<%- topic.posts.select{ |post| !post.new_record? }.each_with_index do |post, i| %>
  <%= render :partial => post %>
<%- end %>

<%- topic.posts.select{ |post| !post.new_record? }.sort_by(&:created_at).each_with_index do |post, i| %>
  <%= render :partial => post %>
<%- end %>

Update Post Listing to Order by Date
Update Post Listing to Order by Date

List all posts in the order that they are created, more like a
traditional Discussion Board.
