Add slug to categories.

Gemfile

@@ -70,3 +70,5 @@ gem 'rdiscount'
 gem 'paperclip'
 gem 'acts_as_markup'
 gem 'haml'
+
+gem 'slugtastic'

Gemfile.lock

@@ -190,6 +190,7 @@ GEM
     shoulda-matchers (2.1.0)
       activesupport (>= 3.0.0)
     slop (3.4.3)
+    slugtastic (1.2.1)
     sprockets (2.2.2)
       hike (~> 1.2)
       multi_json (~> 1.0)
@@ -253,6 +254,7 @@ DEPENDENCIES
   ruby_parser
   sass-rails (~> 3.2.0)
   shoulda-matchers
+  slugtastic
   sqlite3-ruby
   squeel
   uglifier

app/models/category.rb

@@ -1,3 +1,6 @@
 class Category < ActiveRecord::Base
-    has_and_belongs_to_many :photos
+  has_and_belongs_to_many :photos
+  validates_presence_of :name, :slug
+
+  has_slug :slug, from: :name
 end

app/views/admin/categories/_category.html.haml

@@ -1,5 +1,6 @@
 %tr
   %td= category.name
+  %td= category.slug
   %td= category.base_colour
   %td{ :class => :actions }
     = link_to 'Show', [:admin, category]

app/views/admin/categories/_form.html.haml

@@ -1,3 +1,3 @@
 = semantic_form_for [:admin, category] do |f|
-  = f.inputs :name, :description, :base_colour, :sort
+  = f.inputs :name, :slug, :description, :base_colour, :sort
   = f.actions

app/views/admin/categories/index.html.haml

@@ -4,12 +4,13 @@
   %thead
     %tr
       %th Name
+      %th Slug
       %th Base Colour
       %th
   %tbody
     = render :partial => "category", :collection => @categories
   %tfoot
     %tr
-      %td{:colspan => 4}
+      %td{:colspan => 5}
 %br/
 = link_to 'New Category', new_admin_category_path, :class => [:button, :new]

db/migrate/20130522071132_add_slug_to_categories.rb

@@ -0,0 +1,5 @@
+class AddSlugToCategories < ActiveRecord::Migration
+  def change
+    add_column :categories, :slug, :string
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20111030164012) do
+ActiveRecord::Schema.define(:version => 20130522071132) do
 
   create_table "admin_users", :force => true do |t|
     t.string   "email",                                 :default => "", :null => false
@@ -47,6 +47,7 @@ ActiveRecord::Schema.define(:version => 20111030164012) do
     t.integer  "photo_id"
     t.string   "base_colour"
     t.integer  "sort"
+    t.string   "slug"
   end
 
   create_table "categories_photos", :id => false, :force => true do |t|