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
|
from __future__ import unicode_literals
import datetime
import pickle
import unittest
import warnings
from django.db import models
from django.test import TestCase
from django.utils import six
from django.utils.encoding import force_text
from django.utils.version import get_version
from .models import Container, Event, Group, Happening, M2MModel
class PickleabilityTestCase(TestCase):
def setUp(self):
Happening.objects.create() # make sure the defaults are working (#20158)
def assert_pickles(self, qs):
self.assertEqual(list(pickle.loads(pickle.dumps(qs))), list(qs))
def test_related_field(self):
g = Group.objects.create(name="Ponies Who Own Maybachs")
self.assert_pickles(Event.objects.filter(group=g.id))
def test_datetime_callable_default_all(self):
self.assert_pickles(Happening.objects.all())
def test_datetime_callable_default_filter(self):
self.assert_pickles(Happening.objects.filter(when=datetime.datetime.now()))
def test_string_as_default(self):
self.assert_pickles(Happening.objects.filter(name="test"))
def test_standalone_method_as_default(self):
self.assert_pickles(Happening.objects.filter(number1=1))
@unittest.skipIf(six.PY2, "Field doesn't exist on Python 2.")
def test_staticmethod_as_default(self):
self.assert_pickles(Happening.objects.filter(number2=1))
def test_filter_reverse_fk(self):
self.assert_pickles(Group.objects.filter(event=1))
def test_doesnotexist_exception(self):
# Ticket #17776
original = Event.DoesNotExist("Doesn't exist")
unpickled = pickle.loads(pickle.dumps(original))
# Exceptions are not equal to equivalent instances of themselves, so
# can't just use assertEqual(original, unpickled)
self.assertEqual(original.__class__, unpickled.__class__)
self.assertEqual(original.args, unpickled.args)
def test_manager_pickle(self):
pickle.loads(pickle.dumps(Happening.objects))
def test_model_pickle(self):
"""
Test that a model not defined on module level is pickleable.
"""
original = Container.SomeModel(pk=1)
dumped = pickle.dumps(original)
reloaded = pickle.loads(dumped)
self.assertEqual(original, reloaded)
# Also, deferred dynamic model works
Container.SomeModel.objects.create(somefield=1)
original = Container.SomeModel.objects.defer('somefield')[0]
dumped = pickle.dumps(original)
reloaded = pickle.loads(dumped)
self.assertEqual(original, reloaded)
self.assertEqual(original.somefield, reloaded.somefield)
def test_model_pickle_m2m(self):
"""
Test intentionally the automatically created through model.
"""
m1 = M2MModel.objects.create()
g1 = Group.objects.create(name='foof')
m1.groups.add(g1)
m2m_through = M2MModel._meta.get_field('groups').remote_field.through
original = m2m_through.objects.get()
dumped = pickle.dumps(original)
reloaded = pickle.loads(dumped)
self.assertEqual(original, reloaded)
def test_model_pickle_dynamic(self):
class Meta:
proxy = True
dynclass = type(str("DynamicEventSubclass"), (Event, ),
{'Meta': Meta, '__module__': Event.__module__})
original = dynclass(pk=1)
dumped = pickle.dumps(original)
reloaded = pickle.loads(dumped)
self.assertEqual(original, reloaded)
self.assertIs(reloaded.__class__, dynclass)
def test_specialized_queryset(self):
self.assert_pickles(Happening.objects.values('name'))
self.assert_pickles(Happening.objects.values('name').dates('when', 'year'))
# With related field (#14515)
self.assert_pickles(
Event.objects.select_related('group').order_by('title').values_list('title', 'group__name')
)
def test_pickle_prefetch_related_idempotence(self):
g = Group.objects.create(name='foo')
groups = Group.objects.prefetch_related('event_set')
# First pickling
groups = pickle.loads(pickle.dumps(groups))
self.assertQuerysetEqual(groups, [g], lambda x: x)
# Second pickling
groups = pickle.loads(pickle.dumps(groups))
self.assertQuerysetEqual(groups, [g], lambda x: x)
def test_pickle_prefetch_related_with_m2m_and_objects_deletion(self):
"""
#24831 -- Cached properties on ManyToOneRel created in QuerySet.delete()
caused subsequent QuerySet pickling to fail.
"""
g = Group.objects.create(name='foo')
m2m = M2MModel.objects.create()
m2m.groups.add(g)
Group.objects.all().delete()
m2ms = M2MModel.objects.prefetch_related('groups')
m2ms = pickle.loads(pickle.dumps(m2ms))
self.assertQuerysetEqual(m2ms, [m2m], lambda x: x)
def test_annotation_with_callable_default(self):
# Happening.when has a callable default of datetime.datetime.now.
qs = Happening.objects.annotate(latest_time=models.Max('when'))
self.assert_pickles(qs)
def test_missing_django_version_unpickling(self):
"""
#21430 -- Verifies a warning is raised for querysets that are
unpickled without a Django version
"""
qs = Group.missing_django_version_objects.all()
with warnings.catch_warnings(record=True) as recorded:
pickle.loads(pickle.dumps(qs))
msg = force_text(recorded.pop().message)
self.assertEqual(msg,
"Pickled queryset instance's Django version is not specified.")
def test_unsupported_unpickle(self):
"""
#21430 -- Verifies a warning is raised for querysets that are
unpickled with a different Django version than the current
"""
qs = Group.previous_django_version_objects.all()
with warnings.catch_warnings(record=True) as recorded:
pickle.loads(pickle.dumps(qs))
msg = force_text(recorded.pop().message)
self.assertEqual(
msg,
"Pickled queryset instance's Django version 1.0 does not "
"match the current version %s." % get_version()
)
|