[3.0.x] Fixed #31021 -- Fixed proxy model permissions data migration crash with a multiple databases setup.

Regression in 98296f86b340c8c9c968375d59f1d3a3479e60c2.

Backport of e8fcdaad5c428878d0a5d6ba820d957013f75595 from master

1 files changed, 6 insertions, 4 deletions

diff --git a/django/contrib/auth/migrations/0011_update_proxy_permissions.py b/django/contrib/auth/migrations/0011_update_proxy_permissions.py
index c3f617f438..7409ea1254 100644
--- a/django/contrib/auth/migrations/0011_update_proxy_permissions.py
+++ b/django/contrib/auth/migrations/0011_update_proxy_permissions.py
@@ -23,6 +23,7 @@ def update_proxy_model_permissions(apps, schema_editor, reverse=False):
     style = color_style()
     Permission = apps.get_model('auth', 'Permission')
     ContentType = apps.get_model('contenttypes', 'ContentType')
+    alias = schema_editor.connection.alias
     for Model in apps.get_models():
         opts = Model._meta
         if not opts.proxy:
@@ -34,13 +35,14 @@ def update_proxy_model_permissions(apps, schema_editor, reverse=False):
         permissions_query = Q(codename__in=proxy_default_permissions_codenames)
         for codename, name in opts.permissions:
             permissions_query = permissions_query | Q(codename=codename, name=name)
-        concrete_content_type = ContentType.objects.get_for_model(Model, for_concrete_model=True)
-        proxy_content_type = ContentType.objects.get_for_model(Model, for_concrete_model=False)
+        content_type_manager = ContentType.objects.db_manager(alias)
+        concrete_content_type = content_type_manager.get_for_model(Model, for_concrete_model=True)
+        proxy_content_type = content_type_manager.get_for_model(Model, for_concrete_model=False)
         old_content_type = proxy_content_type if reverse else concrete_content_type
         new_content_type = concrete_content_type if reverse else proxy_content_type
         try:
-            with transaction.atomic():
-                Permission.objects.filter(
+            with transaction.atomic(using=alias):
+                Permission.objects.using(alias).filter(
                     permissions_query,
                     content_type=old_content_type,
                 ).update(content_type=new_content_type)