Refs #24919 -- Made test models serializable for migrations.

tests/admin_views/models.py

@@ -422,10 +422,12 @@ class Category(models.Model):
         return '%s:o%s' % (self.id, self.order)
 
 
+def link_posted_default():
+    return datetime.date.today() - datetime.timedelta(days=7)
+
+
 class Link(models.Model):
-    posted = models.DateField(
-        default=lambda: datetime.date.today() - datetime.timedelta(days=7)
-    )
+    posted = models.DateField(default=link_posted_default)
     url = models.URLField()
     post = models.ForeignKey("Post")
 

tests/delete/models.py

@@ -12,7 +12,8 @@ class R(models.Model):
         return "%s" % self.pk
 
 
-get_default_r = lambda: R.objects.get_or_create(is_default=True)[0]
+def get_default_r():
+    return R.objects.get_or_create(is_default=True)[0]
 
 
 class S(models.Model):

tests/field_subclassing/fields.py

@@ -5,6 +5,7 @@ import warnings
 
 from django.db import models
 from django.utils import six
+from django.utils.deconstruct import deconstructible
 from django.utils.deprecation import RemovedInDjango110Warning
 from django.utils.encoding import force_text, python_2_unicode_compatible
 
@@ -16,6 +17,7 @@ warnings.filterwarnings(
 )
 
 
+@deconstructible
 @python_2_unicode_compatible
 class Small(object):
     """

tests/forms_tests/models.py

@@ -10,7 +10,10 @@ from django.db import models
 from django.utils.encoding import python_2_unicode_compatible
 
 callable_default_counter = itertools.count()
-callable_default = lambda: next(callable_default_counter)
+
+
+def callable_default():
+    return next(callable_default_counter)
 
 
 temp_storage = FileSystemStorage(location=tempfile.mkdtemp())
@@ -68,25 +71,62 @@ class ChoiceOptionModel(models.Model):
         return 'ChoiceOption %d' % self.pk
 
 
+def choice_default():
+    return ChoiceOptionModel.objects.get_or_create(name='default')[0]
+
+
+def choice_default_list():
+    return [choice_default()]
+
+
+def int_default():
+    return 1
+
+
+def int_list_default():
+    return [1]
+
+
 class ChoiceFieldModel(models.Model):
     """Model with ForeignKey to another model, for testing ModelForm
     generation with ModelChoiceField."""
-    choice = models.ForeignKey(ChoiceOptionModel, blank=False,
-                               default=lambda: ChoiceOptionModel.objects.get(name='default'))
-    choice_int = models.ForeignKey(ChoiceOptionModel, blank=False, related_name='choice_int',
-                                   default=lambda: 1)
-
-    multi_choice = models.ManyToManyField(ChoiceOptionModel, blank=False, related_name='multi_choice',
-                                          default=lambda: ChoiceOptionModel.objects.filter(name='default'))
-    multi_choice_int = models.ManyToManyField(ChoiceOptionModel, blank=False, related_name='multi_choice_int',
-                                              default=lambda: [1])
+    choice = models.ForeignKey(
+        ChoiceOptionModel,
+        blank=False,
+        default=choice_default,
+    )
+    choice_int = models.ForeignKey(
+        ChoiceOptionModel,
+        blank=False,
+        related_name='choice_int',
+        default=int_default,
+    )
+    multi_choice = models.ManyToManyField(
+        ChoiceOptionModel,
+        blank=False,
+        related_name='multi_choice',
+        default=choice_default_list,
+    )
+    multi_choice_int = models.ManyToManyField(
+        ChoiceOptionModel,
+        blank=False,
+        related_name='multi_choice_int',
+        default=int_list_default,
+    )
 
 
 class OptionalMultiChoiceModel(models.Model):
-    multi_choice = models.ManyToManyField(ChoiceOptionModel, blank=False, related_name='not_relevant',
-                                          default=lambda: ChoiceOptionModel.objects.filter(name='default'))
-    multi_choice_optional = models.ManyToManyField(ChoiceOptionModel, blank=True,
-                                                   related_name='not_relevant2')
+    multi_choice = models.ManyToManyField(
+        ChoiceOptionModel,
+        blank=False,
+        related_name='not_relevant',
+        default=choice_default,
+    )
+    multi_choice_optional = models.ManyToManyField(
+        ChoiceOptionModel,
+        blank=True,
+        related_name='not_relevant2',
+    )
 
 
 class FileModel(models.Model):

tests/queryset_pickle/models.py

@@ -1,6 +1,7 @@
 import datetime
 
 from django.db import DJANGO_VERSION_PICKLE_KEY, models
+from django.utils import six
 from django.utils.translation import ugettext_lazy as _
 
 
@@ -13,15 +14,6 @@ class Numbers(object):
     def get_static_number():
         return 2
 
-    @classmethod
-    def get_class_number(cls):
-        return 3
-
-    def get_member_number(self):
-        return 4
-
-nn = Numbers()
-
 
 class PreviousDjangoVersionQuerySet(models.QuerySet):
     def __getstate__(self):
@@ -51,11 +43,11 @@ class Event(models.Model):
 
 class Happening(models.Model):
     when = models.DateTimeField(blank=True, default=datetime.datetime.now)
-    name = models.CharField(blank=True, max_length=100, default=lambda: "test")
+    name = models.CharField(blank=True, max_length=100, default="test")
     number1 = models.IntegerField(blank=True, default=standalone_number)
+    if six.PY3:
+        # default serializable on Python 3 only
         number2 = models.IntegerField(blank=True, default=Numbers.get_static_number)
-    number3 = models.IntegerField(blank=True, default=Numbers.get_class_number)
-    number4 = models.IntegerField(blank=True, default=nn.get_member_number)
 
 
 class Container(object):

tests/queryset_pickle/tests.py

@@ -2,9 +2,11 @@ from __future__ import unicode_literals
 
 import datetime
 import pickle
+import unittest
 import warnings
 
 from django.test import TestCase
+from django.utils import six
 from django.utils.encoding import force_text
 from django.utils.version import get_version
 
@@ -28,21 +30,16 @@ class PickleabilityTestCase(TestCase):
     def test_datetime_callable_default_filter(self):
         self.assert_pickles(Happening.objects.filter(when=datetime.datetime.now()))
 
-    def test_lambda_as_default(self):
+    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_classmethod_as_default(self):
-        self.assert_pickles(Happening.objects.filter(number3=1))
-
-    def test_membermethod_as_default(self):
-        self.assert_pickles(Happening.objects.filter(number4=1))
-
     def test_filter_reverse_fk(self):
         self.assert_pickles(Group.objects.filter(event=1))