Fix my prev_page code, thanks to riking

app/views/topics/show.html.erb

@@ -21,7 +21,7 @@
 
 
 <p>
-  <% if @topic_view.posts.length > 0 && @topic_view.prev_page %>
+  <% if @topic_view.prev_page %>
     <%= link_to t(:prev_page), @topic_view.prev_page_path, rel: 'prev' %>
   <% end %>
   <% if @topic_view.next_page %>

lib/topic_view.rb

@@ -60,7 +60,7 @@ class TopicView
   end
 
   def prev_page
-    if @page && @page > 1
+    if @page && @page > 1 && posts.length > 0
       @page - 1
     else
       nil