Ticket #10038: has_changed.diff

django/forms/models.py

@@ -407 +407 @@
                 self.deleted_objects.append(obj)
                 obj.delete()
             else:
-                if form.changed_data:
+                if form.has_changed():
                     self.changed_objects.append((obj, form.changed_data))
                     saved_instances.append(self.save_existing(form, obj, commit=commit))
                     if not commit: