From aad2efc4efe9c08a49fe305e1e7942718d11236d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Eray=20=C3=96zkural?= <eray@pardus.org.tr>
Date: Tue, 13 Dec 2005 08:42:47 +0000
Subject: [PATCH] * fix: return empty result if no valid terms given

---
 pisi/search/invertedindex.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pisi/search/invertedindex.py b/pisi/search/invertedindex.py
index ea42c952..4f8d4657 100644
--- a/pisi/search/invertedindex.py
+++ b/pisi/search/invertedindex.py
@@ -39,7 +39,10 @@ class InvertedIndex(object):
     def query(self, terms, txn = None):
         def proc(txn):
             docs = [ self.get_term(x, txn) for x in terms ]
-            return reduce(lambda x,y: x.intersection(y), docs)
+            if docs:
+                return reduce(lambda x,y: x.intersection(y), docs)
+            else:
+                return set()
         return self.d.txn_proc(proc, txn)
 
     def list_terms(self, txn= None):