added show action

app/controllers/blog_controller.rb

@@ -2,5 +2,9 @@ class BlogController < ApplicationController
   def index
     @photos = Photo.all
   end
-
+
+  def show
+    @photo = Photo.find(params[:id])
+  end
+
 end

app/models/photo.rb

@@ -1,5 +1,5 @@
 class Photo
-  attr_accessor :id, :url_thumbnail
+  attr_accessor :id, :thumbnail_url, :large_url
   require 'open-uri'
 
   def initialize(attributes = {})
@@ -13,8 +13,17 @@ def self.all
     doc.css("photo").map do |photo|
       self.new(
         :id => photo.attr("id"),
-        :url_thumbnail => photo.attr("url_sq")
+        :thumbnail_url => photo.attr("url_sq"),
+        :large_url => photo.attr("url_l")
       )
     end
   end
+
+  def self.find(id)
+    self.all.select{|photo| photo.id == id}.first
+  end
+
+  def to_param
+    self.id
+  end
 end

app/views/blog/index.html.erb

@@ -3,6 +3,8 @@
 
 <ul>
 <% @photos.each do |photo| %>
-	<li><img src="<%= photo.url_thumbnail %>" /></li>
+    <li>
+        <%= link_to(image_tag(photo.thumbnail_url), show_path(photo)) %>
+    </li>
 <% end %>
 </ul>

app/views/blog/show.html.erb

@@ -0,0 +1 @@
+<%= image_tag @photo.large_url %>

config/routes.rb

@@ -1,6 +1,9 @@
 Flickrblog::Application.routes.draw do
-  get "blog/index"
   root :to => "blog#index"
+
+  match 'show/:id' => 'blog#show', :as => :show
+
+  # get "blog/index"
 
   # The priority is based upon order of creation:
   # first created -> highest priority.