Do not show tag when article_count is zero

app/helpers/application_helper.rb

@@ -21,6 +21,6 @@ def join_tags(article)
 
   def cache_key_for_tags
     last_updated_at = Tag.maximum(:updated_at).try(:utc).try(:to_s, :number)
-    "tags-#{last_updated_at}"
+    "tags-#{last_updated_at}-v1"
   end
 end

app/views/tags/_tag.html.haml

@@ -1,6 +1,7 @@
-- cache tag do
-  %li{class: tag.draft? ? "tag admin" : "tag"}
-    = link_to tagging_path(tag), :class=>'aside_tag' do
-      %span{class: 'label'}= tag.name
-    %span.count
-      × #{tag.articles_count}
+- if tag.articles_count > 0
+  - cache tag do
+    %li{class: tag.draft? ? "tag admin" : "tag"}
+      = link_to tagging_path(tag), :class=>'aside_tag' do
+        %span{class: 'label'}= tag.name
+      %span.count
+        × #{tag.articles_count}