@isolate_apps("lookup")
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def test_in_bulk_non_unique_meta_constaint(self):
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class Model(models.Model):
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ean = models.CharField(max_length=100)
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brand = models.CharField(max_length=100)
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name = models.CharField(max_length=80)
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class Meta:
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constraints = [
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models.UniqueConstraint(
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fields=["ean"],
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name="partial_ean_unique",
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condition=models.Q(is_active=True),
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),
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models.UniqueConstraint(
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fields=["brand", "name"],
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name="together_brand_name_unique",
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),
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]
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msg = "in_bulk()'s field_name must be a unique field but '%s' isn't."
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for field_name in ["brand", "ean"]:
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with self.subTest(field_name=field_name):
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with self.assertRaisesMessage(ValueError, msg % field_name):
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Model.objects.in_bulk(field_name=field_name)
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def test_in_bulk_sliced_queryset(self):
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msg = "Cannot use 'limit' or 'offset' with in_bulk()."
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with self.assertRaisesMessage(TypeError, msg):
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Article.objects.all()[0:5].in_bulk([self.a1.id, self.a2.id])
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def test_values(self):
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# values() returns a list of dictionaries instead of object instances --
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# and you can specify which fields you want to retrieve.
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self.assertSequenceEqual(
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Article.objects.values("headline"),
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[
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{"headline": "Article 5"},
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{"headline": "Article 6"},
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{"headline": "Article 4"},
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{"headline": "Article 2"},
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{"headline": "Article 3"},
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{"headline": "Article 7"},
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{"headline": "Article 1"},
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],
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)
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self.assertSequenceEqual(
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Article.objects.filter(pub_date__exact=datetime(2005, 7, 27)).values("id"),
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[{"id": self.a2.id}, {"id": self.a3.id}, {"id": self.a7.id}],
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)
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self.assertSequenceEqual(
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Article.objects.values("id", "headline"),
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[
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{"id": self.a5.id, "headline": "Article 5"},
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{"id": self.a6.id, "headline": "Article 6"},
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{"id": self.a4.id, "headline": "Article 4"},
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{"id": self.a2.id, "headline": "Article 2"},
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{"id": self.a3.id, "headline": "Article 3"},
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{"id": self.a7.id, "headline": "Article 7"},
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{"id": self.a1.id, "headline": "Article 1"},
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],
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)
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# You can use values() with iterator() for memory savings,
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# because iterator() uses database-level iteration.
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self.assertSequenceEqual(
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list(Article.objects.values("id", "headline").iterator()),
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[
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{"headline": "Article 5", "id": self.a5.id},
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{"headline": "Article 6", "id": self.a6.id},
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{"headline": "Article 4", "id": self.a4.id},
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{"headline": "Article 2", "id": self.a2.id},
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{"headline": "Article 3", "id": self.a3.id},
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{"headline": "Article 7", "id": self.a7.id},
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{"headline": "Article 1", "id": self.a1.id},
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],
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)
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# The values() method works with "extra" fields specified in extra(select).
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self.assertSequenceEqual(
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Article.objects.extra(select={"id_plus_one": "id + 1"}).values(
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"id", "id_plus_one"
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),
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[
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{"id": self.a5.id, "id_plus_one": self.a5.id + 1},
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{"id": self.a6.id, "id_plus_one": self.a6.id + 1},
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{"id": self.a4.id, "id_plus_one": self.a4.id + 1},
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{"id": self.a2.id, "id_plus_one": self.a2.id + 1},
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{"id": self.a3.id, "id_plus_one": self.a3.id + 1},
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{"id": self.a7.id, "id_plus_one": self.a7.id + 1},
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{"id": self.a1.id, "id_plus_one": self.a1.id + 1},
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],
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)
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data = {
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"id_plus_one": "id+1",
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"id_plus_two": "id+2",
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"id_plus_three": "id+3",
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"id_plus_four": "id+4",
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"id_plus_five": "id+5",
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"id_plus_six": "id+6",
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"id_plus_seven": "id+7",
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"id_plus_eight": "id+8",
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}
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self.assertSequenceEqual(
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Article.objects.filter(id=self.a1.id).extra(select=data).values(*data),
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[
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{
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"id_plus_one": self.a1.id + 1,
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"id_plus_two": self.a1.id + 2,
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"id_plus_three": self.a1.id + 3,
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"id_plus_four": self.a1.id + 4,
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"id_plus_five": self.a1.id + 5,
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"id_plus_six": self.a1.id + 6,
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"id_plus_seven": self.a1.id + 7,
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"id_plus_eight": self.a1.id + 8,
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}
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],
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)
|
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# You can specify fields from forward and reverse relations, just like filter().
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self.assertSequenceEqual(
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Article.objects.values("headline", "author__name"),
|
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[
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{"headline": self.a5.headline, "author__name": self.au2.name},
|
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{"headline": self.a6.headline, "author__name": self.au2.name},
|
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{"headline": self.a4.headline, "author__name": self.au1.name},
|
|
{"headline": self.a2.headline, "author__name": self.au1.name},
|
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{"headline": self.a3.headline, "author__name": self.au1.name},
|
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{"headline": self.a7.headline, "author__name": self.au2.name},
|
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{"headline": self.a1.headline, "author__name": self.au1.name},
|
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],
|
|
)
|
|
self.assertSequenceEqual(
|
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Author.objects.values("name", "article__headline").order_by(
|
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"name", "article__headline"
|
|
),
|
|
[
|
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{"name": self.au1.name, "article__headline": self.a1.headline},
|
|
{"name": self.au1.name, "article__headline": self.a2.headline},
|
|
{"name": self.au1.name, "article__headline": self.a3.headline},
|
|
{"name": self.au1.name, "article__headline": self.a4.headline},
|
|
{"name": self.au2.name, "article__headline": self.a5.headline},
|
|
{"name": self.au2.name, "article__headline": self.a6.headline},
|
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{"name": self.au2.name, "article__headline": self.a7.headline},
|
|
],
|
|
)
|
|
self.assertSequenceEqual(
|
|
(
|
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Author.objects.values(
|
|
"name", "article__headline", "article__tag__name"
|
|
).order_by("name", "article__headline", "article__tag__name")
|
|
),
|
|
[
|
|
{
|
|
"name": self.au1.name,
|
|
"article__headline": self.a1.headline,
|
|
"article__tag__name": self.t1.name,
|
|
},
|
|
{
|
|
"name": self.au1.name,
|
|
"article__headline": self.a2.headline,
|
|
"article__tag__name": self.t1.name,
|
|
},
|
|
{
|
|
"name": self.au1.name,
|
|
"article__headline": self.a3.headline,
|
|
"article__tag__name": self.t1.name,
|
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},
|
|
{
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|
"name": self.au1.name,
|
|
"article__headline": self.a3.headline,
|
|
"article__tag__name": self.t2.name,
|
|
},
|
|
{
|
|
"name": self.au1.name,
|
|
"article__headline": self.a4.headline,
|
|
"article__tag__name": self.t2.name,
|
|
},
|
|
{
|
|
"name": self.au2.name,
|
|
"article__headline": self.a5.headline,
|
|
"article__tag__name": self.t2.name,
|
|
},
|
|
{
|
|
"name": self.au2.name,
|
|
"article__headline": self.a5.headline,
|
|
"article__tag__name": self.t3.name,
|
|
},
|
|
{
|
|
"name": self.au2.name,
|
|
"article__headline": self.a6.headline,
|
|
"article__tag__name": self.t3.name,
|
|
},
|
|
{
|
|
"name": self.au2.name,
|
|
"article__headline": self.a7.headline,
|
|
"article__tag__name": self.t3.name,
|
|
},
|
|
],
|
|
)
