From c787c50266da2f5af2640032a08843b8b2fababd Mon Sep 17 00:00:00 2001
From: Tobias Feijten <tobias@kick-in.nl>
Date: Mon, 22 Jul 2019 11:52:58 +0200
Subject: [PATCH] Prevent issues with Doctrine Inflector due to null string

---
 .../CommonAdmin/ExcelAction/ExcelBuilderAction.php.twig      | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Resources/templates/CommonAdmin/ExcelAction/ExcelBuilderAction.php.twig b/Resources/templates/CommonAdmin/ExcelAction/ExcelBuilderAction.php.twig
index 49784e9d..9b2695f4 100644
--- a/Resources/templates/CommonAdmin/ExcelAction/ExcelBuilderAction.php.twig
+++ b/Resources/templates/CommonAdmin/ExcelAction/ExcelBuilderAction.php.twig
@@ -32,6 +32,7 @@ class ExcelController extends \{{ namespace_prefix }}\{{ bundle_name }}\Controll
         $this->request = $request;
 
         if ($key === null) {
+          $key = '';
           // Standard credential check
           {{ block('security_action') }}
         } else {
@@ -55,7 +56,7 @@ class ExcelController extends \{{ namespace_prefix }}\{{ bundle_name }}\Controll
           $suffix = Inflector::classify($key);
           if (!method_exists($this,"createSpreadsheetHeader$suffix")) {
               // back to defaults
-              $key = null;
+              $key = '';
               $suffix = '';
           }
 
@@ -100,7 +101,7 @@ class ExcelController extends \{{ namespace_prefix }}\{{ bundle_name }}\Controll
           $suffix = Inflector::classify($key);
           if (!method_exists($this,"createExcelHeader$suffix")) {
               // back to defaults
-              $key = null;
+              $key = '';
               $suffix = '';
           }