From 2da007737cda936ef2ee87271bf9e69eb93cd3fe Mon Sep 17 00:00:00 2001
From: Mark Gensler <mark.gensler@protonmail.com>
Date: Tue, 25 Jun 2024 15:04:48 +0100
Subject: [5.1.x] Fixed #35560 -- Made Model.full_clean() ignore
 GeneratedFields for constraints.

Accessing generated field values on unsaved models caused a crash when
validating CheckConstraints and UniqueConstraints with expressions.

Backport of 1005c2abd1ef0c156f449641e38c33e473989d37 from main.
---
 django/db/models/base.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'django')

diff --git a/django/db/models/base.py b/django/db/models/base.py
index 97fcdb81a4..b118b675cc 100644
--- a/django/db/models/base.py
+++ b/django/db/models/base.py
@@ -1340,7 +1340,7 @@ class Model(AltersData, metaclass=ModelBase):
         field_map = {
             field.name: Value(getattr(self, field.attname), field)
             for field in meta.local_concrete_fields
-            if field.name not in exclude
+            if field.name not in exclude and not field.generated
         }
         if "pk" not in exclude:
             field_map["pk"] = Value(self.pk, meta.pk)
-- 
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