From 89215ec682ad114abc04e5a58870e8a558e0884d Mon Sep 17 00:00:00 2001
From: cmfcmf <cmfcmf.flach@gmail.com>
Date: Wed, 24 Dec 2014 14:21:15 +0100
Subject: [PATCH] Corrected behaviour of CategorySelector if no category is
 selected, refs zikula-modules/Pages#35.

---
 src/lib/Zikula/Form/Plugin/CategorySelector.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/lib/Zikula/Form/Plugin/CategorySelector.php b/src/lib/Zikula/Form/Plugin/CategorySelector.php
index 770232aa92..458a9e03b8 100644
--- a/src/lib/Zikula/Form/Plugin/CategorySelector.php
+++ b/src/lib/Zikula/Form/Plugin/CategorySelector.php
@@ -272,7 +272,10 @@ public function saveValue(Zikula_Form_View $view, &$data)
             //$em->flush();
 
             foreach ($selectedValues as $selectedValue) {
-
+                if ($selectedValue === null) {
+                    // If no category has been selected.
+                    continue;
+                }
                 $category = $em->find('Zikula_Doctrine2_Entity_Category', $selectedValue);
                 $class = $em->getClassMetadata(get_class($entity))->getAssociationTargetClass($this->dataField);
                 $collection->add(new $class($this->registryId, $category, $entity));