--- a/web/facet.py	Wed Dec 09 12:20:05 2009 +0100
+++ b/web/facet.py	Wed Dec 09 12:23:31 2009 +0100
@@ -109,8 +109,8 @@
     if rel.optional in (opt, 'both'):
         # optional relation
         return ovar
-    if all(rschema.rproperty(s, o, 'cardinality')[cardidx] in '1+'
-           for s,o in rschema.iter_rdefs()):
+    if all(rdef.cardinality[cardidx] in '1+'
+           for rdef in rschema.rdefs.values()):
         # mandatory relation without any restriction on the other variable
         for orel in ovar.stinfo['relations']:
             if rel is orel: