From 5b3525068bf13567fc172e390f7087817d2ff8e7 Mon Sep 17 00:00:00 2001
From: Ingo Pfennigstorf <i.pfennigstorf@gmail.com>
Date: Mon, 5 Jul 2021 12:24:19 +0200
Subject: [PATCH] Fix type error on metadata key field

---
 Service/PresentationService.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Service/PresentationService.php b/Service/PresentationService.php
index e97db6f..71701e1 100644
--- a/Service/PresentationService.php
+++ b/Service/PresentationService.php
@@ -476,7 +476,7 @@ private function getMetadata(\Subugoe\IIIFModel\Model\Document $document): array
             if (!empty($value)) {
                 $data = new Metadata();
                 $data
-                    ->setLabel($key)
+                    ->setLabel((string) $key)
                     ->setValue($value);
                 $metadata[] = $data;
             }