From 87667cfe17d7d31660241793cc009fd30994c415 Mon Sep 17 00:00:00 2001
From: Robin Ward <robin.ward@gmail.com>
Date: Tue, 2 Dec 2014 11:46:21 -0500
Subject: [PATCH] FIX: Editing a category definition topic was clearing its
 permissions

---
 app/assets/javascripts/discourse/models/site.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/app/assets/javascripts/discourse/models/site.js b/app/assets/javascripts/discourse/models/site.js
index c66481c9910..c8e09a9dce1 100644
--- a/app/assets/javascripts/discourse/models/site.js
+++ b/app/assets/javascripts/discourse/models/site.js
@@ -66,7 +66,12 @@ Discourse.Site = Discourse.Model.extend({
 
   updateCategory: function(newCategory) {
     var existingCategory = this.get('categories').findProperty('id', Em.get(newCategory, 'id'));
-    if (existingCategory) existingCategory.setProperties(newCategory);
+    if (existingCategory) {
+      // Don't update null permissions
+      if (newCategory.permission === null) { delete newCategory.permission; }
+
+      existingCategory.setProperties(newCategory);
+    }
   }
 });