From 538cc6994947542c7ca0eeddcdb057eb558505d3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Fri, 6 Sep 2013 21:14:18 +0200
Subject: [PATCH] Fix value from Selection with relation when empty

---
 src/view.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/view.js b/src/view.js
index 4a1b344d11..003cb26155 100644
--- a/src/view.js
+++ b/src/view.js
@@ -1387,6 +1387,9 @@
         value_get: function() {
             var val = this.el.val();
             if ('relation' in this.attributes) {
+                if (val === '') {
+                    return null;
+                }
                 return parseInt(val, 10);
             }
             return val;