Make Value wrap lists in $literal

Author: timgraham

django_mongodb_backend/expressions.py

@@ -190,9 +190,9 @@ def when(self, compiler, connection):
 
 def value(self, compiler, connection):  # noqa: ARG001
     value = self.value
-    if isinstance(value, int):
-        # Wrap numbers in $literal to prevent ambiguity when Value appears in
-        # $project.
+    if isinstance(value, list | int):
+        # Wrap lists & numbers in $literal to prevent ambiguity when Value
+        # appears in $project.
         return {"$literal": value}
     if isinstance(value, Decimal):
         return Decimal128(value)

tests/expressions_/test_value.py

@@ -23,6 +23,9 @@ def test_datetime(self):
     def test_decimal(self):
         self.assertEqual(Value(Decimal("1.0")).as_mql(None, None), Decimal128("1.0"))
 
+    def test_list(self):
+        self.assertEqual(Value([1, 2]).as_mql(None, None), {"$literal": [1, 2]})
+
     def test_time(self):
         self.assertEqual(
             Value(datetime.time(9, 8, 7)).as_mql(None, None),