post-game update prepare

backend/voting/views.py

@@ -1,4 +1,5 @@
 from django.shortcuts import render
+from django.db.models import Avg
 from rest_framework.views import APIView
 from rest_framework.response import Response
 from playlist.models import Session, Profile, Track, Vote
@@ -37,4 +38,5 @@ class SessionInfoView(APIView):
 	def get(self, request, session_id):
 		track_count = len(Track.objects.all())
 		vote_count = len(Vote.objects.all())
-		return Response({'track_count': track_count, 'vote_count': vote_count})
+		average_vote = Vote.objects.all().aggregate(Avg("points", default=0))['points__avg']
+		return Response({'track_count': track_count, 'vote_count': vote_count, 'average_vote': average_vote})