Issue #3069578 by danflanagan8, YurkinPark, ayushmishra206, andersen_ti, waspper, tim.plunkett, Anybody, Regnoy, larowlan: Layout builder doesn't show new "extra fields"

core/config/schema/core.entity.schema.yml

@@ -381,6 +381,12 @@ block.settings.field_block:*:*:*:
     formatter:
       type: field_formatter
 
+block.settings.extra_field_block:*:*:*:
+  type: block_settings
+  mapping:
+    formatter:
+      type: field_formatter
+
 # Schema for entity actions.
 action.configuration.entity:*:*:
   type: action_configuration_default

core/modules/layout_builder/src/Entity/LayoutBuilderEntityViewDisplay.php

@@ -535,7 +535,7 @@ class LayoutBuilderEntityViewDisplay extends BaseEntityViewDisplay implements La
     foreach ($this->getSections() as $section) {
       foreach ($section->getComponents() as $component) {
         $plugin = $component->getPlugin();
-        if ($plugin instanceof DerivativeInspectionInterface && $plugin->getBaseId() === 'field_block') {
+        if ($plugin instanceof DerivativeInspectionInterface && in_array($plugin->getBaseId(), ['field_block', 'extra_field_block'], TRUE)) {
           // FieldBlock derivative IDs are in the format
           // [entity_type]:[bundle]:[field].
           list(, , $field_block_field_name) = explode(PluginBase::DERIVATIVE_SEPARATOR, $plugin->getDerivativeId());

core/modules/layout_builder/src/Plugin/Block/ExtraFieldBlock.php

@@ -85,6 +85,10 @@ class ExtraFieldBlock extends BlockBase implements ContextAwarePluginInterface,
   public function defaultConfiguration() {
     return [
       'label_display' => FALSE,
+      'formatter' => [
+        'settings' => [],
+        'third_party_settings' => [],
+      ],
     ];
   }
 

core/modules/layout_builder/tests/modules/layout_builder_test/layout_builder_test.module

@@ -47,6 +47,12 @@ function layout_builder_test_entity_extra_field_info() {
     'description' => t('Extra description'),
     'weight' => 0,
   ];
+  $extra['node']['bundle_with_section_field']['display']['layout_builder_test_2'] = [
+    'label' => t('Extra Field 2'),
+    'description' => t('Extra Field 2 description'),
+    'weight' => 0,
+    'visible' => FALSE,
+  ];
   return $extra;
 }
 
@@ -59,6 +65,11 @@ function layout_builder_test_node_view(array &$build, EntityInterface $entity, E
       '#markup' => 'Extra, Extra read all about it.',
     ];
   }
+  if ($display->getComponent('layout_builder_test_2')) {
+    $build['layout_builder_test_2'] = [
+      '#markup' => 'Extra Field 2 is hidden by default.',
+    ];
+  }
 }
 
 /**

core/modules/layout_builder/tests/src/Functional/LayoutBuilderTest.php

@@ -904,6 +904,23 @@ class LayoutBuilderTest extends BrowserTestBase {
 
     $this->drupalGet('node');
     $assert_session->linkExists('Read more');
+
+    // Consider an extra field hidden by default. Make sure it's not displayed.
+    $this->drupalGet('node/1');
+    $assert_session->pageTextNotContains('Extra Field 2 is hidden by default.');
+
+    // View the layout and add the extra field that is not visible by default.
+    $this->drupalGet('admin/structure/types/manage/bundle_with_section_field/display/default/layout');
+    $assert_session->pageTextNotContains('Extra Field 2');
+    $page->clickLink('Add block');
+    $page->clickLink('Extra Field 2');
+    $page->pressButton('Add block');
+    $assert_session->pageTextContains('Extra Field 2');
+    $page->pressButton('Save layout');
+
+    // Confirm that the newly added extra field is visible.
+    $this->drupalGet('node/1');
+    $assert_session->pageTextContains('Extra Field 2 is hidden by default.');
   }
 
   /**