Non Active Record Model

Non Active Record Model
<br /><br /><br /># models/letter.rb<br />class Letter<br /> attr_reader :char<br /> <br /> def self.all<br /> ('A'..'Z').map { |c| new(c) }<br /> end<br /> <br /> def self.find(param)<br /> all.detect { |l| l.to_param == param } || raise(ActiveRecord::RecordNotFound)<br /> end<br /> <br /> def initialize(char)<br /> @char = char<br /> end<br /> <br /> def to_param<br /> @char.downcase<br /> end<br /> <br /> def products<br /> Product.find(:all, :conditions => ["name LIKE ?", @char + '%'], :order => "name")<br /> end<br />end<br /><br /># letters_controller.rb<br />def index<br /> @letters = Letter.all<br />end<br /><br />def show<br /> @letter = Letter.find(params[:id])<br />end<br /><br /><br /><br /><br /><!-- letters/index.html.erb --><br /><% title "Select a Letter" %><br /><br /><% for letter in @letters %><br /> <%= link_to letter.char, letter %><br /><% end %><br /><br /><!-- letters/show.html.erb --><br /><% title "Products for Letter #{@letter.char}" %><br /><br /><p><%= link_to "Select a Letter", letters_path %></p><br /><br /><%= render :partial => @letter.products %><br />