providers/proxy: fix defaults for old proxy providers

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

authentik/providers/proxy/migrations/0014_proxy_v2.py

@@ -0,0 +1,24 @@
+# Generated by Django 3.2.6 on 2021-09-09 11:24
+
+from django.apps.registry import Apps
+from django.db import migrations
+from django.db.backends.base.schema import BaseDatabaseSchemaEditor
+
+
+def migrate_defaults(apps: Apps, schema_editor: BaseDatabaseSchemaEditor):
+    from authentik.providers.proxy.models import JWTAlgorithms
+
+    db_alias = schema_editor.connection.alias
+    ProxyProvider = apps.get_model("authentik_providers_proxy", "proxyprovider")
+    for provider in ProxyProvider.objects.using(db_alias).filter(jwt_alg=JWTAlgorithms.RS256):
+        provider.set_oauth_defaults()
+        provider.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("authentik_providers_proxy", "0013_mode"),
+    ]
+
+    operations = [migrations.RunPython(migrate_defaults)]