From 19d649701d897159342bead622b1d7c956743bb4 Mon Sep 17 00:00:00 2001
From: Robbie Averill <robbie@silverstripe.com>
Date: Wed, 12 Dec 2018 16:14:32 +0000
Subject: [PATCH] FIX Switch instanceof logic to check for a non-FormField

---
 src/Model/ResourceFilter.php | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/Model/ResourceFilter.php b/src/Model/ResourceFilter.php
index b14829f8..1dfd99a1 100644
--- a/src/Model/ResourceFilter.php
+++ b/src/Model/ResourceFilter.php
@@ -77,11 +77,16 @@ public function getCMSFields()
         return parent::getCMSFields();
     }
 
+    /**
+     * {@inheritdoc}
+     *
+     * @throws InvalidArgumentException If the provided Type is not an instance of FormField
+     */
     public function forTemplate()
     {
         $options = json_decode($this->TypeOptions, true);
         $field = Injector::inst()->createWithArgs($this->Type, $options);
-        if ($field instanceof FormField) {
+        if (!$field instanceof FormField) {
             throw new InvalidArgumentException("$this->Type is not a FormField");
         }
         return $field;