From 0644795c54b7bbfe94f4163aaf53e90408feca69 Mon Sep 17 00:00:00 2001
From: Alexander O'Neill <aloneill@gmail.com>
Date: Wed, 24 Aug 2022 19:13:29 +0000
Subject: [PATCH] Skip empty image fields when constructing IIIF manifest.

---
 modules/islandora_iiif/src/Plugin/views/style/IIIFManifest.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/islandora_iiif/src/Plugin/views/style/IIIFManifest.php b/modules/islandora_iiif/src/Plugin/views/style/IIIFManifest.php
index 446358d0..ba971b47 100644
--- a/modules/islandora_iiif/src/Plugin/views/style/IIIFManifest.php
+++ b/modules/islandora_iiif/src/Plugin/views/style/IIIFManifest.php
@@ -189,7 +189,7 @@ class IIIFManifest extends StylePluginBase {
    */
   protected function getTileSourceFromRow(ResultRow $row, $iiif_address, $iiif_base_id) {
     $canvases = [];
-    foreach ($this->options['iiif_tile_field'] as $iiif_tile_field) {
+    foreach (array_filter(array_values($this->options['iiif_tile_field'])) as $iiif_tile_field) {
       $viewsField = $this->view->field[$iiif_tile_field];
       $entity = $viewsField->getEntity($row);