http://www.broadcastingadam.com/2012/07/advanced_caching_part_2-using_strategies/

advanced_caching_part_2-using_strategies.rb

# http://www.broadcastingadam.com/2012/07/advanced_caching_part_2-using_strategies/

# Step 3: Caching Views Generated from Arrays

# missing "}"
class Post
  def cache_key
    Digest::MD5.hexdigest "#{maximum(:updated_at).try(:to_i)}-#{count}"
  end
end

# missing "do"s after "cache" method calls
<% cache @posts do  %>
  <% @posts.each do |post| %>
    <% cache post, 'main-listing' do %>
      <p>
        <%= link_to post.author, author_path(post.author) %>
        <%= link_to post.title, post_path(post) %><br \>
        <%= truncate post.body %>
        <%= post.comments.count %><%= pluralize "comments", post.comments.count %>
      </p>
    <% end %>
  <% end %>
<% end %>