|
|
# However, an exception FieldDoesNotExist will be thrown if you specify
|
|
# a nonexistent field name in values() (a field that is neither in the
|
|
# model nor in extra(select)).
|
|
msg = (
|
|
"Cannot resolve keyword 'id_plus_two' into field. Choices are: "
|
|
"author, author_id, headline, id, id_plus_one, pub_date, slug, tag"
|
|
)
|
|
with self.assertRaisesMessage(FieldError, msg):
|
|
Article.objects.extra(select={"id_plus_one": "id + 1"}).values(
|
|
"id", "id_plus_two"
|
|
)
|
|
# If you don't specify field names to values(), all are returned.
|
|
self.assertSequenceEqual(
|
|
Article.objects.filter(id=self.a5.id).values(),
|
|
[
|
|
{
|
|
"id": self.a5.id,
|
|
"author_id": self.au2.id,
|
|
"headline": "Article 5",
|
|
"pub_date": datetime(2005, 8, 1, 9, 0),
|
|
"slug": "a5",
|
|
}
|
|
],
|
|
)
|
|
|
|
def test_values_list(self):
|
|
# values_list() is similar to values(), except that the results are
|
|
# returned as a list of tuples, rather than a list of dictionaries.
|
|
# Within each tuple, the order of the elements is the same as the order
|
|
# of fields in the values_list() call.
|
|
self.assertSequenceEqual(
|
|
Article.objects.values_list("headline"),
|
|
[
|
|
("Article 5",),
|
|
("Article 6",),
|
|
("Article 4",),
|
|
("Article 2",),
|
|
("Article 3",),
|
|
("Article 7",),
|
|
("Article 1",),
|
|
],
|
|
)
|
|
self.assertSequenceEqual(
|
|
Article.objects.values_list("id").order_by("id"),
|
|
[
|
|
(self.a1.id,),
|
|
(self.a2.id,),
|
|
(self.a3.id,),
|
|
(self.a4.id,),
|
|
(self.a5.id,),
|
|
(self.a6.id,),
|
|
(self.a7.id,),
|
|
],
|
|
)
|
|
self.assertSequenceEqual(
|
|
Article.objects.values_list("id", flat=True).order_by("id"),
|
|
[
|
|
self.a1.id,
|
|
self.a2.id,
|
|
self.a3.id,
|
|
self.a4.id,
|
|
self.a5.id,
|
|
self.a6.id,
|
|
self.a7.id,
|
|
],
|
|
)
|
|
self.assertSequenceEqual(
|
|
Article.objects.extra(select={"id_plus_one": "id+1"})
|
|
.order_by("id")
|
|
.values_list("id"),
|
|
[
|
|
(self.a1.id,),
|
|
(self.a2.id,),
|
|
(self.a3.id,),
|
|
(self.a4.id,),
|
|
(self.a5.id,),
|
|
(self.a6.id,),
|
|
(self.a7.id,),
|
|
],
|
|
)
|
|
self.assertSequenceEqual(
|
|
Article.objects.extra(select={"id_plus_one": "id+1"})
|
|
.order_by("id")
|
|
.values_list("id_plus_one", "id"),
|
|
[
|
|
(self.a1.id + 1, self.a1.id),
|
|
(self.a2.id + 1, self.a2.id),
|
|
(self.a3.id + 1, self.a3.id),
|
|
(self.a4.id + 1, self.a4.id),
|
|
(self.a5.id + 1, self.a5.id),
|
|
(self.a6.id + 1, self.a6.id),
|
|
(self.a7.id + 1, self.a7.id),
|
|
],
|
|
)
|
|
self.assertSequenceEqual(
|
|
Article.objects.extra(select={"id_plus_one": "id+1"})
|
|
.order_by("id")
|
|
.values_list("id", "id_plus_one"),
|
|
[
|
|
(self.a1.id, self.a1.id + 1),
|
|
(self.a2.id, self.a2.id + 1),
|
|
(self.a3.id, self.a3.id + 1),
|
|
(self.a4.id, self.a4.id + 1),
|
|
(self.a5.id, self.a5.id + 1),
|
|
(self.a6.id, self.a6.id + 1),
|
|
(self.a7.id, self.a7.id + 1),
|
|
],
|
|
)
|
|
args = ("name", "article__headline", "article__tag__name")
|
|
self.assertSequenceEqual(
|
|
Author.objects.values_list(*args).order_by(*args),
|
|
[
|
|
(self.au1.name, self.a1.headline, self.t1.name),
|
|
(self.au1.name, self.a2.headline, self.t1.name),
|
|
(self.au1.name, self.a3.headline, self.t1.name),
|
|
(self.au1.name, self.a3.headline, self.t2.name),
|
|
(self.au1.name, self.a4.headline, self.t2.name),
|
|
(self.au2.name, self.a5.headline, self.t2.name),
|
|
(self.au2.name, self.a5.headline, self.t3.name),
|
|
(self.au2.name, self.a6.headline, self.t3.name),
|
|
(self.au2.name, self.a7.headline, self.t3.name),
|
|
],
|
|
)
|
|
with self.assertRaises(TypeError):
|
|
Article.objects.values_list("id", "headline", flat=True)
|
|
|
|
def test_get_next_previous_by(self):
