# HG changeset patch
# User Ludovic Chabant <ludovic@chabant.com>
# Date 1423672273 28800
# Node ID 137bcd498ef9d88f6a49fd92d39b543ce22ee15f
# Parent  016d42c23ba9b81031de26eeac9c64069b65fafc
serve: Fix a bug where empty route metadata is not the same as invalid route.

Some routes can capture no metadata at all, like for example when
`foo/%path:slug%` is capturing URL `foo`. The route is still valid, so it
returns an empty dictionary. It's not the same as returning `None`, which means
"no match".

diff -r 016d42c23ba9 -r 137bcd498ef9 piecrust/serving.py
--- a/piecrust/serving.py	Wed Feb 11 08:29:09 2015 -0800
+++ b/piecrust/serving.py	Wed Feb 11 08:31:13 2015 -0800
@@ -414,7 +414,7 @@
     res = []
     for route in routes:
         metadata = route.matchUri(uri)
-        if metadata:
+        if metadata is not None:
             res.append((route, metadata))
     return res