Issue #3060626 by mohit_aghera, ranjith_kumar_k_u, Suresh Prabhu Parkala,...

Issue #3060626 by mohit_aghera, ranjith_kumar_k_u, Suresh Prabhu Parkala, aalin, Prem Suthar, cindytwilliams, larowlan, smustgrave, Kristen Pol: OptionsWidgetBase doesn't respect #required_error

core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/OptionsWidgetBase.php

@@ -90,7 +90,12 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
    */
   public static function validateElement(array $element, FormStateInterface $form_state) {
     if ($element['#required'] && $element['#value'] == '_none') {
-      $form_state->setError($element, new TranslatableMarkup('@name field is required.', ['@name' => $element['#title']]));
+      if (isset($element['#required_error'])) {
+        $form_state->setError($element, $element['#required_error']);
+      }
+      else {
+        $form_state->setError($element, new TranslatableMarkup('@name field is required.', ['@name' => $element['#title']]));
+      }
     }
 
     // Massage submitted form values.

core/modules/options/tests/options_test/options_test.module

@@ -7,6 +7,7 @@
 
 use Drupal\Core\Entity\FieldableEntityInterface;
 use Drupal\Core\Field\FieldStorageDefinitionInterface;
+use Drupal\Core\Form\FormStateInterface;
 
 /**
  * Implements callback_allowed_values_function().
@@ -55,6 +56,15 @@ function options_test_dynamic_values_callback(FieldStorageDefinitionInterface $d
   return array_combine($values, $values);
 }
 
+/**
+ * Implements hook_form_FORM_ID_alter().
+ */
+function options_test_form_entity_test_entity_test_form_alter(&$form, FormStateInterface $form_state, $form_id) {
+  if (\Drupal::state()->get('options_test.form_alter_enable', FALSE)) {
+    $form['card_1']['widget']['#required_error'] = t('This is custom message for required field.');
+  }
+}
+
 /**
  * Implements hook_options_list_alter().
  */

core/modules/options/tests/src/Functional/OptionsWidgetsTest.php

@@ -374,6 +374,44 @@ public function testSelectListSingle() {
     $this->assertFieldValues($entity_init, 'card_1', []);
   }
 
+  /**
+   * Tests the '#required_error' attribute for the select list.
+   */
+  public function testSelectListRequiredErrorAttribute() {
+    // Enable form alter hook.
+    \Drupal::state()->set('options_test.form_alter_enable', TRUE);
+    // Create an instance of the 'single value' field.
+    $field = FieldConfig::create([
+      'field_storage' => $this->card1,
+      'bundle' => 'entity_test',
+      'required' => TRUE,
+    ]);
+    $field->save();
+    \Drupal::service('entity_display.repository')
+      ->getFormDisplay('entity_test', 'entity_test')
+      ->setComponent($this->card1->getName(), [
+        'type' => 'options_select',
+      ])
+      ->save();
+
+    // Create an entity.
+    $entity = EntityTest::create([
+      'user_id' => 1,
+      'name' => $this->randomMachineName(),
+    ]);
+    $entity->save();
+
+    $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
+    // A required field without any value has a "none" option.
+    $option = $this->assertSession()->optionExists('edit-card-1', '_none');
+    $this->assertSame('- Select a value -', $option->getText());
+
+    // Submit form: select invalid 'none' option.
+    $edit = ['card_1' => '_none'];
+    $this->submitForm($edit, 'Save');
+    $this->assertSession()->responseContains(t('This is custom message for required field.'));
+  }
+
   /**
    * Tests the 'options_select' widget (multiple select).
    */