|
|
# Every DateField and DateTimeField creates get_next_by_FOO() and
|
|
# get_previous_by_FOO() methods. In the case of identical date values,
|
|
# these methods will use the ID as a fallback check. This guarantees
|
|
# that no records are skipped or duplicated.
|
|
self.assertEqual(repr(self.a1.get_next_by_pub_date()), "<Article: Article 2>")
|
|
self.assertEqual(repr(self.a2.get_next_by_pub_date()), "<Article: Article 3>")
|
|
self.assertEqual(
|
|
repr(self.a2.get_next_by_pub_date(headline__endswith="6")),
|
|
"<Article: Article 6>",
|
|
)
|
|
self.assertEqual(repr(self.a3.get_next_by_pub_date()), "<Article: Article 7>")
|
|
self.assertEqual(repr(self.a4.get_next_by_pub_date()), "<Article: Article 6>")
|
|
with self.assertRaises(Article.DoesNotExist):
|
|
self.a5.get_next_by_pub_date()
|
|
self.assertEqual(repr(self.a6.get_next_by_pub_date()), "<Article: Article 5>")
|
|
self.assertEqual(repr(self.a7.get_next_by_pub_date()), "<Article: Article 4>")
|
|
|
|
self.assertEqual(
|
|
repr(self.a7.get_previous_by_pub_date()), "<Article: Article 3>"
|
|
)
|
|
self.assertEqual(
|
|
repr(self.a6.get_previous_by_pub_date()), "<Article: Article 4>"
|
|
)
|
|
self.assertEqual(
|
|
repr(self.a5.get_previous_by_pub_date()), "<Article: Article 6>"
|
|
)
|
|
self.assertEqual(
|
|
repr(self.a4.get_previous_by_pub_date()), "<Article: Article 7>"
|
|
)
|
|
self.assertEqual(
|
|
repr(self.a3.get_previous_by_pub_date()), "<Article: Article 2>"
|
|
)
|
|
self.assertEqual(
|
|
repr(self.a2.get_previous_by_pub_date()), "<Article: Article 1>"
|
|
)
|
|
|
|
def test_escaping(self):
|
|
# Underscores, percent signs and backslashes have special meaning in the
|
|
# underlying SQL code, but Django handles the quoting of them automatically.
|
|
a8 = Article.objects.create(
|
|
headline="Article_ with underscore", pub_date=datetime(2005, 11, 20)
|
|
)
|
|
|
|
self.assertSequenceEqual(
|
|
Article.objects.filter(headline__startswith="Article"),
|
|
[a8, self.a5, self.a6, self.a4, self.a2, self.a3, self.a7, self.a1],
|
|
)
|
|
self.assertSequenceEqual(
|
|
Article.objects.filter(headline__startswith="Article_"),
|
|
[a8],
|
|
)
|
|
a9 = Article.objects.create(
|
|
headline="Article% with percent sign", pub_date=datetime(2005, 11, 21)
|
|
)
|
|
self.assertSequenceEqual(
|
|
Article.objects.filter(headline__startswith="Article"),
|
|
[a9, a8, self.a5, self.a6, self.a4, self.a2, self.a3, self.a7, self.a1],
|
|
)
|
|
self.assertSequenceEqual(
|
|
Article.objects.filter(headline__startswith="Article%"),
|
|
[a9],
|
|
)
|
|
a10 = Article.objects.create(
|
|
headline="Article with \\ backslash", pub_date=datetime(2005, 11, 22)
|
|
)
|
|
self.assertSequenceEqual(
|
|
Article.objects.filter(headline__contains="\\"),
|
|
[a10],
|
|
)
|
|
|
|
def test_exclude(self):
|
|
pub_date = datetime(2005, 11, 20)
|
|
a8 = Article.objects.create(
|
|
headline="Article_ with underscore", pub_date=pub_date
|
|
)
|
|
a9 = Article.objects.create(
|
|
headline="Article% with percent sign", pub_date=pub_date
|
|
)
|
|
a10 = Article.objects.create(
|
|
headline="Article with \\ backslash", pub_date=pub_date
|
|
)
|
|
# exclude() is the opposite of filter() when doing lookups:
|
|
self.assertSequenceEqual(
|
|
Article.objects.filter(headline__contains="Article").exclude(
|
|
headline__contains="with"
|
|
),
|
|
[self.a5, self.a6, self.a4, self.a2, self.a3, self.a7, self.a1],
|
|
)
|
|
self.assertSequenceEqual(
|
|
Article.objects.exclude(headline__startswith="Article_"),
|
|
[a10, a9, self.a5, self.a6, self.a4, self.a2, self.a3, self.a7, self.a1],
|
|
)
|
|
self.assertSequenceEqual(
|
|
Article.objects.exclude(headline="Article 7"),
|
|
[a10, a9, a8, self.a5, self.a6, self.a4, self.a2, self.a3, self.a1],
|
|
)
|
|
|
|
def test_none(self):
|
|
# none() returns a QuerySet that behaves like any other QuerySet object
|
|
self.assertQuerysetEqual(Article.objects.none(), [])
|
|
self.assertQuerysetEqual(
|
|
Article.objects.none().filter(headline__startswith="Article"), []
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__startswith="Article").none(), []
|
|
)
|
|
self.assertEqual(Article.objects.none().count(), 0)
|
|
self.assertEqual(
|
|
Article.objects.none().update(headline="This should not take effect"), 0
|
|
)
|
|
self.assertQuerysetEqual(Article.objects.none().iterator(), [])
|
|
|
|
def test_in(self):
|
|
self.assertSequenceEqual(
|
|
Article.objects.exclude(id__in=[]),
|
|
[self.a5, self.a6, self.a4, self.a2, self.a3, self.a7, self.a1],
|
|
)
|
|
|
|
def test_in_empty_list(self):
|
|
self.assertSequenceEqual(Article.objects.filter(id__in=[]), [])
|
|
|
|
def test_in_different_database(self):
|
|
with self.assertRaisesMessage(
|
|
ValueError,
|
|
"Subqueries aren't allowed across different databases. Force the "
|
|
"inner query to be evaluated using `list(inner_query)`.",
|
|
):
|
|
list(Article.objects.filter(id__in=Article.objects.using("other").all()))
|
|
|
|
def test_in_keeps_value_ordering(self):
|
|
query = (
|
|
Article.objects.filter(slug__in=["a%d" % i for i in range(1, 8)])
|
|
.values("pk")
|
|
.query
|
|
)
|
|
self.assertIn(" IN (a1, a2, a3, a4, a5, a6, a7) ", str(query))
|
|
|
|
def test_in_ignore_none(self):
|
|
with self.assertNumQueries(1) as ctx:
