Migration autodetector now corerctly deals with proxy models

1 files changed, 27 insertions, 0 deletions

diff --git a/tests/migrations/test_autodetector.py b/tests/migrations/test_autodetector.py
index de3b156ba6..a0ecd540cd 100644
--- a/tests/migrations/test_autodetector.py
+++ b/tests/migrations/test_autodetector.py
@@ -16,6 +16,8 @@ class AutodetectorTests(TestCase):
     author_name_longer = ModelState("testapp", "Author", [("id", models.AutoField(primary_key=True)), ("name", models.CharField(max_length=400))])
     author_name_renamed = ModelState("testapp", "Author", [("id", models.AutoField(primary_key=True)), ("names", models.CharField(max_length=200))])
     author_with_book = ModelState("testapp", "Author", [("id", models.AutoField(primary_key=True)), ("name", models.CharField(max_length=200)), ("book", models.ForeignKey("otherapp.Book"))])
+    author_proxy = ModelState("testapp", "AuthorProxy", [], {"proxy": True}, ("testapp.author", ))
+    author_proxy_notproxy = ModelState("testapp", "AuthorProxy", [], {}, ("testapp.author", ))
     other_pony = ModelState("otherapp", "Pony", [("id", models.AutoField(primary_key=True))])
     other_stable = ModelState("otherapp", "Stable", [("id", models.AutoField(primary_key=True))])
     third_thing = ModelState("thirdapp", "Thing", [("id", models.AutoField(primary_key=True))])
@@ -272,3 +274,28 @@ class AutodetectorTests(TestCase):
         self.assertEqual(action.__class__.__name__, "AlterUniqueTogether")
         self.assertEqual(action.name, "book")
         self.assertEqual(action.unique_together, set([("title", "author")]))
+
+    def test_proxy_ignorance(self):
+        "Tests that the autodetector correctly ignores proxy models"
+        # First, we test adding a proxy model
+        before = self.make_project_state([self.author_empty])
+        after = self.make_project_state([self.author_empty, self.author_proxy])
+        autodetector = MigrationAutodetector(before, after)
+        changes = autodetector._detect_changes()
+        # Right number of migrations?
+        self.assertEqual(len(changes), 0)
+
+        # Now, we test turning a proxy model into a non-proxy model
+        before = self.make_project_state([self.author_empty, self.author_proxy])
+        after = self.make_project_state([self.author_empty, self.author_proxy_notproxy])
+        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, "AuthorProxy")