fix sitemaps

fet2020/fet2020/sitemaps.py

@@ -1,4 +1,5 @@
 from django.contrib.sitemaps import Sitemap
+
 from posts.models import Post
 
 
@@ -7,7 +8,7 @@ class PostSitemap(Sitemap):
     priority = 1
 
     def items(self):
-        return Post.objects.filter(is_hidden=False)
+        return Post.objects.published()
 
     def lastmod(self, obj):
         return obj.date_modified