Issue #3382310: Multiple contextual filters / arguments are not supported when...

Issue #3382310: Multiple contextual filters / arguments are not supported when a value is not provided for them

Closes #3382310

src/Plugin/Field/FieldFormatter/ViewsReferenceFieldFormatter.php

@@ -101,6 +101,30 @@ class ViewsReferenceFieldFormatter extends FormatterBase {
       }
 
       $view->setDisplay($display_id);
+
+      $unserialized_data = unserialize($item->getValue()['data'], ['allowed_classes' => FALSE]);
+      $arguments = !empty($unserialized_data['argument']) ? explode('/', $unserialized_data['argument']) : [];
+      if ($arguments) {
+        // Get the view display.
+        $display = $view->storage->getDisplay($display_id);
+        // Contextual arguments are set to default if they are not overridden.
+        if (empty($display['display_options']['arguments'])) {
+          $default_display = $view->storage->getDisplay('default');
+          // If no arguments found try to get the ones from default display.
+          $display['display_options']['arguments'] = $default_display['display_options']['arguments'];
+        }
+        $display_arguments = array_values($display['display_options']['arguments']);
+
+        // If no value has been provided for an argument, use the default
+        // value for displaying all results.
+        foreach ($arguments as $num => $argument) {
+          if ($argument === '' && !empty($display_arguments[$num]['exception']['value'])) {
+            $arguments[$num] = $display_arguments[$num]['exception']['value'];
+          }
+        }
+        $unserialized_data['argument'] = implode('/', $arguments);
+      }
+
       $enabled_settings = array_filter($this->getFieldSetting('enabled_settings') ?? []);
 
       // Add properties to the view so our hook_views_pre_build() implementation
@@ -108,7 +132,7 @@ class ViewsReferenceFieldFormatter extends FormatterBase {
       // behaviour in views. The hook_views_pre_build() needs to know if the
       // view was part of a viewsreference field or not.
       $view->element['#viewsreference'] = [
-        'data' => !empty($item->getValue()['data']) ? unserialize($item->getValue()['data'], ['allowed_classes' => FALSE]) : [],
+        'data' => $unserialized_data,
         'enabled_settings' => $enabled_settings,
         'parent_entity_type' => $parent_entity_type,
         'parent_entity_id' => $parent_entity_id,