From 2c99924f7d2a98c61920de837272d9cff1a33876 Mon Sep 17 00:00:00 2001
From: Robin Appelman <icewind@owncloud.com>
Date: Thu, 17 May 2012 00:47:43 +0200
Subject: [PATCH] make sure the group exists in the backend before adding a
 user to it

---
 lib/group.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/group.php b/lib/group.php
index 9b2959d1f7..1e0216a932 100644
--- a/lib/group.php
+++ b/lib/group.php
@@ -177,7 +177,11 @@ class OC_Group {
 				if(!$backend->implementsActions(OC_GROUP_BACKEND_ADD_TO_GROUP))
 					continue;
 
-				$succes|=$backend->addToGroup($uid, $gid);
+				if($backend->groupExists($gid)){
+					$succes|=$backend->addToGroup($uid, $gid);
+				}
+			}
+			if($succes){
 				OC_Hook::emit( "OC_User", "post_addToGroup", array( "uid" => $uid, "gid" => $gid ));
 			}
 			return $succes;