From da23da1e8ec6f72a00c5a487d41710ee51e8a4c5 Mon Sep 17 00:00:00 2001
From: Henrik Levkowetz <henrik@levkowetz.com>
Date: Sat, 16 Sep 2017 09:24:29 +0000
Subject: [PATCH] Tweaked Document.relations_that_doc() to accept unicode
 relationship strings, in order to let it be called from modules importing 
 __future__.unicode_literals.  - Legacy-Id: 14124

---
 ietf/doc/models.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ietf/doc/models.py b/ietf/doc/models.py
index 8663bed00..1f533c5cb 100644
--- a/ietf/doc/models.py
+++ b/ietf/doc/models.py
@@ -4,6 +4,7 @@ import datetime
 import logging
 import os
 import rfc2html
+import six
 
 from django.db import models
 from django.core import checks
@@ -383,7 +384,7 @@ class DocumentInfo(models.Model):
 
     def relations_that_doc(self, relationship):
         """Return the related-document objects that describe a given relationship from self to other documents."""
-        if isinstance(relationship, str):
+        if isinstance(relationship, six.string_types):
             relationship = [ relationship ]
         if isinstance(relationship, tuple):
             relationship = list(relationship)