Refs #27869 -- Omitted field kwargs from GinIndex.deconstruct() if they're None.

django/contrib/postgres/indexes.py

@@ -42,8 +42,10 @@ class GinIndex(Index):
 
     def deconstruct(self):
         path, args, kwargs = super().deconstruct()
-        kwargs['fastupdate'] = self.fastupdate
-        kwargs['gin_pending_list_limit'] = self.gin_pending_list_limit
+        if self.fastupdate is not None:
+            kwargs['fastupdate'] = self.fastupdate
+        if self.gin_pending_list_limit is not None:
+            kwargs['gin_pending_list_limit'] = self.gin_pending_list_limit
         return path, args, kwargs
 
     def create_sql(self, model, schema_editor, using=''):

tests/postgres_tests/test_indexes.py

@@ -84,6 +84,13 @@ class GinIndexTests(PostgreSQLTestCase):
             }
         )
 
+    def test_deconstruct_no_args(self):
+        index = GinIndex(fields=['title'], name='test_title_gin')
+        path, args, kwargs = index.deconstruct()
+        self.assertEqual(path, 'django.contrib.postgres.indexes.GinIndex')
+        self.assertEqual(args, ())
+        self.assertEqual(kwargs, {'fields': ['title'], 'name': 'test_title_gin'})
+
 
 class SchemaTests(PostgreSQLTestCase):