|
|
self.assertSequenceEqual(
|
|
Article.objects.filter(id__in=[None, self.a1.id]),
|
|
[self.a1],
|
|
)
|
|
sql = ctx.captured_queries[0]["sql"]
|
|
self.assertIn("IN (%s)" % self.a1.pk, sql)
|
|
|
|
def test_in_ignore_solo_none(self):
|
|
with self.assertNumQueries(0):
|
|
self.assertSequenceEqual(Article.objects.filter(id__in=[None]), [])
|
|
|
|
def test_in_ignore_none_with_unhashable_items(self):
|
|
class UnhashableInt(int):
|
|
__hash__ = None
|
|
|
|
with self.assertNumQueries(1) as ctx:
|
|
self.assertSequenceEqual(
|
|
Article.objects.filter(id__in=[None, UnhashableInt(self.a1.id)]),
|
|
[self.a1],
|
|
)
|
|
sql = ctx.captured_queries[0]["sql"]
|
|
self.assertIn("IN (%s)" % self.a1.pk, sql)
|
|
|
|
def test_error_messages(self):
|
|
# Programming errors are pointed out with nice error messages
|
|
with self.assertRaisesMessage(
|
|
FieldError,
|
|
"Cannot resolve keyword 'pub_date_year' into field. Choices are: "
|
|
"author, author_id, headline, id, pub_date, slug, tag",
|
|
):
|
|
Article.objects.filter(pub_date_year="2005").count()
|
|
|
|
def test_unsupported_lookups(self):
|
|
with self.assertRaisesMessage(
|
|
FieldError,
|
|
"Unsupported lookup 'starts' for CharField or join on the field "
|
|
"not permitted, perhaps you meant startswith or istartswith?",
|
|
):
|
|
Article.objects.filter(headline__starts="Article")
|
|
|
|
with self.assertRaisesMessage(
|
|
FieldError,
|
|
"Unsupported lookup 'is_null' for DateTimeField or join on the field "
|
|
"not permitted, perhaps you meant isnull?",
|
|
):
|
|
Article.objects.filter(pub_date__is_null=True)
|
|
|
|
with self.assertRaisesMessage(
|
|
FieldError,
|
|
"Unsupported lookup 'gobbledygook' for DateTimeField or join on the field "
|
|
"not permitted.",
|
|
):
|
|
Article.objects.filter(pub_date__gobbledygook="blahblah")
|
|
|
|
def test_relation_nested_lookup_error(self):
|
|
# An invalid nested lookup on a related field raises a useful error.
|
|
msg = "Related Field got invalid lookup: editor"
|
|
with self.assertRaisesMessage(FieldError, msg):
|
|
Article.objects.filter(author__editor__name="James")
|
|
msg = "Related Field got invalid lookup: foo"
|
|
with self.assertRaisesMessage(FieldError, msg):
|
|
Tag.objects.filter(articles__foo="bar")
|
|
|
|
def test_regex(self):
|
|
# Create some articles with a bit more interesting headlines for
|
|
# testing field lookups.
|
|
Article.objects.all().delete()
|
|
now = datetime.now()
|
|
Article.objects.bulk_create(
|
|
[
|
|
Article(pub_date=now, headline="f"),
|
|
Article(pub_date=now, headline="fo"),
|
|
Article(pub_date=now, headline="foo"),
|
|
Article(pub_date=now, headline="fooo"),
|
|
Article(pub_date=now, headline="hey-Foo"),
|
|
Article(pub_date=now, headline="bar"),
|
|
Article(pub_date=now, headline="AbBa"),
|
|
Article(pub_date=now, headline="baz"),
|
|
Article(pub_date=now, headline="baxZ"),
|
|
]
|
|
)
|
|
# zero-or-more
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__regex=r"fo*"),
|
|
Article.objects.filter(headline__in=["f", "fo", "foo", "fooo"]),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__iregex=r"fo*"),
|
|
Article.objects.filter(headline__in=["f", "fo", "foo", "fooo", "hey-Foo"]),
|
|
)
|
|
# one-or-more
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__regex=r"fo+"),
|
|
Article.objects.filter(headline__in=["fo", "foo", "fooo"]),
|
|
)
|
|
# wildcard
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__regex=r"fooo?"),
|
|
Article.objects.filter(headline__in=["foo", "fooo"]),
|
|
)
|
|
# leading anchor
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__regex=r"^b"),
|
|
Article.objects.filter(headline__in=["bar", "baxZ", "baz"]),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__iregex=r"^a"),
|
|
Article.objects.filter(headline="AbBa"),
|
|
)
|
|
# trailing anchor
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__regex=r"z$"),
|
|
Article.objects.filter(headline="baz"),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__iregex=r"z$"),
|
|
Article.objects.filter(headline__in=["baxZ", "baz"]),
|
|
)
|
|
# character sets
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__regex=r"ba[rz]"),
|
|
Article.objects.filter(headline__in=["bar", "baz"]),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__regex=r"ba.[RxZ]"),
|
|
Article.objects.filter(headline="baxZ"),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__iregex=r"ba[RxZ]"),
|
|
Article.objects.filter(headline__in=["bar", "baxZ", "baz"]),
|
|
)
|
|
|
|
# and more articles:
|
|
Article.objects.bulk_create(
|
|
[
|
|
Article(pub_date=now, headline="foobar"),
|
|
Article(pub_date=now, headline="foobaz"),
|
|
Article(pub_date=now, headline="ooF"),
|
|
Article(pub_date=now, headline="foobarbaz"),
|
|
Article(pub_date=now, headline="zoocarfaz"),
|
|
Article(pub_date=now, headline="barfoobaz"),
|
|
Article(pub_date=now, headline="bazbaRFOO"),
|
|
]
|
|
)
|
|
|
|
# alternation
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__regex=r"oo(f|b)"),
|
|
Article.objects.filter(
|
|
headline__in=[
|
|
"barfoobaz",
|
|
"foobar",
|
|
"foobarbaz",
|
|
"foobaz",
|
|
]
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__iregex=r"oo(f|b)"),
|
|
Article.objects.filter(
