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django/tests/or_lookups/tests.py at main · django/django · GitHub

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from datetime import datetime

from operator import attrgetter

from django.db.models import Q

from django.test import TestCase

from .models import Article

class OrLookupsTests(TestCase):

@classmethod

def setUpTestData(cls):

cls.a1 = Article.objects.create(

headline="Hello", pub_date=datetime(2005, 11, 27)

).pk

cls.a2 = Article.objects.create(

headline="Goodbye", pub_date=datetime(2005, 11, 28)

).pk

cls.a3 = Article.objects.create(

headline="Hello and goodbye", pub_date=datetime(2005, 11, 29)

).pk

def test_filter_or(self):

self.assertQuerySetEqual(

(

Article.objects.filter(headline__startswith="Hello")

| Article.objects.filter(headline__startswith="Goodbye")

["Hello", "Goodbye", "Hello and goodbye"],

attrgetter("headline"),

)

self.assertQuerySetEqual(

Article.objects.filter(headline__contains="Hello")

| Article.objects.filter(headline__contains="bye"),

["Hello", "Goodbye", "Hello and goodbye"],

attrgetter("headline"),

)

self.assertQuerySetEqual(

Article.objects.filter(headline__iexact="Hello")

| Article.objects.filter(headline__contains="ood"),

["Hello", "Goodbye", "Hello and goodbye"],

attrgetter("headline"),

)

self.assertQuerySetEqual(

Article.objects.filter(

Q(headline__startswith="Hello") | Q(headline__startswith="Goodbye")

["Hello", "Goodbye", "Hello and goodbye"],

attrgetter("headline"),

)

def test_stages(self):

# You can shorten this syntax with code like the following, which is

# especially useful if building the query in stages:

articles = Article.objects.all()

self.assertQuerySetEqual(

articles.filter(headline__startswith="Hello")

& articles.filter(headline__startswith="Goodbye"),

[],

)

self.assertQuerySetEqual(

articles.filter(headline__startswith="Hello")

& articles.filter(headline__contains="bye"),

["Hello and goodbye"],

attrgetter("headline"),

)

def test_pk_q(self):

self.assertQuerySetEqual(

Article.objects.filter(Q(pk=self.a1) | Q(pk=self.a2)),

["Hello", "Goodbye"],

attrgetter("headline"),

)

self.assertQuerySetEqual(

Article.objects.filter(Q(pk=self.a1) | Q(pk=self.a2) | Q(pk=self.a3)),

["Hello", "Goodbye", "Hello and goodbye"],

attrgetter("headline"),

)

def test_pk_in(self):

self.assertQuerySetEqual(

Article.objects.filter(pk__in=[self.a1, self.a2, self.a3]),

["Hello", "Goodbye", "Hello and goodbye"],

attrgetter("headline"),

)

self.assertQuerySetEqual(

Article.objects.filter(pk__in=(self.a1, self.a2, self.a3)),

["Hello", "Goodbye", "Hello and goodbye"],

attrgetter("headline"),

)

self.assertQuerySetEqual(

Article.objects.filter(pk__in=[self.a1, self.a2, self.a3, 40000]),

["Hello", "Goodbye", "Hello and goodbye"],

attrgetter("headline"),

)

def test_q_repr(self):

or_expr = Q(baz=Article(headline="Foö"))

self.assertEqual(repr(or_expr), "<Q: (AND: ('baz', <Article: Foö>))>")

negated_or = ~Q(baz=Article(headline="Foö"))

self.assertEqual(repr(negated_or), "<Q: (NOT (AND: ('baz', <Article: Foö>)))>")

def test_q_negated(self):

# Q objects can be negated

self.assertQuerySetEqual(

Article.objects.filter(Q(pk=self.a1) | ~Q(pk=self.a2)),

["Hello", "Hello and goodbye"],

attrgetter("headline"),

)

self.assertQuerySetEqual(

Article.objects.filter(~Q(pk=self.a1) & ~Q(pk=self.a2)),

["Hello and goodbye"],

attrgetter("headline"),

)

# This allows for more complex queries than filter() and exclude()

# alone would allow

self.assertQuerySetEqual(

Article.objects.filter(Q(pk=self.a1) & (~Q(pk=self.a2) | Q(pk=self.a3))),

["Hello"],

attrgetter("headline"),

)

def test_complex_filter(self):

# The 'complex_filter' method supports framework features such as

# 'limit_choices_to' which normally take a single dictionary of lookup

# arguments but need to support arbitrary queries via Q objects too.

self.assertQuerySetEqual(

Article.objects.complex_filter({"pk": self.a1}),

["Hello"],

attrgetter("headline"),

)

self.assertQuerySetEqual(

Article.objects.complex_filter(Q(pk=self.a1) | Q(pk=self.a2)),

["Hello", "Goodbye"],

attrgetter("headline"),

)

def test_empty_in(self):

# Passing "in" an empty list returns no results …

self.assertQuerySetEqual(Article.objects.filter(pk__in=[]), [])

# … but can return results if we OR it with another query.

self.assertQuerySetEqual(

Article.objects.filter(Q(pk__in=[]) | Q(headline__icontains="goodbye")),

["Goodbye", "Hello and goodbye"],

attrgetter("headline"),

)

def test_q_and(self):

# Q arg objects are ANDed

self.assertQuerySetEqual(

Article.objects.filter(

Q(headline__startswith="Hello"), Q(headline__contains="bye")

["Hello and goodbye"],

attrgetter("headline"),

)

# Q arg AND order is irrelevant

self.assertQuerySetEqual(

Article.objects.filter(

Q(headline__contains="bye"), headline__startswith="Hello"

["Hello and goodbye"],

attrgetter("headline"),

)

self.assertQuerySetEqual(

Article.objects.filter(

Q(headline__startswith="Hello") & Q(headline__startswith="Goodbye")

[],

)

def test_q_exclude(self):

self.assertQuerySetEqual(

Article.objects.exclude(Q(headline__startswith="Hello")),

["Goodbye"],

attrgetter("headline"),

)

def test_other_arg_queries(self):

# Try some arg queries with operations other than filter.

self.assertEqual(

Article.objects.get(

Q(headline__startswith="Hello"), Q(headline__contains="bye")

).headline,

"Hello and goodbye",

)

self.assertEqual(

Article.objects.filter(

Q(headline__startswith="Hello") | Q(headline__contains="bye")

).count(),

)

self.assertSequenceEqual(

Article.objects.filter(

Q(headline__startswith="Hello"), Q(headline__contains="bye")

).values(),

[

{

"headline": "Hello and goodbye",

"id": self.a3,

"pub_date": datetime(2005, 11, 29),

)

self.assertEqual(

Article.objects.filter(Q(headline__startswith="Hello")).in_bulk(

[self.a1, self.a2]

{self.a1: Article.objects.get(pk=self.a1)},

)

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