From 59ac25c93b228cd4ef34d4f36fbfbab3d9f6b4ad Mon Sep 17 00:00:00 2001
From: Andrey Doroschenko <dorosch.github.io@yandex.ru>
Date: Thu, 27 Feb 2020 08:26:52 +0300
Subject: [PATCH] [3.0.x] Fixed #31313 -- Fixed is_upperclass() example in
 enumeration types docs.

Backport of f1016814d84b1423cfe0df85644c9870a6bc6b41 from master
---
 docs/ref/models/fields.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/docs/ref/models/fields.txt b/docs/ref/models/fields.txt
index dfd9f9b665..f997921148 100644
--- a/docs/ref/models/fields.txt
+++ b/docs/ref/models/fields.txt
@@ -204,7 +204,10 @@ choices in a concise way::
         )
 
         def is_upperclass(self):
-            return self.year_in_school in {YearInSchool.JUNIOR, YearInSchool.SENIOR}
+            return self.year_in_school in {
+                self.YearInSchool.JUNIOR,
+                self.YearInSchool.SENIOR,
+            }
 
 These work similar to :mod:`enum` from Python's standard library, but with some
 modifications: