# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@logilab.fr>
# Date 1332351192 -3600
# Node ID baa3ea5eac2b7d9ea06bb2e166cf840104ac61cf
# Parent  e7c008ebef744ec17f958481bd80ae4bde5241f9
querier: Improve error message when ERQLExpression fails on some entity (closes #2267081)

When an RQL variable is indeed "constant" (we know it's eid) ERQL expression are
not inserted but checked prior query execution. If the session have no read
access to the entity an `Unauthorized` exception is raised.

This changeset add a meaningfull message to this exception::

     No read acces on "X" with eid 42.

diff -r e7c008ebef74 -r baa3ea5eac2b server/querier.py
--- a/server/querier.py	Mon Mar 26 12:13:40 2012 +0200
+++ b/server/querier.py	Wed Mar 21 18:33:12 2012 +0100
@@ -417,7 +417,7 @@
                         if rqlexpr.check(session, eid):
                             break
                     else:
-                        raise Unauthorized()
+                        raise Unauthorized('No read acces on %r with eid %i.' % (var, eid))
                 restricted_vars.update(localcheck)
                 localchecks.setdefault(tuple(localcheck.iteritems()), []).append(solution)
         # raise Unautorized exception if the user can't access to any solution