|
|
headline__in=[
|
|
"barfoobaz",
|
|
"foobar",
|
|
"foobarbaz",
|
|
"foobaz",
|
|
"ooF",
|
|
]
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__regex=r"^foo(f|b)"),
|
|
Article.objects.filter(headline__in=["foobar", "foobarbaz", "foobaz"]),
|
|
)
|
|
|
|
# greedy matching
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__regex=r"b.*az"),
|
|
Article.objects.filter(
|
|
headline__in=[
|
|
"barfoobaz",
|
|
"baz",
|
|
"bazbaRFOO",
|
|
"foobarbaz",
|
|
"foobaz",
|
|
]
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__iregex=r"b.*ar"),
|
|
Article.objects.filter(
|
|
headline__in=[
|
|
"bar",
|
|
"barfoobaz",
|
|
"bazbaRFOO",
|
|
"foobar",
|
|
"foobarbaz",
|
|
]
|
|
),
|
|
)
|
|
|
|
@skipUnlessDBFeature("supports_regex_backreferencing")
|
|
def test_regex_backreferencing(self):
|
|
# grouping and backreferences
|
|
now = datetime.now()
|
|
Article.objects.bulk_create(
|
|
[
|
|
Article(pub_date=now, headline="foobar"),
|
|
Article(pub_date=now, headline="foobaz"),
|
|
Article(pub_date=now, headline="ooF"),
|
|
Article(pub_date=now, headline="foobarbaz"),
|
|
Article(pub_date=now, headline="zoocarfaz"),
|
|
Article(pub_date=now, headline="barfoobaz"),
|
|
Article(pub_date=now, headline="bazbaRFOO"),
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(headline__regex=r"b(.).*b\1").values_list(
|
|
"headline", flat=True
|
|
),
|
|
["barfoobaz", "bazbaRFOO", "foobarbaz"],
|
|
)
|
|
|
|
def test_regex_null(self):
|
|
"""
|
|
A regex lookup does not fail on null/None values
|
|
"""
|
|
Season.objects.create(year=2012, gt=None)
|
|
self.assertQuerysetEqual(Season.objects.filter(gt__regex=r"^$"), [])
|
|
|
|
def test_regex_non_string(self):
|
|
"""
|
|
A regex lookup does not fail on non-string fields
|
|
"""
|
|
s = Season.objects.create(year=2013, gt=444)
|
|
self.assertQuerysetEqual(Season.objects.filter(gt__regex=r"^444$"), [s])
|
|
|
|
def test_regex_non_ascii(self):
|
|
"""
|
|
A regex lookup does not trip on non-ASCII characters.
|
|
"""
|
|
Player.objects.create(name="\u2660")
|
|
Player.objects.get(name__regex="\u2660")
|
|
|
|
def test_nonfield_lookups(self):
|
|
"""
|
|
A lookup query containing non-fields raises the proper exception.
|
|
"""
|
|
msg = (
|
|
"Unsupported lookup 'blahblah' for CharField or join on the field not "
|
|
"permitted."
|
|
)
|
|
with self.assertRaisesMessage(FieldError, msg):
|
|
Article.objects.filter(headline__blahblah=99)
|
|
with self.assertRaisesMessage(FieldError, msg):
|
|
Article.objects.filter(headline__blahblah__exact=99)
|
|
msg = (
|
|
"Cannot resolve keyword 'blahblah' into field. Choices are: "
|
|
"author, author_id, headline, id, pub_date, slug, tag"
|
|
)
|
|
with self.assertRaisesMessage(FieldError, msg):
|
|
Article.objects.filter(blahblah=99)
|
|
|
|
def test_lookup_collision(self):
|
|
"""
|
|
Genuine field names don't collide with built-in lookup types
|
|
('year', 'gt', 'range', 'in' etc.) (#11670).
|
|
"""
|
|
# 'gt' is used as a code number for the year, e.g. 111=>2009.
|
|
season_2009 = Season.objects.create(year=2009, gt=111)
|
|
season_2009.games.create(home="Houston Astros", away="St. Louis Cardinals")
|
|
season_2010 = Season.objects.create(year=2010, gt=222)
|
|
season_2010.games.create(home="Houston Astros", away="Chicago Cubs")
|
|
season_2010.games.create(home="Houston Astros", away="Milwaukee Brewers")
|
|
season_2010.games.create(home="Houston Astros", away="St. Louis Cardinals")
|
|
season_2011 = Season.objects.create(year=2011, gt=333)
|
|
season_2011.games.create(home="Houston Astros", away="St. Louis Cardinals")
|
|
season_2011.games.create(home="Houston Astros", away="Milwaukee Brewers")
|
|
hunter_pence = Player.objects.create(name="Hunter Pence")
|
|
hunter_pence.games.set(Game.objects.filter(season__year__in=[2009, 2010]))
|
|
pudge = Player.objects.create(name="Ivan Rodriquez")
|
|
pudge.games.set(Game.objects.filter(season__year=2009))
|
|
pedro_feliz = Player.objects.create(name="Pedro Feliz")
|
|
pedro_feliz.games.set(Game.objects.filter(season__year__in=[2011]))
|
|
johnson = Player.objects.create(name="Johnson")
|
|
johnson.games.set(Game.objects.filter(season__year__in=[2011]))
|
|
|
|
# Games in 2010
|
|
self.assertEqual(Game.objects.filter(season__year=2010).count(), 3)
|
|
self.assertEqual(Game.objects.filter(season__year__exact=2010).count(), 3)
|
|
self.assertEqual(Game.objects.filter(season__gt=222).count(), 3)
|
|
self.assertEqual(Game.objects.filter(season__gt__exact=222).count(), 3)
|
|
|
|
# Games in 2011
|
|
self.assertEqual(Game.objects.filter(season__year=2011).count(), 2)
|
|
self.assertEqual(Game.objects.filter(season__year__exact=2011).count(), 2)
|
|
self.assertEqual(Game.objects.filter(season__gt=333).count(), 2)
|
|
self.assertEqual(Game.objects.filter(season__gt__exact=333).count(), 2)
|
|
self.assertEqual(Game.objects.filter(season__year__gt=2010).count(), 2)
|
|
self.assertEqual(Game.objects.filter(season__gt__gt=222).count(), 2)
|
|
|
|
# Games played in 2010 and 2011
|
|
self.assertEqual(Game.objects.filter(season__year__in=[2010, 2011]).count(), 5)
|
|
self.assertEqual(Game.objects.filter(season__year__gt=2009).count(), 5)
|
|
self.assertEqual(Game.objects.filter(season__gt__in=[222, 333]).count(), 5)
