Fix entity revision interface. (#685)

Author: fubhy

modules/graphql_core/src/Plugin/Deriver/EntityTypeDeriverBase.php

@@ -66,17 +66,22 @@ protected function getInterfaces(EntityTypeInterface $type, array $basePluginDef
     $pairs = [
       '\Drupal\Core\Entity\EntityDescriptionInterface' => 'EntityDescribable',
       '\Drupal\Core\Entity\EntityPublishedInterface' => 'EntityPublishable',
-      '\Drupal\Core\Entity\RevisionableInterface' => 'EntityRevisionable',
       '\Drupal\user\EntityOwnerInterface' => 'EntityOwnable',
     ];
 
     $interfaces = isset($basePluginDefinition['interfaces']) ? $basePluginDefinition['interfaces'] : [];
+    $interfaces[] = 'Entity';
+
     foreach ($pairs as $dependency => $interface) {
       if ($type->entityClassImplements($dependency)) {
         $interfaces[] = $interface;
       }
     }
 
+    if ($type->isRevisionable()) {
+      $interfaces[] = 'EntityRevisionable';
+    }
+
     return array_unique($interfaces);
   }
 

modules/graphql_core/src/Plugin/GraphQL/Fields/Entity/EntityRevisions.php

@@ -5,6 +5,7 @@
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\graphql\GraphQL\Execution\ResolveContext;
 use Drupal\graphql_core\Plugin\GraphQL\Fields\EntityQuery\EntityQuery;
+use Drupal\graphql_core\Plugin\GraphQL\Interfaces\Entity\EntityRevisionable;
 use GraphQL\Type\Definition\ResolveInfo;
 
 /**