--- /dev/null
+<?php
+
+namespace Drupal\field_ui\Routing;
+
+use Drupal\Core\Entity\EntityManagerInterface;
+use Drupal\Core\Routing\Enhancer\RouteEnhancerInterface;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Routing\Route;
+
+/**
+ * Enhances Field UI routes by adding proper information about the bundle name.
+ */
+class FieldUiRouteEnhancer implements RouteEnhancerInterface {
+
+ /**
+ * The entity manager.
+ *
+ * @var \Drupal\Core\Entity\EntityManagerInterface
+ */
+ protected $entityManager;
+
+ /**
+ * Constructs a FieldUiRouteEnhancer object.
+ *
+ * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
+ * The entity manager.
+ */
+ public function __construct(EntityManagerInterface $entity_manager) {
+ $this->entityManager = $entity_manager;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function enhance(array $defaults, Request $request) {
+ if (($bundle = $this->entityManager->getDefinition($defaults['entity_type_id'])->getBundleEntityType()) && isset($defaults[$bundle])) {
+ // Field UI forms only need the actual name of the bundle they're dealing
+ // with, not an upcasted entity object, so provide a simple way for them
+ // to get it.
+ $defaults['bundle'] = $defaults['_raw_variables']->get($bundle);
+ }
+
+ return $defaults;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function applies(Route $route) {
+ return ($route->hasOption('_field_ui'));
+ }
+
+}