--- a/server/schemaserial.py	Wed Jan 29 15:57:48 2014 +0100
+++ b/server/schemaserial.py	Tue Jan 28 18:40:19 2014 +0100
@@ -74,9 +74,9 @@
                 break
     return res
 
-def cstrtype_mapping(cursor):
+def cstrtype_mapping(cnx):
     """cached constraint types mapping"""
-    map = dict(cursor.execute('Any T, X WHERE X is CWConstraintType, X name T'))
+    map = dict(cnx.execute('Any T, X WHERE X is CWConstraintType, X name T'))
     return map
 
 # schema / perms deserialization ##############################################