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[1.7.x] Fixed #22331 -- Made MigrationAutodetector ignore unmanaged models. 

This commit reverts 69d4b1c and tackle the issue from a different angle.
Models remain present in the project state, but are now ignored by the
autodetector.

Backport of 42336c84a0 from master
This commit is contained in:
Loic Bistuer 2014-03-26 02:32:24 +08:00 committed by Tim Graham
parent 1cb6729f58
commit 39fc8d4b8e
2 changed files with 38 additions and 10 deletions
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21
django/db/migrations/autodetector.py
View File

@ -51,16 +51,17 @@ class MigrationAutodetector(object):
new_apps = self.to_state.render()
# Prepare lists of old/new model keys that we care about
# (i.e. ignoring proxy ones)
old_model_keys = [
(al, mn)
for al, mn in self.from_state.models.keys()
if not old_apps.get_model(al, mn)._meta.proxy
]
new_model_keys = [
(al, mn)
for al, mn in self.to_state.models.keys()
if not new_apps.get_model(al, mn)._meta.proxy
]
old_model_keys = []
for al, mn in self.from_state.models.keys():
model = old_apps.get_model(al, mn)
if not model._meta.proxy and model._meta.managed:
old_model_keys.append((al, mn))
new_model_keys = []
for al, mn in self.to_state.models.keys():
model = new_apps.get_model(al, mn)
if not model._meta.proxy and model._meta.managed:
new_model_keys.append((al, mn))
def _rel_agnostic_fields_def(fields):
"""

27
tests/migrations/test_autodetector.py
View File

@ -24,6 +24,8 @@ class AutodetectorTests(TestCase):
author_with_custom_user = ModelState("testapp", "Author", [("id", models.AutoField(primary_key=True)), ("name", models.CharField(max_length=200)), ("user", models.ForeignKey("thirdapp.CustomUser"))])
author_proxy = ModelState("testapp", "AuthorProxy", [], {"proxy": True}, ("testapp.author", ))
author_proxy_notproxy = ModelState("testapp", "AuthorProxy", [], {}, ("testapp.author", ))
author_unmanaged = ModelState("testapp", "AuthorUnmanaged", [], {"managed": False}, ("testapp.author", ))
author_unmanaged_managed = ModelState("testapp", "AuthorUnmanaged", [], {}, ("testapp.author", ))
publisher = ModelState("testapp", "Publisher", [("id", models.AutoField(primary_key=True)), ("name", models.CharField(max_length=100))])
publisher_with_author = ModelState("testapp", "Publisher", [("id", models.AutoField(primary_key=True)), ("author", models.ForeignKey("testapp.Author")), ("name", models.CharField(max_length=100))])
publisher_with_book = ModelState("testapp", "Publisher", [("id", models.AutoField(primary_key=True)), ("author", models.ForeignKey("otherapp.Book")), ("name", models.CharField(max_length=100))])
@ -488,6 +490,31 @@ class AutodetectorTests(TestCase):
self.assertEqual(action.__class__.__name__, "CreateModel")
self.assertEqual(action.name, "AuthorProxy")
def test_unmanaged_ignorance(self):
"Tests that the autodetector correctly ignores managed models"
# First, we test adding an unmanaged model
before = self.make_project_state([self.author_empty])
after = self.make_project_state([self.author_empty, self.author_unmanaged])
autodetector = MigrationAutodetector(before, after)
changes = autodetector._detect_changes()
# Right number of migrations?
self.assertEqual(len(changes), 0)
# Now, we test turning an unmanaged model into a managed model
before = self.make_project_state([self.author_empty, self.author_unmanaged])
after = self.make_project_state([self.author_empty, self.author_unmanaged_managed])
autodetector = MigrationAutodetector(before, after)
changes = autodetector._detect_changes()
# Right number of migrations?
self.assertEqual(len(changes['testapp']), 1)
# Right number of actions?
migration = changes['testapp'][0]
self.assertEqual(len(migration.operations), 1)
# Right action?
action = migration.operations[0]
self.assertEqual(action.__class__.__name__, "CreateModel")
self.assertEqual(action.name, "AuthorUnmanaged")
@override_settings(AUTH_USER_MODEL="thirdapp.CustomUser")
def test_swappable(self):
before = self.make_project_state([self.custom_user])