From 1dc0aad82884487ee8b71eb5f88026bd7dabe6cc Mon Sep 17 00:00:00 2001
From: Thomas Gelf <thomas@gelf.net>
Date: Tue, 13 Dec 2016 11:39:15 +0100
Subject: [PATCH] FormDataFilter: correct 'in' operator handling

fixes #13543
---
 application/views/helpers/FormDataFilter.php | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/application/views/helpers/FormDataFilter.php b/application/views/helpers/FormDataFilter.php
index 1e572166..0087bd13 100644
--- a/application/views/helpers/FormDataFilter.php
+++ b/application/views/helpers/FormDataFilter.php
@@ -291,9 +291,10 @@ class Zend_View_Helper_FormDataFilter extends Zend_View_Helper_FormElement
         if ($filter === null) {
             $sign = null;
         } else {
-            if ($filter->getExpression() === true) {
+            $expression = json_decode($filter->getExpression());
+            if ($expression === true) {
                 $sign = 'true';
-            } elseif (is_array($filter->getExpression())) {
+            } elseif (is_array($expression)) {
                 $sign = 'in';
             } else {
                 $sign = $filter->getSign();