Migrate to dragonfly step one.

Gemfile

@@ -13,6 +13,8 @@ group :assets do
   gem 'coffee-rails', "~> 4.0.0"
   gem 'uglifier'
 
+  gem 'sprockets_better_errors'
+
   gem 'bourbon'
 end
 
@@ -75,6 +77,8 @@ gem 'squeel'
 gem 'will_paginate'
 gem 'redcarpet'
 gem 'paperclip'
+gem 'dragonfly'
+gem 'dragonfly-s3_data_store'
 gem 'haml'
 
 gem 'slugtastic'

Gemfile.lock

@@ -88,8 +88,15 @@ GEM
       thread_safe (~> 0.1)
       warden (~> 1.2.3)
     diff-lcs (1.2.5)
+    dragonfly (1.0.3)
+      multi_json (~> 1.0)
+      rack
+    dragonfly-s3_data_store (1.0.3)
+      dragonfly (~> 1.0)
+      fog
     erubis (2.7.0)
     eventmachine (1.0.3)
+    excon (0.31.0)
     execjs (2.0.2)
     factory_girl (4.4.0)
       activesupport (>= 3.0.0)
@@ -97,6 +104,16 @@ GEM
       factory_girl (~> 4.4.0)
       railties (>= 3.0.0)
     fivemat (1.2.1)
+    fog (1.20.0)
+      builder
+      excon (~> 0.31.0)
+      formatador (~> 0.2.0)
+      mime-types
+      multi_json (~> 1.0)
+      net-scp (~> 1.1)
+      net-ssh (>= 2.1.3)
+      nokogiri (>= 1.5.11)
+    formatador (0.2.4)
     haml (4.0.5)
       tilt
     hike (1.2.3)
@@ -118,6 +135,9 @@ GEM
     mini_portile (0.5.2)
     minitest (4.7.5)
     multi_json (1.9.0)
+    net-scp (1.1.2)
+      net-ssh (>= 2.6.5)
+    net-ssh (2.8.0)
     newrelic_rpm (3.7.2.195)
     nokogiri (1.6.1)
       mini_portile (~> 0.5.0)
@@ -196,6 +216,8 @@ GEM
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       sprockets (~> 2.8)
+    sprockets_better_errors (0.0.4)
+      sprockets-rails (>= 1.0.0)
     sqlite3 (1.3.9)
     squeel (1.1.1)
       activerecord (>= 3.0)
@@ -235,6 +257,8 @@ DEPENDENCIES
   capybara-screenshot
   coffee-rails (~> 4.0.0)
   devise
+  dragonfly
+  dragonfly-s3_data_store
   exception_notification!
   factory_girl_rails
   fivemat
@@ -256,6 +280,7 @@ DEPENDENCIES
   shoulda-matchers
   simple_form
   slugtastic
+  sprockets_better_errors
   sqlite3
   squeel
   thin

app/helpers/photos_helper.rb

@@ -1,5 +1,5 @@
 module PhotosHelper
   def link_to_photo(photo)
-    link_to '', photo.photo.url, rel: 'photos', class: 'fancy', id: photo.id
+    link_to '', photo.image.url, rel: 'photos', class: 'fancy', id: photo.id
   end
 end

app/models/photo.rb

@@ -22,6 +22,8 @@ class Photo < ActiveRecord::Base
                             bucket: ENV['AWS_BUCKET_NAME'],
                             url: ':s3_domain_url'
 
+  dragonfly_accessor :image
+
   @@per_page = 11
 
   scope :enabled, lambda {

app/views/admin/photos/_photo.html.haml

@@ -1,5 +1,5 @@
 .photo
-  = link_to image_tag(photo.photo.url(:size5), :title => photo.title), photo.photo.url
+  = link_to image_tag(photo.image.admin.url, :title => photo.title), photo.image.url
   .actions
     = link_to 'Edit', edit_admin_photo_path(photo)
     = link_to 'Destroy', [:admin, photo], confirm: 'Are you sure?', method: :delete