|
|
self.assertEqual(Game.objects.filter(season__gt__gt=111).count(), 5)
|
|
|
|
# Players who played in 2009
|
|
self.assertEqual(
|
|
Player.objects.filter(games__season__year=2009).distinct().count(), 2
|
|
)
|
|
self.assertEqual(
|
|
Player.objects.filter(games__season__year__exact=2009).distinct().count(), 2
|
|
)
|
|
self.assertEqual(
|
|
Player.objects.filter(games__season__gt=111).distinct().count(), 2
|
|
)
|
|
self.assertEqual(
|
|
Player.objects.filter(games__season__gt__exact=111).distinct().count(), 2
|
|
)
|
|
|
|
# Players who played in 2010
|
|
self.assertEqual(
|
|
Player.objects.filter(games__season__year=2010).distinct().count(), 1
|
|
)
|
|
self.assertEqual(
|
|
Player.objects.filter(games__season__year__exact=2010).distinct().count(), 1
|
|
)
|
|
self.assertEqual(
|
|
Player.objects.filter(games__season__gt=222).distinct().count(), 1
|
|
)
|
|
self.assertEqual(
|
|
Player.objects.filter(games__season__gt__exact=222).distinct().count(), 1
|
|
)
|
|
|
|
# Players who played in 2011
|
|
self.assertEqual(
|
|
Player.objects.filter(games__season__year=2011).distinct().count(), 2
|
|
)
|
|
self.assertEqual(
|
|
Player.objects.filter(games__season__year__exact=2011).distinct().count(), 2
|
|
)
|
|
self.assertEqual(
|
|
Player.objects.filter(games__season__gt=333).distinct().count(), 2
|
|
)
|
|
self.assertEqual(
|
|
Player.objects.filter(games__season__year__gt=2010).distinct().count(), 2
|
|
)
|
|
self.assertEqual(
|
|
Player.objects.filter(games__season__gt__gt=222).distinct().count(), 2
|
|
)
|
|
|
|
def test_chain_date_time_lookups(self):
|
|
self.assertCountEqual(
|
|
Article.objects.filter(pub_date__month__gt=7),
|
|
[self.a5, self.a6],
|
|
)
|
|
self.assertCountEqual(
|
|
Article.objects.filter(pub_date__day__gte=27),
|
|
[self.a2, self.a3, self.a4, self.a7],
|
|
)
|
|
self.assertCountEqual(
|
|
Article.objects.filter(pub_date__hour__lt=8),
|
|
[self.a1, self.a2, self.a3, self.a4, self.a7],
|
|
)
|
|
self.assertCountEqual(
|
|
Article.objects.filter(pub_date__minute__lte=0),
|
|
[self.a1, self.a2, self.a3, self.a4, self.a5, self.a6, self.a7],
|
|
)
|
|
|
|
def test_exact_none_transform(self):
|
|
"""Transforms are used for __exact=None."""
|
|
Season.objects.create(year=1, nulled_text_field="not null")
|
|
self.assertFalse(Season.objects.filter(nulled_text_field__isnull=True))
|
|
self.assertTrue(Season.objects.filter(nulled_text_field__nulled__isnull=True))
|
|
self.assertTrue(Season.objects.filter(nulled_text_field__nulled__exact=None))
|
|
self.assertTrue(Season.objects.filter(nulled_text_field__nulled=None))
|
|
|
|
def test_exact_sliced_queryset_limit_one(self):
|
|
self.assertCountEqual(
|
|
Article.objects.filter(author=Author.objects.all()[:1]),
|
|
[self.a1, self.a2, self.a3, self.a4],
|
|
)
|
|
|
|
def test_exact_sliced_queryset_limit_one_offset(self):
|
|
self.assertCountEqual(
|
|
Article.objects.filter(author=Author.objects.all()[1:2]),
|
|
[self.a5, self.a6, self.a7],
|
|
)
|
|
|
|
def test_exact_sliced_queryset_not_limited_to_one(self):
|
|
msg = (
|
|
"The QuerySet value for an exact lookup must be limited to one "
|
|
"result using slicing."
|
|
)
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
list(Article.objects.filter(author=Author.objects.all()[:2]))
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
list(Article.objects.filter(author=Author.objects.all()[1:]))
|
|
|
|
@skipUnless(connection.vendor == "mysql", "MySQL-specific workaround.")
|
|
def test_exact_booleanfield(self):
|
|
# MySQL ignores indexes with boolean fields unless they're compared
|
|
# directly to a boolean value.
|
|
product = Product.objects.create(name="Paper", qty_target=5000)
|
|
Stock.objects.create(product=product, short=False, qty_available=5100)
|
|
stock_1 = Stock.objects.create(product=product, short=True, qty_available=180)
|
|
qs = Stock.objects.filter(short=True)
|
|
self.assertSequenceEqual(qs, [stock_1])
|
|
self.assertIn(
|
|
"%s = True" % connection.ops.quote_name("short"),
|
|
str(qs.query),
|
|
)
|
|
|
|
@skipUnless(connection.vendor == "mysql", "MySQL-specific workaround.")
|
|
def test_exact_booleanfield_annotation(self):
|
|
# MySQL ignores indexes with boolean fields unless they're compared
|
|
# directly to a boolean value.
|
|
qs = Author.objects.annotate(
|
|
case=Case(
|
|
When(alias="a1", then=True),
|
|
default=False,
|
|
output_field=BooleanField(),
|
|
)
|
|
).filter(case=True)
|
|
self.assertSequenceEqual(qs, [self.au1])
|
|
self.assertIn(" = True", str(qs.query))
|
|
|
|
qs = Author.objects.annotate(
|
|
wrapped=ExpressionWrapper(Q(alias="a1"), output_field=BooleanField()),
|
|
).filter(wrapped=True)
|
|
self.assertSequenceEqual(qs, [self.au1])
|
|
self.assertIn(" = True", str(qs.query))
|
|
# EXISTS(...) shouldn't be compared to a boolean value.
|
|
qs = Author.objects.annotate(
|
|
exists=Exists(Author.objects.filter(alias="a1", pk=OuterRef("pk"))),
|
|
).filter(exists=True)
|
|
self.assertSequenceEqual(qs, [self.au1])
|
|
self.assertNotIn(" = True", str(qs.query))
|
|
|
|
def test_custom_field_none_rhs(self):
|
|
"""
|
|
__exact=value is transformed to __isnull=True if Field.get_prep_value()
|
|
converts value to None.
