From d09a3e6c57b82fdc8ee583ccbd302ca4825d1f42 Mon Sep 17 00:00:00 2001
From: Dane Powell <git@danepowell.com>
Date: Thu, 26 Oct 2017 15:03:44 -0700
Subject: [PATCH] Issue #2915036 by Dane Powell: Fixed view modes not updating
 in response to new fields.

---
 core/modules/field/field.module                    | 40 +++++++++++++++
 .../tests/src/Kernel/DisplayModeUpdateTest.php     | 57 ++++++++++++++++++++++
 2 files changed, 97 insertions(+)
 create mode 100644 core/modules/field/tests/src/Kernel/DisplayModeUpdateTest.php

diff --git a/core/modules/field/field.module b/core/modules/field/field.module
index 1a18b91d73..ebc825711d 100644
--- a/core/modules/field/field.module
+++ b/core/modules/field/field.module
@@ -6,6 +6,8 @@
  */
 
 use Drupal\Core\Config\ConfigImporter;
+use Drupal\Core\Entity\Entity\EntityFormDisplay;
+use Drupal\Core\Entity\Entity\EntityViewDisplay;
 use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Entity\DynamicallyFieldableEntityStorageInterface;
 use Drupal\field\ConfigImporterFieldPurger;
@@ -347,6 +349,43 @@ function field_form_config_admin_import_form_alter(&$form, FormStateInterface $f
   }
 }
 
+/**
+ * Implements hook_ENTITY_TYPE_insert() for 'field_config'.
+ *
+ * Allow other view modes to update their configuration for the new field.
+ */
+function field_field_config_insert(FieldConfigInterface $field) {
+  if ($field->isSyncing()) {
+    // Don't change anything during a configuration sync.
+    return;
+  }
+
+  $entity_type_id = $field->getTargetEntityTypeId();
+  $bundle = $field->getTargetBundle();
+
+  $entity_display_repository = \Drupal::service('entity_display.repository');
+  $view_modes = $entity_display_repository->getViewModes($entity_type_id);
+  $form_modes = $entity_display_repository->getFormModes($entity_type_id);
+
+  // Update view modes.
+  foreach ($view_modes as $view_mode_id => $view_mode) {
+    if ($view_mode['status']) {
+      if ($display = EntityViewDisplay::load($entity_type_id . '.' . $bundle . '.' . $view_mode_id)) {
+        $display->save();
+      }
+    }
+  }
+
+  // Update form modes.
+  foreach ($form_modes as $form_mode_id => $form_mode) {
+    if ($form_mode['status']) {
+      if ($form_display = EntityFormDisplay::load($entity_type_id . '.' . $bundle . '.' . $form_mode_id)) {
+        $form_display->save();
+      }
+    }
+  }
+}
+
 /**
  * Implements hook_ENTITY_TYPE_update() for 'field_storage_config'.
  *
@@ -379,6 +418,7 @@ function field_field_storage_config_update(FieldStorageConfigInterface $field_st
       $field->save();
     }
   }
+
 }
 
 /**
diff --git a/core/modules/field/tests/src/Kernel/DisplayModeUpdateTest.php b/core/modules/field/tests/src/Kernel/DisplayModeUpdateTest.php
new file mode 100644
index 0000000000..3a1637f16c
--- /dev/null
+++ b/core/modules/field/tests/src/Kernel/DisplayModeUpdateTest.php
@@ -0,0 +1,57 @@
+<?php
+
+namespace Drupal\Tests\field\Kernel;
+
+use Drupal\field\Entity\FieldConfig;
+use Drupal\field\Entity\FieldStorageConfig;
+use Drupal\Core\Entity\Entity\EntityViewDisplay;
+use Drupal\Core\Entity\Entity\EntityViewMode;
+
+/**
+ * Tests exposing field definitions for configurable fields.
+ *
+ * @group field
+ */
+class DisplayModeUpdateTest extends FieldKernelTestBase {
+
+  /**
+   * Makes sure that display modes are updated when a field is created.
+   */
+  public function testDisplayModeUpdate() {
+    entity_test_create_bundle('entity_test', 'entity_test');
+
+    EntityViewMode::create([
+      'id' => 'entity_test.foobar',
+      'targetEntityType' => 'entity_test',
+      'status' => TRUE,
+      'enabled' => TRUE,
+      'label' => 'My view mode',
+    ])->save();
+
+    $display = EntityViewDisplay::create([
+      'targetEntityType' => 'entity_test',
+      'bundle' => 'entity_test',
+      'mode' => 'foobar',
+      'label' => 'My view mode',
+      'status' => TRUE,
+    ]);
+    $display->save();
+
+    $field_storage = FieldStorageConfig::create([
+      'field_name' => 'field_test',
+      'entity_type' => 'entity_test',
+      'type' => 'test_field',
+      'cardinality' => 1,
+    ]);
+    $field_storage->save();
+
+    FieldConfig::create([
+      'field_storage' => $field_storage,
+      'bundle' => 'entity_test',
+    ])->save();
+
+    $display = EntityViewDisplay::load('entity_test.entity_test.foobar');
+    debug($display->getComponent('field_test'));
+  }
+
+}
-- 
2.14.1