Ticket #23305: ticket_23305.diff

new file tests/migrations/migrations_test_apps/invisible_migration_error/__init__.py

@@ +1 @@
+from __future__ import absolute_import
+from .models import Author
+
+default_app_config = 'migrations.migrations_test_apps.invisible_migration_error.apps.DemoConfig'

new file tests/migrations/migrations_test_apps/invisible_migration_error/apps.py

@@ +1 @@
+from __future__ import absolute_import
+
+from django.apps import AppConfig
+
+
+class DemoConfig(AppConfig):
+    name = "migrations.migrations_test_apps.invisible_migration_error"
+    label = 'custom_demo'
+    verbose_name = "demo"

new file tests/migrations/migrations_test_apps/invisible_migration_error/models.py

@@ +1 @@
+from django.db import models
+
+
+class Author(models.Model):
+    name = models.CharField(max_length=255)

tests/migrations/test_commands.py

@@ -539 +539 @@
             questioner.input = old_input
             if os.path.exists(merge_file):
                 os.remove(merge_file)
+
+    @override_system_checks([])
+    @override_settings(
+        INSTALLED_APPS=[
+            "migrations.migrations_test_apps.invisible_migration_error", ])
+    def test_makemigrations_ticket_23305(self):
+        stdout = six.StringIO()
+        call_command("makemigrations", stdout=stdout)
+        initial_file = os.path.join(self.test_dir, "migrations_test_apps",
+            "invisible_migration_error", "migrations", "0001_initial.py")
+        file_exists = os.path.exists(initial_file)
+        try:
+            # Cleanup
+            os.remove(initial_file)
+        except:
+            pass
+        self.assertNotIn("No changes detected", stdout.getvalue())
+        # Check for existing 0001_initial.py file in migration folder
+        self.assertTrue(file_exists)