Fixed #28330 -- Prevented passing positional arguments to an Index.

Thanks Tim Graham for the review.

2 files changed, 5 insertions, 5 deletions

diff --git a/django/contrib/postgres/indexes.py b/django/contrib/postgres/indexes.py
index 7c687987db..b7ca1d3dc4 100644
--- a/django/contrib/postgres/indexes.py
+++ b/django/contrib/postgres/indexes.py
@@ -11,11 +11,11 @@ class BrinIndex(Index):
     # applicable.
     max_name_length = 31
 
-    def __init__(self, fields=[], name=None, pages_per_range=None):
+    def __init__(self, *, pages_per_range=None, **kwargs):
         if pages_per_range is not None and pages_per_range <= 0:
             raise ValueError('pages_per_range must be None or a positive integer')
         self.pages_per_range = pages_per_range
-        super().__init__(fields, name)
+        super().__init__(**kwargs)
 
     def deconstruct(self):
         path, args, kwargs = super().deconstruct()
@@ -33,10 +33,10 @@ class BrinIndex(Index):
 class GinIndex(Index):
     suffix = 'gin'
 
-    def __init__(self, fields=[], name=None, fastupdate=None, gin_pending_list_limit=None):
+    def __init__(self, *, fastupdate=None, gin_pending_list_limit=None, **kwargs):
         self.fastupdate = fastupdate
         self.gin_pending_list_limit = gin_pending_list_limit
-        super().__init__(fields, name)
+        super().__init__(**kwargs)
 
     def deconstruct(self):
         path, args, kwargs = super().deconstruct()
diff --git a/django/db/models/indexes.py b/django/db/models/indexes.py
index 7e5b8bca30..4c1aeccfab 100644
--- a/django/db/models/indexes.py
+++ b/django/db/models/indexes.py
@@ -11,7 +11,7 @@ class Index:
     # cross-database compatibility with Oracle)
     max_name_length = 30
 
-    def __init__(self, fields=[], name=None):
+    def __init__(self, *, fields=[], name=None):
         if not isinstance(fields, list):
             raise ValueError('Index.fields must be a list.')
         if not fields: