From a186a60c436b3ee3653ee8b55dbd2c5dd877f34f Mon Sep 17 00:00:00 2001
From: Samuel Georges <sam@daftspunk.com>
Date: Wed, 9 Dec 2015 08:19:53 +1100
Subject: [PATCH] Fixes the datepicker saving an empty value when disabled Refs
 https://github.com/responsiv/campaign-plugin/issues/4

---
 modules/backend/classes/FormWidgetBase.php | 3 ++-
 modules/backend/formwidgets/DatePicker.php | 5 +++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/modules/backend/classes/FormWidgetBase.php b/modules/backend/classes/FormWidgetBase.php
index 97182613b..168deedb8 100644
--- a/modules/backend/classes/FormWidgetBase.php
+++ b/modules/backend/classes/FormWidgetBase.php
@@ -97,7 +97,8 @@ abstract class FormWidgetBase extends WidgetBase
     }
 
     /**
-     * Process the postback value for this widget.
+     * Process the postback value for this widget. If the value is omitted from
+     * postback data, it will be NULL, otherwise it will be an empty string.
      * @param $value The existing value for this widget.
      * @return string The new value for this widget.
      */
diff --git a/modules/backend/formwidgets/DatePicker.php b/modules/backend/formwidgets/DatePicker.php
index 0196f3072..49b40cdc7 100644
--- a/modules/backend/formwidgets/DatePicker.php
+++ b/modules/backend/formwidgets/DatePicker.php
@@ -1,6 +1,7 @@
 <?php namespace Backend\FormWidgets;
 
 use Carbon\Carbon;
+use Backend\Classes\FormField;
 use Backend\Classes\FormWidgetBase;
 
 /**
@@ -139,6 +140,10 @@ class DatePicker extends FormWidgetBase
      */
     public function getSaveValue($value)
     {
+        if ($this->formField->disabled) {
+            return FormField::NO_SAVE_DATA;
+        }
+
         if (!strlen($value)) {
             return null;
         }