diff --git a/ccserver/objectsdb.py b/ccserver/objectsdb.py
index da13a8fe9a64c1e5e7e8adf9ee01517caf7dd301..4d03306cb41f762c15f245fa486fa8be37fa6902 100644
--- a/ccserver/objectsdb.py
+++ b/ccserver/objectsdb.py
@@ -381,10 +381,9 @@ class ObjectsDB(object):
         '''
 
         ids = set()
-        for oid in self._objects:
-            parid = oid.partition('.')[0]
-            ids.add(parid)
-
+        for obj in self._objects.values():
+            if not '__parent' in obj:
+                ids.add(obj['id'])
         return ids
 
     def get(self, oid):