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

…odels.

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 42336c8 from master
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commit 39fc8d4b8e94d9e019148ce9d287e72b3363a7bf 1 parent 1cb6729
@loic loic authored timgraham committed
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21 django/db/migrations/autodetector.py
@@ -51,16 +51,17 @@ def _detect_changes(self):
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):
"""
View
27 tests/migrations/test_autodetector.py
@@ -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 @@ def test_proxy_ignorance(self):
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])
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