Inherit duration from parent set

administrator/components/com_testquestions/src/Model/SetModel.php

@@ -133,6 +133,10 @@ class SetModel extends AdminModel
 
         if ($parentId > 0) {
             $data['set_type'] = 'variant';
+            $parent = $this->getItem($parentId);
+            if ($parent) {
+                $data['duration'] = (int) $parent->duration;
+            }
         } elseif (!in_array(($data['set_type'] ?? 'ordinary'), ['ordinary', 'multi'], true)) {
             $data['set_type'] = 'ordinary';
         }

administrator/components/com_testquestions/src/View/Set/HtmlView.php

@@ -4,6 +4,7 @@ namespace Komponent\Component\Testquestions\Administrator\View\Set;
 
 defined('_JEXEC') or die;
 
+use Joomla\CMS\Factory;
 use Joomla\CMS\Language\Text;
 use Joomla\CMS\MVC\View\HtmlView as BaseHtmlView;
 use Joomla\CMS\Toolbar\ToolbarHelper;
@@ -15,6 +16,8 @@ class HtmlView extends BaseHtmlView
     protected $questions;
     protected $categories;
     protected $variants;
+    protected $isVariant;
+    protected $parentTitle = '';
 
     public function display($tpl = null)
     {
@@ -23,6 +26,14 @@ class HtmlView extends BaseHtmlView
         $this->questions = $this->get('Questions');
         $this->categories = $this->get('Categories');
         $this->variants = $this->item && (int) $this->item->id > 0 ? $this->get('Variants') : [];
+        $parentId = Factory::getApplication()->getInput()->getInt('parent_id');
+        $this->isVariant = (int) ($this->item->parent_id ?? 0) > 0 || $parentId > 0;
+        $this->parentTitle = (string) ($this->item->parent_title ?? '');
+
+        if ($this->isVariant && $this->parentTitle === '' && $parentId > 0) {
+            $parent = $this->getModel()->getItem($parentId);
+            $this->parentTitle = (string) ($parent->title ?? '');
+        }
 
         if (count($errors = $this->get('Errors'))) {
             throw new \RuntimeException(implode("\n", $errors));