From fffbb5594405c0bbf8733a0c4395ac5d88c057e2 Mon Sep 17 00:00:00 2001
From: Victor Shnayder <victor@edx.org>
Date: Thu, 14 Feb 2013 09:09:11 -0500
Subject: [PATCH] Make hidden_module not cause 500 errors by adding a
 get_html()

---
 common/lib/xmodule/xmodule/hidden_module.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/common/lib/xmodule/xmodule/hidden_module.py b/common/lib/xmodule/xmodule/hidden_module.py
index d4f2a0fa33..e7639e63c8 100644
--- a/common/lib/xmodule/xmodule/hidden_module.py
+++ b/common/lib/xmodule/xmodule/hidden_module.py
@@ -3,7 +3,11 @@ from xmodule.raw_module import RawDescriptor
 
 
 class HiddenModule(XModule):
-    pass
+    def get_html(self):
+        if self.system.user_is_staff:
+            return "ERROR: This module is unknown--students will not see it at all"
+        else:
+            return ""
 
 
 class HiddenDescriptor(RawDescriptor):