Fixed an exception on admin pages, if the element does not contain parts.

src/Controller/AdminPages/BaseAdminController.php

@@ -254,6 +254,7 @@ abstract class BaseAdminController extends AbstractController
             'pdf_data' => $pdf_data ?? null,
             'timeTravel' => $timeTravel_timestamp,
             'repo' => $repo,
+            'partsContainingElement' => $repo instanceof PartsContainingRepositoryInterface,
         ]);
     }
 

templates/AdminPages/_info.html.twig

@@ -38,7 +38,7 @@
     <label class="col-form-label col-md-3">{% trans %}entity.info.parts_count{% endtrans %}</label>
     <div class="col-md-9">
         <p class="form-control-static">
-            {% if entity.id and repo.partsCount is defined %}
+            {% if entity.id and partsContainingElement %}
                 {{ repo.partsCount(entity) }}
             {% else %}
                 -