diff --git a/js/controller/CardController.js b/js/controller/CardController.js
index 0754c80c5..29ce7e9fe 100644
--- a/js/controller/CardController.js
+++ b/js/controller/CardController.js
@@ -101,8 +101,8 @@ app.controller('CardController', function ($scope, $rootScope, $sce, $location,
 		var reg = /\[(X|\s|\_|\-)\]\s(.*)/ig;
 		var nth = 0;
 		$scope.status.edit.description = $scope.status.edit.description.replace(reg, function (match, i, original) {
+			var result = match;
 			if (nth++ === id) {
-				var result;
 				if (match.match(/^\[\s\]/i)) {
 					result = match.replace(/\[\s\]/i, '[x]');
 				}
diff --git a/lib/Db/AttachmentMapper.php b/lib/Db/AttachmentMapper.php
index 371122f2c..1bdf82b33 100644
--- a/lib/Db/AttachmentMapper.php
+++ b/lib/Db/AttachmentMapper.php
@@ -37,6 +37,7 @@ class AttachmentMapper extends DeckMapper implements IPermissionMapper {
 
 	private $cardMapper;
 	private $userManager;
+	private $qb;
 
 	public function __construct(IDBConnection $db, CardMapper $cardMapper, IUserManager $userManager) {
 		parent::__construct($db, 'deck_attachment', Attachment::class);
@@ -111,21 +112,6 @@ class AttachmentMapper extends DeckMapper implements IPermissionMapper {
 		return $entities;
 	}
 
-	/**
-	 * @param Attachment $attachment
-	 * @throws \Exception
-	 */
-	public function mapParticipant(Attachment $attachment) {
-		$userManager = $this->userManager;
-		$attachment->resolveRelation('participant', function() use (&$userManager, &$attachment) {
-			$user = $userManager->get($attachment->getParticipant());
-			if ($user !== null) {
-				return new User($user);
-			}
-			return null;
-		});
-	}
-
 
 	/**
 	 * Check if $userId is owner of Entity with $id
diff --git a/lib/Service/CardService.php b/lib/Service/CardService.php
index 540913f72..f76ce220e 100644
--- a/lib/Service/CardService.php
+++ b/lib/Service/CardService.php
@@ -40,6 +40,7 @@ class CardService {
 	private $permissionService;
 	private $boardService;
 	private $assignedUsersMapper;
+	private $attachmentService;
 
 	public function __construct(CardMapper $cardMapper, StackMapper $stackMapper, PermissionService $permissionService, BoardService $boardService, AssignedUsersMapper $assignedUsersMapper, AttachmentService $attachmentService) {
 		$this->cardMapper = $cardMapper;