Fixed #27996 -- Added RandomUUID function and CryptoExtension to contrib.postgres.

tests/postgres_tests/migrations/0001_setup_extensions.py

@@ -4,13 +4,14 @@ from django.db import migrations
 
 try:
     from django.contrib.postgres.operations import (
-        BtreeGinExtension, CITextExtension, CreateExtension, HStoreExtension,
-        TrigramExtension, UnaccentExtension,
+        BtreeGinExtension, CITextExtension, CreateExtension, CryptoExtension,
+        HStoreExtension, TrigramExtension, UnaccentExtension,
     )
 except ImportError:
     BtreeGinExtension = mock.Mock()
     CITextExtension = mock.Mock()
     CreateExtension = mock.Mock()
+    CryptoExtension = mock.Mock()
     HStoreExtension = mock.Mock()
     TrigramExtension = mock.Mock()
     UnaccentExtension = mock.Mock()
@@ -24,6 +25,7 @@ class Migration(migrations.Migration):
         # Ensure CreateExtension quotes extension names by creating one with a
         # dash in its name.
         CreateExtension('uuid-ossp'),
+        CryptoExtension(),
         HStoreExtension(),
         TrigramExtension(),
         UnaccentExtension(),

tests/postgres_tests/migrations/0002_create_test_models.py

@@ -191,6 +191,13 @@ class Migration(migrations.Migration):
                 ('when', models.DateTimeField(null=True, default=None)),
             ]
         ),
+        migrations.CreateModel(
+            name='UUIDTestModel',
+            fields=[
+                ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
+                ('uuid', models.UUIDField(default=None, null=True)),
+            ]
+        ),
         migrations.CreateModel(
             name='RangesModel',
             fields=[

tests/postgres_tests/models.py

@@ -171,3 +171,7 @@ class StatTestModel(models.Model):
 
 class NowTestModel(models.Model):
     when = models.DateTimeField(null=True, default=None)
+
+
+class UUIDTestModel(models.Model):
+    uuid = models.UUIDField(default=None, null=True)

tests/postgres_tests/test_functions.py

@@ -1,10 +1,11 @@
+import uuid
 from datetime import datetime
 from time import sleep
 
-from django.contrib.postgres.functions import TransactionNow
+from django.contrib.postgres.functions import RandomUUID, TransactionNow
 
 from . import PostgreSQLTestCase
-from .models import NowTestModel
+from .models import NowTestModel, UUIDTestModel
 
 
 class TestTransactionNow(PostgreSQLTestCase):
@@ -26,3 +27,15 @@ class TestTransactionNow(PostgreSQLTestCase):
 
         self.assertIsInstance(m1.when, datetime)
         self.assertEqual(m1.when, m2.when)
+
+
+class TestRandomUUID(PostgreSQLTestCase):
+
+    def test_random_uuid(self):
+        m1 = UUIDTestModel.objects.create()
+        m2 = UUIDTestModel.objects.create()
+        UUIDTestModel.objects.update(uuid=RandomUUID())
+        m1.refresh_from_db()
+        m2.refresh_from_db()
+        self.assertIsInstance(m1.uuid, uuid.UUID)
+        self.assertNotEqual(m1.uuid, m2.uuid)