diff --git a/django/contrib/contenttypes/management.py b/django/contrib/contenttypes/management.py
index 85f76bac77..8329ab65d9 100644
--- a/django/contrib/contenttypes/management.py
+++ b/django/contrib/contenttypes/management.py
@@ -5,6 +5,7 @@ from django.utils.encoding import smart_text
from django.utils import six
from django.utils.six.moves import input
+
def update_contenttypes(app, created_models, verbosity=2, db=DEFAULT_DB_ALIAS, **kwargs):
"""
Creates content types for models in the given app, removing any model
@@ -77,6 +78,7 @@ If you're unsure, answer 'no'.
if verbosity >= 2:
print("Stale content types remain.")
+
def update_all_contenttypes(verbosity=2, **kwargs):
for app in get_apps():
update_contenttypes(app, None, verbosity, **kwargs)
diff --git a/django/core/management/validation.py b/django/core/management/validation.py
index 32e7181dab..af15752f0f 100644
--- a/django/core/management/validation.py
+++ b/django/core/management/validation.py
@@ -35,7 +35,10 @@ def get_validation_errors(outfile, app=None):
for (app_name, error) in get_app_errors().items():
e.add(app_name, error)
- for cls in models.get_models(app):
+ inc = set(models.get_models(app, include_swapped=True))
+ no_inc = set(models.get_models(app))
+
+ for cls in models.get_models(app, include_swapped=True):
opts = cls._meta
# Check swappable attribute.
@@ -138,16 +141,17 @@ def get_validation_errors(outfile, app=None):
# fields, m2m fields, m2m related objects or related objects
if f.rel:
if f.rel.to not in models.get_models():
- e.add(opts, "'%s' has a relation with model %s, which has either not been installed or is abstract." % (f.name, f.rel.to))
+ # If the related model is swapped, provide a hint;
+ # otherwise, the model just hasn't been installed.
+ if not isinstance(f.rel.to, six.string_types) and f.rel.to._meta.swapped:
+ e.add(opts, "'%s' defines a relation with the model '%s.%s', which has been swapped out. Update the relation to point at settings.%s." % (f.name, f.rel.to._meta.app_label, f.rel.to._meta.object_name, f.rel.to._meta.swappable))
+ else:
+ e.add(opts, "'%s' has a relation with model %s, which has either not been installed or is abstract." % (f.name, f.rel.to))
# it is a string and we could not find the model it refers to
# so skip the next section
if isinstance(f.rel.to, six.string_types):
continue
- # Make sure the model we're related hasn't been swapped out
- if f.rel.to._meta.swapped:
- e.add(opts, "'%s' defines a relation with the model '%s.%s', which has been swapped out. Update the relation to point at settings.%s." % (f.name, f.rel.to._meta.app_label, f.rel.to._meta.object_name, f.rel.to._meta.swappable))
-
# Make sure the related field specified by a ForeignKey is unique
if not f.rel.to._meta.get_field(f.rel.field_name).unique:
e.add(opts, "Field '%s' under model '%s' must have a unique=True constraint." % (f.rel.field_name, f.rel.to.__name__))
@@ -184,16 +188,18 @@ def get_validation_errors(outfile, app=None):
# existing fields, m2m fields, m2m related objects or related
# objects
if f.rel.to not in models.get_models():
- e.add(opts, "'%s' has an m2m relation with model %s, which has either not been installed or is abstract." % (f.name, f.rel.to))
+ # If the related model is swapped, provide a hint;
+ # otherwise, the model just hasn't been installed.
+ if not isinstance(f.rel.to, six.string_types) and f.rel.to._meta.swapped:
+ e.add(opts, "'%s' defines a relation with the model '%s.%s', which has been swapped out. Update the relation to point at settings.%s." % (f.name, f.rel.to._meta.app_label, f.rel.to._meta.object_name, f.rel.to._meta.swappable))
+ else:
+ e.add(opts, "'%s' has an m2m relation with model %s, which has either not been installed or is abstract." % (f.name, f.rel.to))
+
# it is a string and we could not find the model it refers to
# so skip the next section
if isinstance(f.rel.to, six.string_types):
continue
- # Make sure the model we're related hasn't been swapped out
- if f.rel.to._meta.swapped:
- e.add(opts, "'%s' defines a relation with the model '%s.%s', which has been swapped out. Update the relation to point at settings.%s." % (f.name, f.rel.to._meta.app_label, f.rel.to._meta.object_name, f.rel.to._meta.swappable))
-
# Check that the field is not set to unique. ManyToManyFields do not support unique.
if f.unique:
e.add(opts, "ManyToManyFields cannot be unique. Remove the unique argument on '%s'." % f.name)
diff --git a/django/db/models/loading.py b/django/db/models/loading.py
index 8a0e796f4b..a0510acc6d 100644
--- a/django/db/models/loading.py
+++ b/django/db/models/loading.py
@@ -24,24 +24,24 @@ class AppCache(object):