|
|
"""
|
|
season = Season.objects.create(year=2012, nulled_text_field=None)
|
|
self.assertTrue(
|
|
Season.objects.filter(pk=season.pk, nulled_text_field__isnull=True)
|
|
)
|
|
self.assertTrue(Season.objects.filter(pk=season.pk, nulled_text_field=""))
|
|
|
|
def test_pattern_lookups_with_substr(self):
|
|
a = Author.objects.create(name="John Smith", alias="Johx")
|
|
b = Author.objects.create(name="Rhonda Simpson", alias="sonx")
|
|
tests = (
|
|
("startswith", [a]),
|
|
("istartswith", [a]),
|
|
("contains", [a, b]),
|
|
("icontains", [a, b]),
|
|
("endswith", [b]),
|
|
("iendswith", [b]),
|
|
)
|
|
for lookup, result in tests:
|
|
with self.subTest(lookup=lookup):
|
|
authors = Author.objects.filter(
|
|
**{"name__%s" % lookup: Substr("alias", 1, 3)}
|
|
)
|
|
self.assertCountEqual(authors, result)
|
|
|
|
def test_custom_lookup_none_rhs(self):
|
|
"""Lookup.can_use_none_as_rhs=True allows None as a lookup value."""
|
|
season = Season.objects.create(year=2012, nulled_text_field=None)
|
|
query = Season.objects.get_queryset().query
|
|
field = query.model._meta.get_field("nulled_text_field")
|
|
self.assertIsInstance(
|
|
query.build_lookup(["isnull_none_rhs"], field, None), IsNullWithNoneAsRHS
|
|
)
|
|
self.assertTrue(
|
|
Season.objects.filter(pk=season.pk, nulled_text_field__isnull_none_rhs=True)
|
|
)
|
|
|
|
def test_exact_exists(self):
|
|
qs = Article.objects.filter(pk=OuterRef("pk"))
|
|
seasons = Season.objects.annotate(pk_exists=Exists(qs),).filter(
|
|
pk_exists=Exists(qs),
|
|
)
|
|
self.assertCountEqual(seasons, Season.objects.all())
|
|
|
|
def test_nested_outerref_lhs(self):
|
|
tag = Tag.objects.create(name=self.au1.alias)
|
|
tag.articles.add(self.a1)
|
|
qs = Tag.objects.annotate(
|
|
has_author_alias_match=Exists(
|
|
Article.objects.annotate(
|
|
author_exists=Exists(
|
|
Author.objects.filter(alias=OuterRef(OuterRef("name")))
|
|
),
|
|
).filter(author_exists=True)
|
|
),
|
|
)
|
|
self.assertEqual(qs.get(has_author_alias_match=True), tag)
|
|
|
|
def test_exact_query_rhs_with_selected_columns(self):
|
|
newest_author = Author.objects.create(name="Author 2")
|
|
authors_max_ids = (
|
|
Author.objects.filter(
|
|
name="Author 2",
|
|
)
|
|
.values(
|
|
"name",
|
|
)
|
|
.annotate(
|
|
max_id=Max("id"),
|
|
)
|
|
.values("max_id")
|
|
)
|
|
authors = Author.objects.filter(id=authors_max_ids[:1])
|
|
self.assertEqual(authors.get(), newest_author)
|
|
|
|
def test_isnull_non_boolean_value(self):
|
|
msg = "The QuerySet value for an isnull lookup must be True or False."
|
|
tests = [
|
|
Author.objects.filter(alias__isnull=1),
|
|
Article.objects.filter(author__isnull=1),
|
|
Season.objects.filter(games__isnull=1),
|
|
Freebie.objects.filter(stock__isnull=1),
|
|
]
|
|
for qs in tests:
|
|
with self.subTest(qs=qs):
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
qs.exists()
|
|
|
|
def test_lookup_rhs(self):
|
|
product = Product.objects.create(name="GME", qty_target=5000)
|
|
stock_1 = Stock.objects.create(product=product, short=True, qty_available=180)
|
|
stock_2 = Stock.objects.create(product=product, short=False, qty_available=5100)
|
|
Stock.objects.create(product=product, short=False, qty_available=4000)
|
|
self.assertCountEqual(
|
|
Stock.objects.filter(short=Q(qty_available__lt=F("product__qty_target"))),
|
|
[stock_1, stock_2],
|
|
)
|
|
self.assertCountEqual(
|
|
Stock.objects.filter(
|
|
short=ExpressionWrapper(
|
|
Q(qty_available__lt=F("product__qty_target")),
|
|
output_field=BooleanField(),
|
|
)
|
|
),
|
|
[stock_1, stock_2],
|
|
)
|
|
|
|
|
|
class LookupQueryingTests(TestCase):
|
|
@classmethod
|
|
def setUpTestData(cls):
|
|
cls.s1 = Season.objects.create(year=1942, gt=1942)
|
|
cls.s2 = Season.objects.create(year=1842, gt=1942, nulled_text_field="text")
|
|
cls.s3 = Season.objects.create(year=2042, gt=1942)
|
|
|
|
def test_annotate(self):
|
|
qs = Season.objects.annotate(equal=Exact(F("year"), 1942))
|
|
self.assertCountEqual(
|
|
qs.values_list("year", "equal"),
|
|
((1942, True), (1842, False), (2042, False)),
|
|
)
|
|
|
|
def test_alias(self):
|
|
qs = Season.objects.alias(greater=GreaterThan(F("year"), 1910))
|
|
self.assertCountEqual(qs.filter(greater=True), [self.s1, self.s3])
|
|
|
|
def test_annotate_value_greater_than_value(self):
|
|
qs = Season.objects.annotate(greater=GreaterThan(Value(40), Value(30)))
|
|
self.assertCountEqual(
|
|
qs.values_list("year", "greater"),
|
|
((1942, True), (1842, True), (2042, True)),
|
|
)
|
|
|
|
def test_annotate_field_greater_than_field(self):
|
|
qs = Season.objects.annotate(greater=GreaterThan(F("year"), F("gt")))
|
|
self.assertCountEqual(
|
|
qs.values_list("year", "greater"),
|
|
((1942, False), (1842, False), (2042, True)),
|
|
)
|
|
|
|
def test_annotate_field_greater_than_value(self):
|
|
qs = Season.objects.annotate(greater=GreaterThan(F("year"), Value(1930)))
