# HG changeset patch
# User Sylvain Thénault <sylvain.thenault@logilab.fr>
# Date 1264508860 -3600
# Node ID 5c18d82042fb737107343eb22827b5952ce35caf
# Parent  817851a77e27d0ee01da5f50e577c06ba873a60a
cache result of the COUNT query used to see if a non unique attribute may be used as rest path on the entity instance to avoid recomputing it later

diff -r 817851a77e27 -r 5c18d82042fb entity.py
--- a/entity.py	Tue Jan 26 13:26:41 2010 +0100
+++ b/entity.py	Tue Jan 26 13:27:40 2010 +0100
@@ -316,9 +316,12 @@
                 path += '/eid'
             elif needcheck:
                 # make sure url is not ambiguous
-                rql = 'Any COUNT(X) WHERE X is %s, X %s %%(value)s' % (
-                    etype, mainattr)
-                nbresults = self._cw.execute(rql, {'value' : value})[0][0]
+                try:
+                    nbresults = self.__unique
+                except AttributeError:
+                    rql = 'Any COUNT(X) WHERE X is %s, X %s %%(value)s' % (
+                        etype, mainattr)
+                    nbresults = self.__unique = self._cw.execute(rql, {'value' : value})[0][0]
                 if nbresults != 1: # ambiguity?
                     mainattr = 'eid'
                     path += '/eid'