Not ready yet for cache_key on ActiveRecord::Relation

app/models/asciicast.rb

@@ -23,10 +23,6 @@ class Asciicast < ActiveRecord::Base
     update_all(:user_id => user.id, :user_token => nil)
   end
 
-  def self.cache_key
-    Digest::MD5.hexdigest "#{scoped.maximum(:updated_at).try(:to_i)}-#{scoped.count}"
-  end
-
   def meta=(file)
     data = JSON.parse(file.tempfile.read)
 

app/views/asciicasts/_previews.html.erb

@@ -1,5 +1,3 @@
 <div class="presentations">
-  <% cache @asciicasts do -%>
-    <%= render :partial => 'asciicasts/preview', :collection => @asciicasts %>
-  <% end -%>
+  <%= render :partial => 'asciicasts/preview', :collection => @asciicasts %>
 </div>