Fixed #30350 -- Prevented recreation of migration for operations with a range object.

Thanks to Mariusz Felisiak for helping with the patch.

django/db/migrations/serializer.py

@@ -284,7 +284,7 @@ class Serializer:
         (datetime.date, datetime.timedelta, datetime.time): DateTimeSerializer,
         SettingsReference: SettingsReferenceSerializer,
         float: FloatSerializer,
-        (bool, int, type(None), bytes, str): BaseSimpleSerializer,
+        (bool, int, type(None), bytes, str, range): BaseSimpleSerializer,
         decimal.Decimal: DecimalSerializer,
         (functools.partial, functools.partialmethod): FunctoolsPartialSerializer,
         (types.FunctionType, types.BuiltinFunctionType, types.MethodType): FunctionTypeSerializer,

docs/releases/2.2.1.txt

@@ -25,3 +25,7 @@ Bugfixes
 
 * Fixed a regression in Django 2.2 that caused a single instance fast-delete
   to not set the primary key to ``None`` (:ticket:`30330`).
+
+* Prevented :djadmin:`makemigrations` from generating infinite migrations for
+  check constraints and partial indexes when ``condition`` contains
+  a :class:`~python:range` object (:ticket:`30350`).

tests/migrations/test_writer.py

@@ -451,6 +451,11 @@ class WriterTests(SimpleTestCase):
         self.assertSerializedEqual(one_item_tuple)
         self.assertSerializedEqual(many_items_tuple)
 
+    def test_serialize_range(self):
+        string, imports = MigrationWriter.serialize(range(1, 5))
+        self.assertEqual(string, 'range(1, 5)')
+        self.assertEqual(imports, set())
+
     def test_serialize_builtins(self):
         string, imports = MigrationWriter.serialize(range)
         self.assertEqual(string, 'range')