From 9f5db3e35c8a51bed901fd0ac6dc249bbf79002f Mon Sep 17 00:00:00 2001
From: Romain Ruaud <romain.ruaud@smile.fr>
Date: Tue, 22 Oct 2024 11:56:48 +0200
Subject: [PATCH] Adding fallback when default sort by is unset

---
 .../Model/Preview.php                                    | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/module-elasticsuite-virtual-category/Model/Preview.php b/src/module-elasticsuite-virtual-category/Model/Preview.php
index ffef321ce..c56002f5f 100644
--- a/src/module-elasticsuite-virtual-category/Model/Preview.php
+++ b/src/module-elasticsuite-virtual-category/Model/Preview.php
@@ -68,7 +68,7 @@ class Preview extends AbstractPreview
     /**
      * @var string
      */
-    private $sortBy;
+    private $sortBy = null;
 
     /**
      * Constructor.
@@ -222,7 +222,12 @@ private function getSortBy() : string
             $useConfig = $this->request->getParam('use_config', []);
             $useConfig = array_key_exists('default_sort_by', $useConfig) && $useConfig['default_sort_by'] == 'true';
             $defaultSortBy = $this->categoryConfig->getProductListDefaultSortBy();
-            $this->sortBy = $useConfig ? $defaultSortBy : $this->request->getParam('default_sort_by');
+            $sortBy        = $this->request->getParam('default_sort_by', $defaultSortBy);
+            if (empty($sortBy) || ((string) $sortBy === '')) {
+                $sortBy = $defaultSortBy;
+            }
+
+            $this->sortBy  = $useConfig ? $defaultSortBy : $sortBy;
         }
 
         return $this->sortBy;