Everything is working well, categories and photos are a 1 to many right now though and they need to be many to many.

app/controllers/categories_controller.rb

@@ -0,0 +1,84 @@
+class CategoriesController < ApplicationController
+  layout "photos"
+  # GET /categories
+  # GET /categories.xml
+  def index
+    @categories = Category.all
+
+    respond_to do |format|
+      format.html # index.html.erb
+      format.xml  { render :xml => @categories }
+    end
+  end
+
+  # GET /categories/1
+  # GET /categories/1.xml
+  def show
+    @category = Category.find(params[:id])
+
+    respond_to do |format|
+      format.html # show.html.erb
+      format.xml  { render :xml => @category }
+    end
+  end
+
+  # GET /categories/new
+  # GET /categories/new.xml
+  def new
+    @category = Category.new
+
+    respond_to do |format|
+      format.html # new.html.erb
+      format.xml  { render :xml => @category }
+    end
+  end
+
+  # GET /categories/1/edit
+  def edit
+    @category = Category.find(params[:id])
+  end
+
+  # POST /categories
+  # POST /categories.xml
+  def create
+    @category = Category.new(params[:category])
+
+    respond_to do |format|
+      if @category.save
+        format.html { redirect_to(@category, :notice => 'Category was successfully created.') }
+        format.xml  { render :xml => @category, :status => :created, :location => @category }
+      else
+        format.html { render :action => "new" }
+        format.xml  { render :xml => @category.errors, :status => :unprocessable_entity }
+      end
+    end
+  end
+
+  # PUT /categories/1
+  # PUT /categories/1.xml
+  def update
+    @category = Category.find(params[:id])
+
+    respond_to do |format|
+      if @category.update_attributes(params[:category])
+        format.html { redirect_to(@category, :notice => 'Category was successfully updated.') }
+        format.xml  { head :ok }
+      else
+        format.html { render :action => "edit" }
+        format.xml  { render :xml => @category.errors, :status => :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /categories/1
+  # DELETE /categories/1.xml
+  def destroy
+    @category = Category.find(params[:id])
+    @category.destroy
+
+    respond_to do |format|
+      format.html { redirect_to(categories_url) }
+      format.xml  { head :ok }
+    end
+  end
+end

app/controllers/photos_controller.rb

@@ -1,11 +1,17 @@
 class PhotosController < ApplicationController
     def new
         @photo = Photo.new
+        @categories = Category.find(:all).map { |c| [c.name, c.id] }
     end
 
     def index
+        if params[:category_id]
+            @category = Category.find_by_id(params[:category_id])
+            @photos = Photo.find(:all, :conditions => { :category_id => params[:category_id] })
+        else
             @photos = Photo.find(:all)
         end
+    end
     
     def create
         @photo = Photo.new(params[:photo])

app/helpers/categories_helper.rb

@@ -0,0 +1,2 @@
+module CategoriesHelper
+end

app/models/photo.rb

@@ -1,5 +1,22 @@
+require 'exifr'
+
 class Photo < ActiveRecord::Base
     belongs_to :category
 
-    has_attached_file :photo, :styles => { :large => "1024x1024>", :thumb => "140x140#", :admin_thumb => "40x40#" }
+    has_attached_file :photo, :styles => {  :original => "1024x1024>",
+                                            :size11 => "308x308#",
+                                            :size8 => "224x224#",
+                                            :size5 => "140x140#",
+                                            :size3 => "84x84#",
+                                            :size2 => "56x56#" }
+
+    validates_presence_of :category
+
+    before_post_process :get_exif
+
+private
+    def get_exif
+        exif = EXIFR::JPEG.new(photo.queued_for_write[:original].path)
+        self.description = exif.image_description
+    end
 end

app/views/categories/edit.html.erb

@@ -0,0 +1,28 @@
+<h1>Editing category</h1>
+
+<% form_for(@category) do |f| %>
+  <%= f.error_messages %>
+
+  <p>
+    <%= f.label :name %><br />
+    <%= f.text_field :name %>
+  </p>
+  <p>
+    <%= f.label :description %><br />
+    <%= f.text_area :description %>
+  </p>
+  <p>
+    <%= f.label :photo_id %><br />
+    <%= f.text_field :photo_id %>
+  </p>
+  <p>
+    <%= f.label :base_colour %><br />
+    <%= f.text_field :base_colour %>
+  </p>
+ <p>
+    <%= f.submit 'Update' %>
+  </p>
+<% end %>
+
+<%= link_to 'Show', @category %> |
+<%= link_to 'Back', categories_path %>

app/views/categories/index.html.erb

@@ -0,0 +1,14 @@
+<div class="sg-24 sgParent">
+
+<% @categories.each do |category| %>
+    <div class="sg-8 sgParent">
+		<div class="category sg-7" style="background: <%= category.base_colour %>">
+	        <%= link_to '<h3>'+h(category.name.downcase)+'</h3>', category_photos_path(category) %>
+		</div>
+    </div>
+<% end %>
+
+    <div class="sg-7 category blank-category">
+    </div>
+
+</div>

