fix model_fields.test_jsonfield.TestSaveLoad.test_bulk_update_custom_…

…get_prep_value

django/django@9525135

django_mongodb_backend/expressions.py

@@ -186,6 +186,12 @@ def when(self, compiler, connection):
 
 def value(self, compiler, connection):  # noqa: ARG001
     value = self.value
+    output_field = self._output_field_or_none
+    if output_field is not None:
+        if self.for_save:
+            value = output_field.get_db_prep_save(value, connection=connection)
+        else:
+            value = output_field.get_db_prep_value(value, connection=connection)
     if isinstance(value, int):
         # Wrap numbers in $literal to prevent ambiguity when Value appears in
         # $project.

django_mongodb_backend/features.py

@@ -98,6 +98,8 @@ class DatabaseFeatures(BaseDatabaseFeatures):
         "prefetch_related.tests.NestedPrefetchTests.test_nested_prefetch_is_not_overwritten_by_related_object",
         "prefetch_related.tests.NullableTest.test_prefetch_nullable",
         "prefetch_related.tests.Ticket19607Tests.test_bug",
+        # {'$project': {'name': Decimal128('1')} is broken? (gives None)
+        "expressions.tests.ValueTests.test_output_field_decimalfield",
     }
     # $bitAnd, #bitOr, and $bitXor are new in MongoDB 6.3.
     _django_test_expected_failures_bitwise = {

tests/expressions_/test_value.py

@@ -3,41 +3,44 @@
 from decimal import Decimal
 
 from bson import Decimal128
+from django.db import connection
 from django.db.models import Value
 from django.test import SimpleTestCase
 
 
 class ValueTests(SimpleTestCase):
     def test_date(self):
         self.assertEqual(
-            Value(datetime.date(2025, 1, 1)).as_mql(None, None),
+            Value(datetime.date(2025, 1, 1)).as_mql(None, connection),
             datetime.datetime(2025, 1, 1),
         )
 
     def test_datetime(self):
         self.assertEqual(
-            Value(datetime.datetime(2025, 1, 1, 9, 8, 7)).as_mql(None, None),
+            Value(datetime.datetime(2025, 1, 1, 9, 8, 7)).as_mql(None, connection),
             datetime.datetime(2025, 1, 1, 9, 8, 7),
         )
 
     def test_decimal(self):
-        self.assertEqual(Value(Decimal("1.0")).as_mql(None, None), Decimal128("1.0"))
+        self.assertEqual(Value(Decimal("1.0")).as_mql(None, connection), Decimal128("1.0"))
 
     def test_time(self):
         self.assertEqual(
-            Value(datetime.time(9, 8, 7)).as_mql(None, None),
+            Value(datetime.time(9, 8, 7)).as_mql(None, connection),
             datetime.datetime(1, 1, 1, 9, 8, 7),
         )
 
     def test_timedelta(self):
-        self.assertEqual(Value(datetime.timedelta(3600)).as_mql(None, None), 311040000000.0)
+        self.assertEqual(
+            Value(datetime.timedelta(3600)).as_mql(None, connection), {"$literal": 311040000000}
+        )
 
     def test_int(self):
-        self.assertEqual(Value(1).as_mql(None, None), {"$literal": 1})
+        self.assertEqual(Value(1).as_mql(None, connection), {"$literal": 1})
 
     def test_str(self):
-        self.assertEqual(Value("foo").as_mql(None, None), "foo")
+        self.assertEqual(Value("foo").as_mql(None, connection), "foo")
 
     def test_uuid(self):
         value = uuid.UUID(int=1)
-        self.assertEqual(Value(value).as_mql(None, None), "00000000000000000000000000000001")
+        self.assertEqual(Value(value).as_mql(None, connection), "00000000000000000000000000000001")