diff --git a/django/db/migrations/autodetector.py b/django/db/migrations/autodetector.py index 3b9caee8fc9..acdfa2a6689 100644 --- a/django/db/migrations/autodetector.py +++ b/django/db/migrations/autodetector.py @@ -5,6 +5,7 @@ import datetime from django.utils import six from django.db import models +from django.conf import settings from django.db.migrations import operations from django.db.migrations.migration import Migration from django.db.migrations.questioner import MigrationQuestioner @@ -345,6 +346,27 @@ class MigrationAutodetector(object): operation._auto_deps = dependencies or [] self.generated_operations.setdefault(app_label, []).append(operation) + def swappable_first_key(self, item): + """ + Sorting key function that places potential swappable models first in + lists of created models (only real way to solve #22783) + """ + try: + model = self.new_apps.get_model(item[0], item[1]) + base_names = [base.__name__ for base in model.__bases__] + string_version = "%s.%s" % (item[0], item[1]) + if ( + model._meta.swappable or + "AbstractUser" in base_names or + "AbstractBaseUser" in base_names or + settings.AUTH_USER_MODEL.lower() == string_version.lower() + ): + return ("___" + item[0], "___" + item[1]) + except LookupError: + pass + return item + + def generate_renamed_models(self): """ Finds any renamed models, and generates the operations for them, @@ -388,7 +410,7 @@ class MigrationAutodetector(object): that might be deferred (e.g. unique_together, index_together) """ added_models = set(self.new_model_keys) - set(self.old_model_keys) - for app_label, model_name in sorted(added_models): + for app_label, model_name in sorted(added_models, key=self.swappable_first_key): model_state = self.to_state.models[app_label, model_name] # Gather related fields related_fields = {} diff --git a/tests/migrations/test_autodetector.py b/tests/migrations/test_autodetector.py index b1233dc41f1..b09402bd829 100644 --- a/tests/migrations/test_autodetector.py +++ b/tests/migrations/test_autodetector.py @@ -5,6 +5,7 @@ from django.db.migrations.questioner import MigrationQuestioner from django.db.migrations.state import ProjectState, ModelState from django.db.migrations.graph import MigrationGraph from django.db import models +from django.contrib.auth.models import AbstractBaseUser class DeconstructableObject(object): @@ -67,7 +68,9 @@ class AutodetectorTests(TestCase): book_unique_3 = ModelState("otherapp", "Book", [("id", models.AutoField(primary_key=True)), ("newfield", models.IntegerField()), ("author", models.ForeignKey("testapp.Author")), ("title", models.CharField(max_length=200))], {"unique_together": [("title", "newfield")]}) attribution = ModelState("otherapp", "Attribution", [("id", models.AutoField(primary_key=True)), ("author", models.ForeignKey("testapp.Author")), ("book", models.ForeignKey("otherapp.Book"))]) edition = ModelState("thirdapp", "Edition", [("id", models.AutoField(primary_key=True)), ("book", models.ForeignKey("otherapp.Book"))]) - custom_user = ModelState("thirdapp", "CustomUser", [("id", models.AutoField(primary_key=True)), ("username", models.CharField(max_length=255))]) + custom_user = ModelState("thirdapp", "CustomUser", [("id", models.AutoField(primary_key=True)), ("username", models.CharField(max_length=255))], bases=(AbstractBaseUser, )) + custom_user_no_inherit = ModelState("thirdapp", "CustomUser", [("id", models.AutoField(primary_key=True)), ("username", models.CharField(max_length=255))]) + aardvark = ModelState("thirdapp", "Aardvark", [("id", models.AutoField(primary_key=True))]) knight = ModelState("eggs", "Knight", [("id", models.AutoField(primary_key=True))]) rabbit = ModelState("eggs", "Rabbit", [("id", models.AutoField(primary_key=True)), ("knight", models.ForeignKey("eggs.Knight")), ("parent", models.ForeignKey("eggs.Rabbit"))], {"unique_together": [("parent", "knight")]}) @@ -913,3 +916,34 @@ class AutodetectorTests(TestCase): self.assertOperationAttributes(changes, 'testapp', 0, 1, name="author", order_with_respect_to="book") # Make sure the _order field is not in the CreateModel fields self.assertNotIn("_order", [name for name, field in changes['testapp'][0].operations[0].fields]) + + def test_swappable_first_inheritance(self): + """ + Tests that swappable models get their CreateModel first. + """ + # Make state + before = self.make_project_state([]) + after = self.make_project_state([self.custom_user, self.aardvark]) + autodetector = MigrationAutodetector(before, after) + changes = autodetector._detect_changes() + # Right number of migrations? + self.assertNumberMigrations(changes, 'thirdapp', 1) + self.assertOperationTypes(changes, 'thirdapp', 0, ["CreateModel", "CreateModel"]) + self.assertOperationAttributes(changes, 'thirdapp', 0, 0, name="CustomUser") + self.assertOperationAttributes(changes, 'thirdapp', 0, 1, name="Aardvark") + + @override_settings(AUTH_USER_MODEL="thirdapp.CustomUser") + def test_swappable_first_setting(self): + """ + Tests that swappable models get their CreateModel first. + """ + # Make state + before = self.make_project_state([]) + after = self.make_project_state([self.custom_user_no_inherit, self.aardvark]) + autodetector = MigrationAutodetector(before, after) + changes = autodetector._detect_changes() + # Right number of migrations? + self.assertNumberMigrations(changes, 'thirdapp', 1) + self.assertOperationTypes(changes, 'thirdapp', 0, ["CreateModel", "CreateModel"]) + self.assertOperationAttributes(changes, 'thirdapp', 0, 0, name="CustomUser") + self.assertOperationAttributes(changes, 'thirdapp', 0, 1, name="Aardvark")