Merge pull request #2912 from evazion/opt-post-archive

Fix N+1 queries issues on /post_versions

app/views/post_versions/_listing.html.erb

@@ -37,7 +37,7 @@
           <% if CurrentUser.is_member? %>
             <td>
               <% if post_version.post.visible? %>
-                <% if post_version.id != post_version.post.versions.first.id %>
+                <% if post_version.version != 1 %>
                   <%= link_to "Undo", undo_post_version_path(post_version), :method => :put, :remote => true %> |
                 <% end %>
                 <%= link_to "Revert to", revert_post_path(post_version.post_id, :version_id => post_version.id), :method => :put, :remote => true %>

app/views/post_versions/index.html.erb

@@ -2,7 +2,7 @@
   <div id="a-index">
     <h1>Changes</h1>
 
-    <% if @post_versions.empty? %>
+    <% if @post_versions.length == 0 %>
       <%= render "post_sets/blank" %>
     <% else %>
       <%= render "listing", :post_versions => @post_versions %>