|
|
self.assertCountEqual(
|
|
qs.values_list("year", "greater"),
|
|
((1942, True), (1842, False), (2042, True)),
|
|
)
|
|
|
|
def test_annotate_field_greater_than_literal(self):
|
|
qs = Season.objects.annotate(greater=GreaterThan(F("year"), 1930))
|
|
self.assertCountEqual(
|
|
qs.values_list("year", "greater"),
|
|
((1942, True), (1842, False), (2042, True)),
|
|
)
|
|
|
|
def test_annotate_literal_greater_than_field(self):
|
|
qs = Season.objects.annotate(greater=GreaterThan(1930, F("year")))
|
|
self.assertCountEqual(
|
|
qs.values_list("year", "greater"),
|
|
((1942, False), (1842, True), (2042, False)),
|
|
)
|
|
|
|
def test_annotate_less_than_float(self):
|
|
qs = Season.objects.annotate(lesser=LessThan(F("year"), 1942.1))
|
|
self.assertCountEqual(
|
|
qs.values_list("year", "lesser"),
|
|
((1942, True), (1842, True), (2042, False)),
|
|
)
|
|
|
|
def test_annotate_greater_than_or_equal(self):
|
|
qs = Season.objects.annotate(greater=GreaterThanOrEqual(F("year"), 1942))
|
|
self.assertCountEqual(
|
|
qs.values_list("year", "greater"),
|
|
((1942, True), (1842, False), (2042, True)),
|
|
)
|
|
|
|
def test_annotate_greater_than_or_equal_float(self):
|
|
qs = Season.objects.annotate(greater=GreaterThanOrEqual(F("year"), 1942.1))
|
|
self.assertCountEqual(
|
|
qs.values_list("year", "greater"),
|
|
((1942, False), (1842, False), (2042, True)),
|
|
)
|
|
|
|
def test_combined_lookups(self):
|
|
expression = Exact(F("year"), 1942) | GreaterThan(F("year"), 1942)
|
|
qs = Season.objects.annotate(gte=expression)
|
|
self.assertCountEqual(
|
|
qs.values_list("year", "gte"),
|
|
((1942, True), (1842, False), (2042, True)),
|
|
)
|
|
|
|
def test_lookup_in_filter(self):
|
|
qs = Season.objects.filter(GreaterThan(F("year"), 1910))
|
|
self.assertCountEqual(qs, [self.s1, self.s3])
|
|
|
|
def test_isnull_lookup_in_filter(self):
|
|
self.assertSequenceEqual(
|
|
Season.objects.filter(IsNull(F("nulled_text_field"), False)),
|
|
[self.s2],
|
|
)
|
|
self.assertCountEqual(
|
|
Season.objects.filter(IsNull(F("nulled_text_field"), True)),
|
|
[self.s1, self.s3],
|
|
)
|
|
|
|
def test_filter_lookup_lhs(self):
|
|
qs = Season.objects.annotate(before_20=LessThan(F("year"), 2000)).filter(
|
|
before_20=LessThan(F("year"), 1900),
|
|
)
|
|
self.assertCountEqual(qs, [self.s2, self.s3])
|
|
|
|
def test_filter_wrapped_lookup_lhs(self):
|
|
qs = (
|
|
Season.objects.annotate(
|
|
before_20=ExpressionWrapper(
|
|
Q(year__lt=2000),
|
|
output_field=BooleanField(),
|
|
)
|
|
)
|
|
.filter(before_20=LessThan(F("year"), 1900))
|
|
.values_list("year", flat=True)
|
|
)
|
|
self.assertCountEqual(qs, [1842, 2042])
|
|
|
|
def test_filter_exists_lhs(self):
|
|
qs = Season.objects.annotate(
|
|
before_20=Exists(
|
|
Season.objects.filter(pk=OuterRef("pk"), year__lt=2000),
|
|
)
|
|
).filter(before_20=LessThan(F("year"), 1900))
|
|
self.assertCountEqual(qs, [self.s2, self.s3])
|
|
|
|
def test_filter_subquery_lhs(self):
|
|
qs = Season.objects.annotate(
|
|
before_20=Subquery(
|
|
Season.objects.filter(pk=OuterRef("pk")).values(
|
|
lesser=LessThan(F("year"), 2000),
|
|
),
|
|
)
|
|
).filter(before_20=LessThan(F("year"), 1900))
|
|
self.assertCountEqual(qs, [self.s2, self.s3])
|
|
|
|
def test_combined_lookups_in_filter(self):
|
|
expression = Exact(F("year"), 1942) | GreaterThan(F("year"), 1942)
|
|
qs = Season.objects.filter(expression)
|
|
self.assertCountEqual(qs, [self.s1, self.s3])
|
|
|
|
def test_combined_annotated_lookups_in_filter(self):
|
|
expression = Exact(F("year"), 1942) | GreaterThan(F("year"), 1942)
|
|
qs = Season.objects.annotate(gte=expression).filter(gte=True)
|
|
self.assertCountEqual(qs, [self.s1, self.s3])
|
|
|
|
def test_combined_annotated_lookups_in_filter_false(self):
|
|
expression = Exact(F("year"), 1942) | GreaterThan(F("year"), 1942)
|
|
qs = Season.objects.annotate(gte=expression).filter(gte=False)
|
|
self.assertSequenceEqual(qs, [self.s2])
|
|
|
|
def test_lookup_in_order_by(self):
|
|
qs = Season.objects.order_by(LessThan(F("year"), 1910), F("year"))
|
|
self.assertSequenceEqual(qs, [self.s1, self.s3, self.s2])
|
|
|
|
@skipUnlessDBFeature("supports_boolean_expr_in_select_clause")
|
|
def test_aggregate_combined_lookup(self):
|
|
expression = Cast(GreaterThan(F("year"), 1900), models.IntegerField())
|
|
qs = Season.objects.aggregate(modern=models.Sum(expression))
|
|
self.assertEqual(qs["modern"], 2)
|
|
|
|
def test_conditional_expression(self):
|
|
qs = Season.objects.annotate(
|
|
century=Case(
|
|
When(
|
|
GreaterThan(F("year"), 1900) & LessThanOrEqual(F("year"), 2000),
|
|
then=Value("20th"),
|
|
),
|
|
default=Value("other"),
|
|
)
|
|
).values("year", "century")
|
|
self.assertCountEqual(
|
|
qs,
|
|
[
|
|
{"year": 1942, "century": "20th"},
|
|
{"year": 1842, "century": "other"},
|
|
{"year": 2042, "century": "other"},
|
|
],
|
|
)
|