diff -r 97f6b3d655fc -r e6eb0c7c2e98 server/edition.py
--- a/server/edition.py	Tue Sep 08 17:15:03 2015 +0200
+++ b/server/edition.py	Tue Sep 08 18:04:57 2015 +0200
@@ -38,7 +38,7 @@
 class EditedEntity(dict):
     """encapsulate entities attributes being written by an RQL query"""
     def __init__(self, entity, **kwargs):
-        dict.__init__(self, **kwargs)
+        super(EditedEntity, self).__init__(**kwargs)
         self.entity = entity
         self.skip_security = set()
         self.querier_pending_relations = {}
@@ -50,10 +50,13 @@
 
     def __lt__(self, other):
         # we don't want comparison by value inherited from dict
-        return id(self) < id(other)
+        raise NotImplementedError
 
     def __eq__(self, other):
-        return id(self) == id(other)
+        return self is other
+
+    def __ne__(self, other):
+        return not (self == other)
 
     def __setitem__(self, attr, value):
         assert attr != 'eid'