From c654ead8988d05349e34b63e40dc1e42f9f2c2b9 Mon Sep 17 00:00:00 2001
From: Mads Jensen <mje@inducks.org>
Date: Tue, 14 Mar 2017 13:29:22 +0100
Subject: [PATCH] [1.11.x] Used constant instead of hard-coded value for max
 index name length

Refs #26709

Backport of e7033e00f8e1ba2ffe538e56c5088a7e94c2e45d from master
---
 django/db/models/indexes.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/django/db/models/indexes.py b/django/db/models/indexes.py
index 59221312920..b8280130814 100644
--- a/django/db/models/indexes.py
+++ b/django/db/models/indexes.py
@@ -108,7 +108,7 @@ class Index(object):
             column_names[0][:7],
             '%s_%s' % (self._hash_generator(*hash_data), self.suffix),
         )
-        assert len(self.name) <= 30, (
+        assert len(self.name) <= MAX_NAME_LENGTH, (
             'Index too long for multiple database support. Is self.suffix '
             'longer than 3 characters?'
         )