Various changes since last time, such as adding user login authentication, with the following in the User model, which seems to mimic the WordPress authentication (at least for my password):

def check_password(plaintext_password)
  require 'phpass'
  return, self.user_pass)

Thanks to Aaron Hill for a helpful post on that topic.

Biggest change has been the introduction of permalinks, and making it possible to view each blog post on a separate page. Within the Post model, I added the following:

def self.find_by_permalink(permalink)
  year, month, day, name = permalink.split('/')
  name ||= ''
  find(:first, :conditions => ["YEAR(post_date) = ? AND MONTH(post_date) = ? AND DAYOFMONTH(post_date) = ? AND post_name = ?", year.to_i, month.to_i, day.to_i, name])

def to_param

def permalink
  post_date.strftime("%Y/%m/%d") + (post_name.empty? ? '' : "/#{post_name}")

Thanks to the author of this snippet for some of that.

Then in routes.rb, I have:

resources :posts, :only => [:index, :new, :create]
resources :posts, :only => [:show, :update, :destroy, :edit], :path => '', :id => /\d{4}\/\d{2}\/\d{2}(\/[0-9a-z\-_]+)?/

This preserves and URLs for listing and creating posts, but allows as a permalink for the post itself (allowing lower-case letters, numbers, hyphens and underscores).

(I’ll leave the smileys in, just to show how clever WordPress is…)

Finally, within PostsController, replace all the Post.find occurrences with Post.find_by_permalink, and I think that’s all!