Refs #25809 -- Made a few late review comments for BrinIndex.

django/contrib/postgres/indexes.py

@@ -9,10 +9,10 @@ class BrinIndex(Index):
     suffix = 'brin'
 
     def __init__(self, fields=[], name=None, pages_per_range=None):
-        if pages_per_range is not None and not (isinstance(pages_per_range, int) and pages_per_range > 0):
-            raise ValueError('pages_per_range must be None or a positive integer for BRIN indexes')
+        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
-        return super(BrinIndex, self).__init__(fields, name)
+        super(BrinIndex, self).__init__(fields, name)
 
     def __repr__(self):
         if self.pages_per_range is not None:

django/db/models/indexes.py

@@ -60,9 +60,9 @@ class Index(object):
             'extra': tablespace_sql,
         }
 
-    def create_sql(self, model, schema_editor, using='', parameters=None):
+    def create_sql(self, model, schema_editor, using=''):
         sql_create_index = schema_editor.sql_create_index
-        sql_parameters = parameters or self.get_sql_create_template_values(model, schema_editor, using)
+        sql_parameters = self.get_sql_create_template_values(model, schema_editor, using)
         return sql_create_index % sql_parameters
 
     def remove_sql(self, model, schema_editor):

docs/ref/contrib/postgres/indexes.txt

@@ -12,12 +12,12 @@ available from the ``django.contrib.postgres.indexes`` module.
 ``BrinIndex``
 =============
 
-.. class:: BrinIndex(pages_per_range=None)
+.. class:: BrinIndex(fields=[], name=None, pages_per_range=None)
 
     Creates a `BRIN index
-    <https://www.postgresql.org/docs/current/static/brin-intro.html>`_. For
-    performance considerations and use cases of the index, please consult the
-    documentation.
+    <https://www.postgresql.org/docs/current/static/brin-intro.html>`_.
+
+    The ``pages_per_range`` argument takes a positive integer.
 
 ``GinIndex``
 ============

tests/postgres_tests/test_indexes.py

@@ -27,7 +27,7 @@ class BrinIndexTests(PostgreSQLTestCase):
         self.assertEqual(args, ())
         self.assertEqual(kwargs, {'fields': ['title'], 'name': 'test_title_brin', 'pages_per_range': None})
 
-    def test_deconstruction_with_pages_per_rank(self):
+    def test_deconstruction_with_pages_per_range(self):
         index = BrinIndex(fields=['title'], name='test_title_brin', pages_per_range=16)
         path, args, kwargs = index.deconstruct()
         self.assertEqual(path, 'django.contrib.postgres.indexes.BrinIndex')
@@ -35,10 +35,7 @@ class BrinIndexTests(PostgreSQLTestCase):
         self.assertEqual(kwargs, {'fields': ['title'], 'name': 'test_title_brin', 'pages_per_range': 16})
 
     def test_invalid_pages_per_range(self):
-        with self.assertRaises(ValueError):
-            BrinIndex(fields=['title'], name='test_title_brin', pages_per_range='Charles Babbage')
-
-        with self.assertRaises(ValueError):
+        with self.assertRaisesMessage(ValueError, 'pages_per_range must be None or a positive integer'):
             BrinIndex(fields=['title'], name='test_title_brin', pages_per_range=0)