From dca6cc8a013b6aaa8c0640fee21b6b65de0c9f62 Mon Sep 17 00:00:00 2001
From: Thomas Gelf <thomas@gelf.net>
Date: Fri, 20 May 2016 10:46:01 +0200
Subject: [PATCH] ExtensibleSet: respect strings when filtering

---
 library/Director/Web/Form/Element/ExtensibleSet.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/library/Director/Web/Form/Element/ExtensibleSet.php b/library/Director/Web/Form/Element/ExtensibleSet.php
index 12f6134b..1d252af9 100644
--- a/library/Director/Web/Form/Element/ExtensibleSet.php
+++ b/library/Director/Web/Form/Element/ExtensibleSet.php
@@ -32,9 +32,12 @@ class ExtensibleSet extends FormElement
 
     protected function _filterValue(&$value, &$key)
     {
-        if ($value !== null) {
+        if (is_array($value)) {
             $value = array_filter($value, 'strlen');
+        } elseif (is_string($value) && !strlen($value)) {
+            $value = null;
         }
+
         return parent::_filterValue($value, $key);
     }