app/views/categories/new.html.erb

@@ -0,0 +1,27 @@
+<h1>New category</h1>
+
+<% form_for(@category) do |f| %>
+  <%= f.error_messages %>
+
+  <p>
+    <%= f.label :name %><br />
+    <%= f.text_field :name %>
+  </p>
+  <p>
+    <%= f.label :description %><br />
+    <%= f.text_area :description %>
+  </p>
+  <p>
+    <%= f.label :photo_id %><br />
+    <%= f.text_field :photo_id %>
+  </p>
+  <p>
+    <%= f.label :base_colour %><br />
+    <%= f.text_field :base_colour %>
+  </p>
+  <p>
+    <%= f.submit 'Create' %>
+  </p>
+<% end %>
+
+<%= link_to 'Back', categories_path %>

app/views/categories/show.html.erb

@@ -0,0 +1,18 @@
+<p>
+  <b>Name:</b>
+  <%=h @category.name %>
+</p>
+
+<p>
+  <b>Description:</b>
+  <%=h @category.description %>
+</p>
+
+<p>
+  <b>Photo:</b>
+  <%=h @category.photo_id %>
+</p>
+
+
+<%= link_to 'Edit', edit_category_path(@category) %> |
+<%= link_to 'Back', categories_path %>

app/views/layouts/categories.html.erb

@@ -0,0 +1,17 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+       "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head>
+  <meta http-equiv="content-type" content="text/html;charset=UTF-8" />
+  <title>Categories: <%= controller.action_name %></title>
+  <%= stylesheet_link_tag 'scaffold' %>
+</head>
+<body>
+
+<p style="color: green"><%= notice %></p>
+
+<%= yield %>
+
+</body>
+</html>

app/views/photos/index.html.erb

@@ -1,5 +1,11 @@
+<% if @category %>
+	<div class="sg-5 category" style="background: <%= @category.base_colour %>">
+		<h3><%=h @category.name.downcase %></h3>
+	</div>
+<% end %>
+
 <% @photos.each do |photo| %>
 
-    <div class="sg-5 image140"><%= link_to image_tag(photo.photo.url(:thumb)), photo.photo.url(:large), :rel => 'photo', :class => 'fancy' %></div>
+    <div class="sg-5 photo" style="background: url('<%= photo.photo.url(:size5) %>')"><%= link_to '&nbsp;', photo.photo.url, :rel => 'photo', :class => 'fancy' %></div>
 
 <% end %>

app/views/photos/new.html.erb

@@ -6,6 +6,10 @@
         <%= f.label :image_file %>:<br />
         <%= f.file_field :photo %>
     </p>
+    <p>
+        <%= f.label :category %>
+        <%= f.select :category_id, @categories %>
+    </p>
     <p>
         <%= submit_tag 'Upload' %>
     </p>

app/views/photos/show.html.erb

@@ -1 +1 @@
-<%= link_to image_tag(@photo.photo.url(:thumb)), @photo.photo.url(:large) %>
+<%= link_to image_tag(@photo.photo.url(:size11)), @photo.photo.url %>

config/routes.rb

@@ -1,7 +1,4 @@
 ActionController::Routing::Routes.draw do |map|
-
-  map.resources :photos
-
   # The priority is based upon order of creation: first created -> highest priority.
 
   # Sample of regular route:
@@ -41,6 +38,9 @@ ActionController::Routing::Routes.draw do |map|
   # Install the default routes as the lowest priority.
   # Note: These default routes make all actions in every controller accessible via GET requests. You should
   # consider removing or commenting them out if you're using named routes and resources.
+  map.resources :categories, :has_many => :photos
+  map.resources :photos
+  
   map.connect ':controller/:action/:id'
   map.connect ':controller/:action/:id.:format'
 end

db/migrate/20101008101157_add_photo_to_category.rb

@@ -0,0 +1,9 @@
+class AddPhotoToCategory < ActiveRecord::Migration
+  def self.up
+      add_column :categories, :photo_id, :integer
+  end
+
+  def self.down
+      remove_column :categories, :photo_id
+  end
+end

db/migrate/20101008103053_add_details_to_photo.rb

@@ -0,0 +1,11 @@
+class AddDetailsToPhoto < ActiveRecord::Migration
+  def self.up
+      add_column :photos, :title, :string
+      add_column :photos, :description, :text
+  end
+
+  def self.down
+      remove_column :photos, :title
+      remove_column :photos, :description
+  end
+end

db/migrate/20101008105348_add_colour_to_category.rb

@@ -0,0 +1,9 @@
+class AddColourToCategory < ActiveRecord::Migration
+  def self.up
+    add_column :categories, :base_colour, :string
+  end
+
+  def self.down
+    remove_column :categories, :base_colour
+  end
+end

