1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
from __future__ import unicode_literals
from django.test import TestCase
from django.utils import six
from .models import Person, Book, Car, PersonManager, PublishedBookManager
class CustomManagerTests(TestCase):
def setUp(self):
self.b1 = Book.published_objects.create(
title="How to program", author="Rodney Dangerfield", is_published=True)
self.b2 = Book.published_objects.create(
title="How to be smart", author="Albert Einstein", is_published=False)
self.p1 = Person.objects.create(first_name="Bugs", last_name="Bunny", fun=True)
self.p2 = Person.objects.create(first_name="Droopy", last_name="Dog", fun=False)
def test_manager(self):
# Test a custom `Manager` method.
self.assertQuerysetEqual(
Person.objects.get_fun_people(), [
"Bugs Bunny"
],
six.text_type
)
# Test that the methods of a custom `QuerySet` are properly
# copied onto the default `Manager`.
for manager in ['custom_queryset_default_manager',
'custom_queryset_custom_manager']:
manager = getattr(Person, manager)
# Copy public methods.
manager.public_method()
# Don't copy private methods.
with self.assertRaises(AttributeError):
manager._private_method()
# Copy methods with `manager=True` even if they are private.
manager._optin_private_method()
# Don't copy methods with `manager=False` even if they are public.
with self.assertRaises(AttributeError):
manager.optout_public_method()
# Test that the overridden method is called.
queryset = manager.filter()
self.assertQuerysetEqual(queryset, ["Bugs Bunny"], six.text_type)
self.assertEqual(queryset._filter_CustomQuerySet, True)
# Test that specialized querysets inherit from our custom queryset.
queryset = manager.values_list('first_name', flat=True).filter()
self.assertEqual(list(queryset), [six.text_type("Bugs")])
self.assertEqual(queryset._filter_CustomQuerySet, True)
# Test that the custom manager `__init__()` argument has been set.
self.assertEqual(Person.custom_queryset_custom_manager.init_arg, 'hello')
# Test that the custom manager method is only available on the manager.
Person.custom_queryset_custom_manager.manager_only()
with self.assertRaises(AttributeError):
Person.custom_queryset_custom_manager.all().manager_only()
# Test that the queryset method doesn't override the custom manager method.
queryset = Person.custom_queryset_custom_manager.filter()
self.assertQuerysetEqual(queryset, ["Bugs Bunny"], six.text_type)
self.assertEqual(queryset._filter_CustomManager, True)
# The RelatedManager used on the 'books' descriptor extends the default
# manager
self.assertIsInstance(self.p2.books, PublishedBookManager)
# The default manager, "objects", doesn't exist, because a custom one
# was provided.
self.assertRaises(AttributeError, lambda: Book.objects)
# The RelatedManager used on the 'authors' descriptor extends the
# default manager
self.assertIsInstance(self.b2.authors, PersonManager)
self.assertQuerysetEqual(
Book.published_objects.all(), [
"How to program",
],
lambda b: b.title
)
Car.cars.create(name="Corvette", mileage=21, top_speed=180)
Car.cars.create(name="Neon", mileage=31, top_speed=100)
self.assertQuerysetEqual(
Car.cars.order_by("name"), [
"Corvette",
"Neon",
],
lambda c: c.name
)
self.assertQuerysetEqual(
Car.fast_cars.all(), [
"Corvette",
],
lambda c: c.name
)
# Each model class gets a "_default_manager" attribute, which is a
# reference to the first manager defined in the class. In this case,
# it's "cars".
self.assertQuerysetEqual(
Car._default_manager.order_by("name"), [
"Corvette",
"Neon",
],
lambda c: c.name
)
def test_related_manager_fk(self):
self.p1.favorite_book = self.b1
self.p1.save()
self.p2.favorite_book = self.b1
self.p2.save()
self.assertQuerysetEqual(
self.b1.favorite_books.order_by('first_name').all(), [
"Bugs",
"Droopy",
],
lambda c: c.first_name
)
self.assertQuerysetEqual(
self.b1.favorite_books(manager='boring_people').all(), [
"Droopy",
],
lambda c: c.first_name
)
self.assertQuerysetEqual(
self.b1.favorite_books(manager='fun_people').all(), [
"Bugs",
],
lambda c: c.first_name
)
def test_related_manager_gfk(self):
self.p1.favorite_thing = self.b1
self.p1.save()
self.p2.favorite_thing = self.b1
self.p2.save()
self.assertQuerysetEqual(
self.b1.favorite_things.order_by('first_name').all(), [
"Bugs",
"Droopy",
],
lambda c: c.first_name
)
self.assertQuerysetEqual(
self.b1.favorite_things(manager='boring_people').all(), [
"Droopy",
],
lambda c: c.first_name
)
self.assertQuerysetEqual(
self.b1.favorite_things(manager='fun_people').all(), [
"Bugs",
],
lambda c: c.first_name
)
def test_related_manager_m2m(self):
self.b1.authors.add(self.p1)
self.b1.authors.add(self.p2)
self.assertQuerysetEqual(
self.b1.authors.order_by('first_name').all(), [
"Bugs",
"Droopy",
],
lambda c: c.first_name
)
self.assertQuerysetEqual(
self.b1.authors(manager='boring_people').all(), [
"Droopy",
],
lambda c: c.first_name
)
self.assertQuerysetEqual(
self.b1.authors(manager='fun_people').all(), [
"Bugs",
],
lambda c: c.first_name
)
|
