Slightly more robust group-membership conversion

diff --git a/classes/Group_member.php b/classes/Group_member.php
index 8873942318b04329512c6b5c8c184ab9365e5e59..d51aa9ff9c1cf5d89a21af01e2586945b1475e94 100644 (file)
--- a/classes/Group_member.php
+++ b/classes/Group_member.php
@@ -161,8 +161,17 @@ class Group_member extends Managed_DataObject
     function asActivity()
     {
         $member = $this->getMember();
+
+        if (!$member) {
+            throw new Exception("No such member: " . $this->profile_id);
+        }
+
         $group  = $this->getGroup();
 
+        if (!$group) {
+            throw new Exception("No such group: " . $this->group_id);
+        }
+
         $act = new Activity();
 
         $act->id = $this->getURI();