Remove individual blacklisting of music in GameCreateView and update all related music to blacklisted in GameEndView

Fix #8

game/views.py

@@ -327,8 +327,6 @@ class GameCreateView(LoginRequiredMixin, CreateView):
         pm_list = list(zip(players, musics))
         random.shuffle(pm_list)
         for (player, music), order in zip(pm_list, range(1, len(pm_list) + 1)):
-            music.blacklisted = True
-            music.save()
             models.MusicGameOrder.objects.create(
                 game=form.instance, player=player, music_video=music, order=order
             )
@@ -481,6 +479,9 @@ class GameEndView(LoginRequiredMixin, SingleObjectMixin, View):
         if not game.group.is_leader(request.user):
             raise PermissionDenied()
         game.over = True
+        models.MusicVideo.objects.filter(musicgameorder__game=game).update(
+            blacklisted=True
+        )
 
         for go in game.musicgameorder_set.all():
             go.update_value()