From e1e46f0dff8a485db093572630e74c4a4ecc6968 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9gis=20Hanol?= <regis@hanol.fr>
Date: Thu, 21 Mar 2019 19:40:10 +0100
Subject: [PATCH] FIX: topic with no tags

---
 app/assets/javascripts/discourse/models/topic.js.es6 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/assets/javascripts/discourse/models/topic.js.es6 b/app/assets/javascripts/discourse/models/topic.js.es6
index 00ec3934e65..e769d7e87f1 100644
--- a/app/assets/javascripts/discourse/models/topic.js.es6
+++ b/app/assets/javascripts/discourse/models/topic.js.es6
@@ -227,7 +227,7 @@ const Topic = RestModel.extend({
 
   @computed("tags")
   tagClasses(tags) {
-    return tags.map(t => `tag-${t}`).join(" ");
+    return tags && tags.map(t => `tag-${t}`).join(" ");
   },
 
   @computed("url")