# http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66531.
__shared_state = dict(
# Keys of app_store are the model modules for each application.
- app_store = SortedDict(),
+ app_store=SortedDict(),
# Mapping of installed app_labels to model modules for that app.
- app_labels = {},
+ app_labels={},
# Mapping of app_labels to a dictionary of model names to model code.
# May contain apps that are not installed.
- app_models = SortedDict(),
+ app_models=SortedDict(),
# Mapping of app_labels to errors raised when trying to import the app.
- app_errors = {},
+ app_errors={},
# -- Everything below here is only used when populating the cache --
- loaded = False,
- handled = {},
- postponed = [],
- nesting_level = 0,
- _get_models_cache = {},
+ loaded=False,
+ handled={},
+ postponed=[],
+ nesting_level=0,
+ _get_models_cache={},
)
def __init__(self):
@@ -167,7 +167,7 @@ class AppCache(object):
def get_models(self, app_mod=None,
include_auto_created=False, include_deferred=False,
- only_installed=True):
+ only_installed=True, include_swapped=False):
"""
Given a module containing models, returns a list of the models.
Otherwise returns a list of all installed models.
@@ -179,8 +179,16 @@ class AppCache(object):
By default, models created to satisfy deferred attribute
queries are *not* included in the list of models. However, if
you specify include_deferred, they will be.
+
+ By default, models that aren't part of installed apps will *not*
+ be included in the list of models. However, if you specify
+ only_installed=False, they will be.
+
+ By default, models that have been swapped out will *not* be
+ included in the list of models. However, if you specify
+ include_swapped, they will be.
"""
- cache_key = (app_mod, include_auto_created, include_deferred, only_installed)
+ cache_key = (app_mod, include_auto_created, include_deferred, only_installed, include_swapped)
try:
return self._get_models_cache[cache_key]
except KeyError:
@@ -203,7 +211,8 @@ class AppCache(object):
model_list.extend(
model for model in app.values()
if ((not model._deferred or include_deferred) and
- (not model._meta.auto_created or include_auto_created))
+ (not model._meta.auto_created or include_auto_created) and
+ (not model._meta.swapped or include_swapped))
)
self._get_models_cache[cache_key] = model_list
return model_list
diff --git a/tests/regressiontests/swappable_models/__init__.py b/tests/regressiontests/swappable_models/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/tests/regressiontests/swappable_models/models.py b/tests/regressiontests/swappable_models/models.py
new file mode 100644
index 0000000000..92692d4396
--- /dev/null
+++ b/tests/regressiontests/swappable_models/models.py
@@ -0,0 +1,15 @@
+from django.db import models
+
+
+class Article(models.Model):
+ title = models.CharField(max_length=100)
+ publication_date = models.DateField()
+
+ class Meta:
+ swappable = 'TEST_ARTICLE_MODEL'
+
+
+class AlternateArticle(models.Model):
+ title = models.CharField(max_length=100)
+ publication_date = models.DateField()
+ byline = models.CharField(max_length=100)
diff --git a/tests/regressiontests/swappable_models/tests.py b/tests/regressiontests/swappable_models/tests.py
new file mode 100644
index 0000000000..d9a01f9e26
--- /dev/null
+++ b/tests/regressiontests/swappable_models/tests.py
@@ -0,0 +1,46 @@
+from __future__ import absolute_import, unicode_literals
+
+from django.utils.six import StringIO
+
+from django.contrib.auth.models import Permission
+from django.contrib.contenttypes.models import ContentType
+from django.core import management
+from django.db.models.loading import cache
+from django.test import TestCase
+from django.test.utils import override_settings
+
+
+class SwappableModelTests(TestCase):
+ def setUp(self):
+ # This test modifies the installed apps, so we need to make sure
+ # we're not dealing with a cached app list.
+ cache._get_models_cache.clear()
+
+ def tearDown(self):
+ # By fiddling with swappable models, we alter the installed models
+ # cache, so flush it to make sure there are no side effects.
+ cache._get_models_cache.clear()
+
+ @override_settings(TEST_ARTICLE_MODEL='swappable_models.AlternateArticle')
+ def test_generated_data(self):
+ "Permissions and content types are not created for a swapped model"
+
+ # Delete all permissions and content_types
+ Permission.objects.all().delete()
+ ContentType.objects.all().delete()
+
+ # Re-run syncdb. This will re-build the permissions and content types.
+ new_io = StringIO()
+ management.call_command('syncdb', load_initial_data=False, interactive=False, stdout=new_io)
+
+ # Check that content types and permissions exist for the swapped model,
+ # but not for the swappable model.
+ apps_models = [(p.content_type.app_label, p.content_type.model)
+ for p in Permission.objects.all()]
+ self.assertIn(('swappable_models', 'alternatearticle'), apps_models)
+ self.assertNotIn(('swappable_models', 'article'), apps_models)
+
+ apps_models = [(ct.app_label, ct.model)
+ for ct in ContentType.objects.all()]
+ self.assertIn(('swappable_models', 'alternatearticle'), apps_models)
+ self.assertNotIn(('swappable_models', 'article'), apps_models)