South - FKs between apps

tests/test_second_app/tests.py

@@ -73,13 +73,15 @@ def test_both_migrated(self):
         self.assertEqual(mymodel.number, 10)
 
 
-# TODO: conclude if this is permanent, or if there is a workaround.
 @unittest.skipIf(django.VERSION < (1, 7), 'Not supported by South')
 class SecondAppFKToTestAppMigrationTest(MigrationTest):
     """We don't actually migrate anything here, before and after are the
     same. We just check that the model we load can be linked and
     saved, even if they come from different apps.
 
+    See SecondAppFKToTestAppUsingPksMigrationTest for a
+    south-supported approach.
+
     """
 
     app_name = 'test_second_app'
@@ -98,6 +100,28 @@ def test_save_and_reload_model(self):
         mymodelsecond.save()
 
 
+class SecondAppFKToTestAppUsingPksMigrationTest(MigrationTest):
+    """Copy of SecondAppFKToTestAppMigrationTest but uses pks instead of
+    django's orm magic. Also have to declare in before and after the
+    migrations for all the models that are used.
+
+    """
+
+    before = [('test_app', '0005'), ('test_second_app', '0003')]
+    after = [('test_app', '0005'), ('test_second_app', '0003')]
+
+    def test_save_and_reload_model(self):
+        MyModelSecond = self.get_model_before('test_second_app.MyModel')
+        MyModelFirst = self.get_model_before('test_app.MyModel')
+
+        mymodelfirst = MyModelFirst()
+        mymodelfirst.save()
+
+        mymodelsecond = MyModelSecond()
+        mymodelsecond.my_model_id = mymodelfirst.pk
+        mymodelsecond.save()
+
+
 class MigrateFromZero(MigrationTest):
     before = [('test_app', '0002'), ('test_second_app', 'zero')]
     after = [('test_app', '0002'), ('test_second_app', '0001')]