[BUGFIX] Fix for $documentArray being null after function `getDoc…

…umentById` is called (#1345)

Co-authored-by: Sebastian Meyer <[email protected]>

Classes/Controller/AbstractController.php

@@ -525,11 +525,14 @@ protected function buildSimplePagination(PaginationInterface $pagination, Pagina
      */
     private function getDocumentByUid(int $documentId)
     {
+        // TODO: implement multiView as it is in getDocumentByUrl
         $doc = null;
         $this->document = $this->documentRepository->findOneByIdAndSettings($documentId);
 
         if ($this->document) {
             $doc = AbstractDocument::getInstance($this->document->getLocation(), $this->settings, true);
+            // fix for count(): Argument #1 ($value) must be of type Countable|array, null given
+            $this->documentArray[] = $doc;
         } else {
             $this->logger->error('Invalid UID "' . $documentId . '" or PID "' . $this->settings['storagePid'] . '" for document loading');
         }