db/migrate/20101008122736_add_sort_orders.rb

@@ -0,0 +1,11 @@
+class AddSortOrders < ActiveRecord::Migration
+  def self.up
+    add_column :photos, :sort, :integer
+    add_column :categories, :sort, :integer
+  end
+
+  def self.down
+      remove_column :photos, :sort
+      remove_column :categories, :sort
+  end
+end

db/schema.rb

@@ -9,13 +9,16 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20101006095457) do
+ActiveRecord::Schema.define(:version => 20101008122736) do
 
   create_table "categories", :force => true do |t|
     t.string   "name"
     t.text     "description"
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.integer  "photo_id"
+    t.string   "base_colour"
+    t.integer  "sort"
   end
 
   create_table "photos", :force => true do |t|
@@ -27,6 +30,9 @@ ActiveRecord::Schema.define(:version => 20101006095457) do
     t.datetime "photo_updated_at"
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.string   "title"
+    t.text     "description"
+    t.integer  "sort"
   end
 
 end

public/stylesheets/photos.css

@@ -1,5 +1,11 @@
 body {
     background: black;
+    color: white;
+    font-family: "Helvetica Neue", "Arial", "Helvatica", sans-serif;
+    font-size: 14px;
+}
+a {
+	text-decoration: none;
 }
 #container {
     padding-top: 20px;
@@ -19,8 +25,44 @@ body {
     bottom: 15px;
     right: 20px;
 }
-.image140 {
+.sg-5 {
     height: 140px;
 }
+.sg-5 a {
+	height: 140px;
+	width: 140px;
+}
+.sg-7 {
+	height: 196px;
+}
+.sg-7 a {
+	height: 196px;
+	width: 196px;
+}
+.category {
+    position: relative;
+}
+.category a, .photo a {
+	display: block;
+    color: white;
+    text-decoration: none;
+}
+.category a:focus, .photo a:focus {
+	background: rgba(255,255,255,0.1);
+}
+.category a:hover, .photo a:hover {
+	background: rgba(255,255,255,0.2);
+}
+.blank-category {
+    background: #222;
+    outline: 1px dashed #444;
+}
+.category h3 {
+    position: absolute;
+    top: 10px;
+    right: 20px;
+    font-weight: normal;
+    font-size: 1.1em;
+}
 img {
 }

public/stylesheets/scaffold.css

@@ -0,0 +1,54 @@
+body { background-color: #fff; color: #333; }
+
+body, p, ol, ul, td {
+  font-family: verdana, arial, helvetica, sans-serif;
+  font-size:   13px;
+  line-height: 18px;
+}
+
+pre {
+  background-color: #eee;
+  padding: 10px;
+  font-size: 11px;
+}
+
+a { color: #000; }
+a:visited { color: #666; }
+a:hover { color: #fff; background-color:#000; }
+
+.fieldWithErrors {
+  padding: 2px;
+  background-color: red;
+  display: table;
+}
+
+#errorExplanation {
+  width: 400px;
+  border: 2px solid red;
+  padding: 7px;
+  padding-bottom: 12px;
+  margin-bottom: 20px;
+  background-color: #f0f0f0;
+}
+
+#errorExplanation h2 {
+  text-align: left;
+  font-weight: bold;
+  padding: 5px 5px 5px 15px;
+  font-size: 12px;
+  margin: -7px;
+  background-color: #c00;
+  color: #fff;
+}
+
+#errorExplanation p {
+  color: #333;
+  margin-bottom: 0;
+  padding: 5px;
+}
+
+#errorExplanation ul li {
+  font-size: 12px;
+  list-style: square;
+}
+

test/functional/categories_controller_test.rb

@@ -0,0 +1,45 @@
+require 'test_helper'
+
+class CategoriesControllerTest < ActionController::TestCase
+  test "should get index" do
+    get :index
+    assert_response :success
+    assert_not_nil assigns(:categories)
+  end
+
+  test "should get new" do
+    get :new
+    assert_response :success
+  end
+
+  test "should create category" do
+    assert_difference('Category.count') do
+      post :create, :category => { }
+    end
+
+    assert_redirected_to category_path(assigns(:category))
+  end
+
+  test "should show category" do
+    get :show, :id => categories(:one).to_param
+    assert_response :success
+  end
+
+  test "should get edit" do
+    get :edit, :id => categories(:one).to_param
+    assert_response :success
+  end
+
+  test "should update category" do
+    put :update, :id => categories(:one).to_param, :category => { }
+    assert_redirected_to category_path(assigns(:category))
+  end
+
+  test "should destroy category" do
+    assert_difference('Category.count', -1) do
+      delete :destroy, :id => categories(:one).to_param
+    end
+
+    assert_redirected_to categories_path
+  end
+end

test/unit/helpers/categories_helper_test.rb

@@ -0,0 +1,4 @@
+require 'test_helper'
+
+class CategoriesHelperTest < ActionView::TestCase
+end