diff --git a/Classes/Connection/Elasticsearch/DocumentFactory.php b/Classes/Connection/Elasticsearch/DocumentFactory.php
index 99d29e5..390c592 100644
--- a/Classes/Connection/Elasticsearch/DocumentFactory.php
+++ b/Classes/Connection/Elasticsearch/DocumentFactory.php
@@ -61,7 +61,10 @@ class DocumentFactory implements Singleton
         $identifier = $document['search_identifier'];
         unset($document['search_identifier']);
 
-        $this->logger->debug('Convert document to document', [$identifier, $document]);
+        $this->logger->debug(
+            sprintf('Convert %s %u to document.', $documentType, $identifier),
+            [$identifier, $document]
+        );
         return new \Elastica\Document($identifier, $document);
     }
 
diff --git a/Classes/Domain/Index/TcaIndexer/RelationResolver.php b/Classes/Domain/Index/TcaIndexer/RelationResolver.php
index b09e483..483fa4b 100644
--- a/Classes/Domain/Index/TcaIndexer/RelationResolver.php
+++ b/Classes/Domain/Index/TcaIndexer/RelationResolver.php
@@ -20,13 +20,10 @@ namespace Codappix\SearchCore\Domain\Index\TcaIndexer;
  * 02110-1301, USA.
  */
 
-use TYPO3\CMS\Backend\Utility\BackendUtility;
-use TYPO3\CMS\Core\SingletonInterface as Singleton;
-use TYPO3\CMS\Core\Utility\GeneralUtility;
-use TYPO3\CMS\Extbase\Utility\LocalizationUtility;
-
 use TYPO3\CMS\Backend\Form\FormDataCompiler;
 use TYPO3\CMS\Backend\Form\FormDataGroup\TcaDatabaseRecord;
+use TYPO3\CMS\Core\SingletonInterface as Singleton;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
 
 /**
  * Resolves relations from TCA using TCA.
@@ -81,7 +78,7 @@ class RelationResolver implements Singleton
     protected function resolveValue($value, array $tcaColumn)
     {
         if ($value === '' || $value === '0') {
-            return '';
+            return [];
         }
         if ($tcaColumn['config']['type'] === 'select') {
             return $this->resolveSelectValue($value, $tcaColumn);
@@ -93,7 +90,7 @@ class RelationResolver implements Singleton
             return $this->resolveInlineValue($tcaColumn);
         }
 
-        return '';
+        return [];
     }
 
     /**