Issue #3469457: Cannot output domain source in content view - buildUrl() on null

Closes #3469457

domain_source/src/Plugin/views/field/DomainSource.php

@@ -23,10 +23,12 @@ class DomainSource extends EntityField {
       foreach ($items as &$item) {
         $object = $item['raw'];
         $entity = $object->getEntity();
-        $url = $entity->toUrl()->toString();
-        $domain = $item['rendered']['#options']['entity'];
-        $item['rendered']['#type'] = 'markup';
-        $item['rendered']['#markup'] = '<a href="' . $domain->buildUrl($url) . '">' . $domain->label() . '</a>';
+        $domain = $item['rendered']['#entity'];
+        $item['rendered'] = [
+          '#type' => 'link',
+          '#title' => $domain->label(),
+          '#url' => $entity->toUrl(),
+        ];
       }
       uasort($items, [$this, 'sort']);
     }
@@ -38,8 +40,8 @@ class DomainSource extends EntityField {
    * Sort the domain list, if possible.
    */
   private function sort($a, $b) {
-    $domainA = $a['rendered']['#options']['entity'] ?? 0;
-    $domainB = $b['rendered']['#options']['entity'] ?? 0;
+    $domainA = $a['rendered']['#entity'] ?? 0;
+    $domainB = $b['rendered']['#entity'] ?? 0;
     if ($domainA !== 0) {
       return ($domainA->getWeight() > $domainB->getWeight()) ? 1 : 0;
     }