[1.8.x] Fixed #24698, #24712 -- Added ForeignKey.get_db_prep_value()

Fixed crashes with ForeignKey to UUIDField and inheritance with UUIDField
primary keys.

2 files changed, 14 insertions, 1 deletions

diff --git a/tests/model_fields/models.py b/tests/model_fields/models.py
index 620fa9ec5d..2141610b0e 100644
--- a/tests/model_fields/models.py
+++ b/tests/model_fields/models.py
@@ -375,3 +375,11 @@ class PrimaryKeyUUIDModel(models.Model):
 
 class RelatedToUUIDModel(models.Model):
     uuid_fk = models.ForeignKey('PrimaryKeyUUIDModel')
+
+
+class UUIDChild(PrimaryKeyUUIDModel):
+    pass
+
+
+class UUIDGrandchild(UUIDChild):
+    pass
diff --git a/tests/model_fields/test_uuid.py b/tests/model_fields/test_uuid.py
index 7ce98a0852..21c2869edf 100644
--- a/tests/model_fields/test_uuid.py
+++ b/tests/model_fields/test_uuid.py
@@ -6,7 +6,8 @@ from django.db import models
 from django.test import TestCase
 
 from .models import (
-    NullableUUIDModel, PrimaryKeyUUIDModel, RelatedToUUIDModel, UUIDModel,
+    NullableUUIDModel, PrimaryKeyUUIDModel, RelatedToUUIDModel, UUIDGrandchild,
+    UUIDModel,
 )
 
 
@@ -146,3 +147,7 @@ class TestAsPrimaryKey(TestCase):
         RelatedToUUIDModel.objects.update(uuid_fk=u2.pk)
         r.refresh_from_db()
         self.assertEqual(r.uuid_fk, u2)
+
+    def test_two_level_foreign_keys(self):
+        # exercises ForeignKey.get_db_prep_value()
+        UUIDGrandchild().save()