MAPG-235 queries with relations on any recursion level implemented

src/Controller/GameController.php

@@ -143,7 +143,7 @@ class GameController
         // select places
 
         $mapId = (int) $this->request->post('mapId');
-        $map = $this->mapRepository->getById($mapId);
+        // $map = $this->mapRepository->getById($mapId);
 
         $places = $this->placeRepository->getRandomNPlaces($mapId, static::NUMBER_OF_ROUNDS, $userId);
 
@@ -242,6 +242,7 @@ class GameController
         $challenge = $this->challengeRepository->getByTokenStr($challengeToken_str);
 
         if(!$this->userInChallengeRepository->isUserParticipatingInChallenge($userId, $challenge)) {
+            // new player is joining
             $userInChallenge = new UserInChallenge();
             $userInChallenge->setUserId($userId);
             $userInChallenge->setChallenge($challenge);