fix merge with master

fet2020/posts/views.py

@@ -202,7 +202,7 @@ def show(request, id=None):
         "author": author,
         "author_image": author_image,
         "next": __next(post, public_only),
-        "previous": get_previous_dict(p),
+        "previous": __previous(post, public_only),
         "related_posts": related_posts[0:6],
         "ep_agenda_link": ep_agenda_link,
         "ep_protocol_link": ep_protocol_link,
@@ -285,17 +285,15 @@ def __next(post=None, public=True):
     return d
 
 
-def get_previous_dict(post=None):
-    # TODO: Docstring
+def __previous(post=None, public=True):
+    """
+    Helper function for getting previous post
+    """
     posts = None
     d = post.slug
 
     if post:
-        # TODO: bad implementation but it works!!
-        if post.post_type == "N" or post.post_type == "E":
-            posts = Post.articles.get_visible_articles()
-        elif post.post_type == "F":
-            posts = FetMeeting.objects.get_queryset().order_by("-event_start")
+        posts = Post.objects.date_sorted_list(public).filter(post_type=post.post_type)
 
     if posts:
         for k, v in enumerate(posts):