From 0ce8a29b52596f855e2ff13a3c65ec210cc2b09b Mon Sep 17 00:00:00 2001
From: Thomas Gelf <thomas@gelf.net>
Date: Tue, 24 May 2016 19:59:02 +0200
Subject: [PATCH] Boolean: form sends '' for null value

---
 library/Director/Web/Form/Element/Boolean.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/library/Director/Web/Form/Element/Boolean.php b/library/Director/Web/Form/Element/Boolean.php
index 84a9947d..384bc982 100644
--- a/library/Director/Web/Form/Element/Boolean.php
+++ b/library/Director/Web/Form/Element/Boolean.php
@@ -33,6 +33,7 @@ class Boolean extends ZfSelect
         return $value === 'y'
             || $value === 'n'
             || $value === null
+            || $value === ''
             || $value === true
             || $value === false;
     }
@@ -43,6 +44,8 @@ class Boolean extends ZfSelect
             $value = 'y';
         } elseif ($value === false) {
             $value = 'n';
+        } elseif ($value === '') {
+            $value = null;
         }
 
         return parent::setValue($value);