Fixed #22030 -- Don't assume that all fields have a swappable_setting attribute.

1 files changed, 2 insertions, 1 deletions

diff --git a/django/db/migrations/autodetector.py b/django/db/migrations/autodetector.py
index 2b8759b29a..868d2bdc0f 100644
--- a/django/db/migrations/autodetector.py
+++ b/django/db/migrations/autodetector.py
@@ -233,7 +233,8 @@ class MigrationAutodetector(object):
                         field=field,
                     )
                 )
-                swappable_setting = new_apps.get_model(app_label, model_name)._meta.get_field_by_name(field_name)[0].swappable_setting
+                new_field = new_apps.get_model(app_label, model_name)._meta.get_field_by_name(field_name)[0]
+                swappable_setting = getattr(new_field, 'swappable_setting', None)
                 if swappable_setting is not None:
                     self.add_swappable_dependency(app_label, swappable_setting)
         # Old fields