From 61999058e23fc5f4fe34e4308cb46b5611bc53cd Mon Sep 17 00:00:00 2001
From: helmutm <helmutm@fd906abe-77d9-0310-91a1-e0d9ade77398>
Date: Tue, 19 May 2009 16:00:27 +0000
Subject: [PATCH] bug fix for empty type query result

git-svn-id: svn://svn.cy55.de/Zope3/src/loops/trunk@3390 fd906abe-77d9-0310-91a1-e0d9ade77398
---
 expert/concept.py | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/expert/concept.py b/expert/concept.py
index 5b81035..dc238b2 100644
--- a/expert/concept.py
+++ b/expert/concept.py
@@ -148,10 +148,11 @@ class FullQuery(BaseQuery):
                 if not r1 and not r2:
                     r1 = cat.apply(criteria)    # search only for type
                 x, uids = weightedUnion(r1, r2) #result = r1.union(r2)
-                for r, score in uids.items():
-                    obj = intids.getObject(r)
-                    result.add(obj)
-                    scores[obj] = score
+                if uids:
+                    for r, score in uids.items():
+                        obj = intids.getObject(r)
+                        result.add(obj)
+                        scores[obj] = score
         if rc is not None:
             if result:
                 result = result.intersection(rc)