Only run hasher migration on non-swapped models.

Author: josephabrahams

oauth2_provider/migrations/0006_alter_application_client_secret.py

@@ -1,18 +1,17 @@
 from django.db import migrations
-from django.contrib.auth.hashers import identify_hasher, make_password
-import logging
 import oauth2_provider.generators
 import oauth2_provider.models
-
+from oauth2_provider.settings import oauth2_settings
 
 def forwards_func(apps, schema_editor):
     """
     Forward migration touches every application.client_secret which will cause it to be hashed if not already the case.
     """
-    Application = apps.get_model('oauth2_provider', 'application')
-    applications = Application.objects.all()
-    for application in applications:
-        application.save(update_fields=['client_secret'])
+    if oauth2_settings.APPLICATION_MODEL == 'oauth2_provider.Application':
+        Application = apps.get_model('oauth2_provider', 'application')
+        applications = Application.objects.all()
+        for application in applications:
+            application.save(update_fields=['client_secret'])
 
 
 class Migration(migrations.Migration):