posts sorted by public date or event start depend on post type

fet2020/posts/views.py

@@ -24,7 +24,7 @@ logger = logging.getLogger(__name__)
 
 def index(request):
     "Index von aktuellen Posts"
-    posts = deque(Post.objects.get_visible_articles().order_by("-public_date"))
+    posts = deque(Post.objects.get_date_sorted_list())
 
     taglist = map(lambda post: post.tags, posts)