From 25e01d0761abbb78a8b0983e6a1d224767f5a000 Mon Sep 17 00:00:00 2001
From: Bruno Alla <alla.brunoo@gmail.com>
Date: Mon, 14 Oct 2024 19:06:37 +0100
Subject: [PATCH] Default nullable fields to null in unique constraints checks

---
 rest_framework/serializers.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py
index b1b7b6477..f37bd3a3d 100644
--- a/rest_framework/serializers.py
+++ b/rest_framework/serializers.py
@@ -1490,6 +1490,8 @@ class ModelSerializer(Serializer):
                 default = timezone.now
             elif unique_constraint_field.has_default():
                 default = unique_constraint_field.default
+            elif unique_constraint_field.null:
+                default = None
             else:
                 default = empty