Fixed #18306 -- Made deferred models issue update_fields on save

Deferred models now automatically update only the fields which are
loaded from the db (with .only() or .defer()). In addition, any field
set manually after the load is updated on save.

1 files changed, 1 insertions, 0 deletions

diff --git a/tests/modeltests/update_only_fields/models.py b/tests/modeltests/update_only_fields/models.py
index 01184f715b..bf5dd99166 100644
--- a/tests/modeltests/update_only_fields/models.py
+++ b/tests/modeltests/update_only_fields/models.py
@@ -15,6 +15,7 @@ class Account(models.Model):
 class Person(models.Model):
     name = models.CharField(max_length=20)
     gender = models.CharField(max_length=1, choices=GENDER_CHOICES)
+    pid = models.IntegerField(null=True, default=None)
 
     def __str__(self):
         return self.name