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

@@ -6,6 +6,6 @@
   = render :partial => "photo", :collection => @photos
 
 = will_paginate @products, :remote => true
-  
+
 %br/
 = link_to 'New Photo', new_admin_photo_path, :class => [:button, :new]

app/views/shared/_photo_styles.html.erb

@@ -1,7 +1,7 @@
 <style type="text/css">
   <% photos.each do |photo| %>
     #<%= photo.name.parameterize %>.sg-<%= size %> {
-      background: url(<%= photo.photo.url(:"size#{size}") %>);
+      background: url(<%= photo.image.send(:"size#{size}").url %>);
     }
   <% end %>
   @media
@@ -10,7 +10,7 @@
   only screen and (min-device-pixel-ratio: 1.5) {
     <% photos.each do |photo| %>
       #<%= photo.name.parameterize %>.sg-<%= size %> {
-        background: url(<%= photo.photo.url(:"size#{size}x2") %>);
+        background: url(<%= photo.image.send(:"size#{size}x2").url %>);
         background-size: 100%;
       }
     <% end %>

config/environments/development.rb

@@ -25,6 +25,9 @@ DanBarberPhoto::Application.configure do
   # Do not compress assets
   config.assets.compress = false
 
+  # Enable errors for Sprockets
+  config.assets.raise_production_errors = true
+
   # Expands the lines which load the assets
   config.assets.debug = true
 

config/initializers/dragonfly.rb

@@ -0,0 +1,47 @@
+require 'dragonfly'
+
+# Configure
+Dragonfly.app.configure do
+  plugin :imagemagick
+
+  protect_from_dos_attacks true
+  secret "02f4922399e3faca75b1faaa0a05bd46b524419459628110e733041af6df183b"
+
+  url_format "/media/:job/:name"
+
+  datastore :s3,
+    bucket_name: ENV['AWS_BUCKET'],
+    access_key_id: ENV['AWS_KEY'],
+    secret_access_key: ENV['AWS_SECRET'],
+    region: 'eu-west-1'
+
+  processor :preview do |content| content.process! :thumb, '600x600' end
+
+  processor :admin do |content| content.process! :thumb, '140x140#' end
+
+  processor :size17 do |content| content.process! :thumb, '476x476#' end
+  processor :size11 do |content| content.process! :thumb, '308x308#' end
+  processor :size8 do |content| content.process! :thumb, '224x224#' end
+  processor :size5 do |content| content.process! :thumb, '140x140#' end
+  processor :size3 do |content| content.process! :thumb, '84x84#' end
+  processor :size2 do |content| content.process! :thumb, '56x56#' end
+
+  processor :size17x2 do |content| content.process! :thumb, '952x952#' end
+  processor :size11x2 do |content| content.process! :thumb, '616x616#' end
+  processor :size8x2 do |content| content.process! :thumb, '448x448#' end
+  processor :size5x2 do |content| content.process! :thumb, '280x280#' end
+  processor :size3x2 do |content| content.process! :thumb, '168x168#' end
+  processor :size2x2 do |content| content.process! :thumb, '112x112#' end
+end
+
+# Logger
+Dragonfly.logger = Rails.logger
+
+# Mount as middleware
+Rails.application.middleware.use Dragonfly::Middleware
+
+# Add model functionality
+if defined?(ActiveRecord::Base)
+  ActiveRecord::Base.extend Dragonfly::Model
+  ActiveRecord::Base.extend Dragonfly::Model::Validations
+end

db/migrate/20140307120615_add_dragonfly_image_to_photos.rb

@@ -0,0 +1,6 @@
+class AddDragonflyImageToPhotos < ActiveRecord::Migration
+  def change
+    add_column :photos, :image_uid, :string
+    add_column :photos, :image_name, :string
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20130522071132) do
+ActiveRecord::Schema.define(version: 20140307120615) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -81,6 +81,8 @@ ActiveRecord::Schema.define(version: 20130522071132) do
     t.boolean  "enabled",            default: true
     t.datetime "taken_at"
     t.integer  "views",              default: 0
+    t.string   "image_uid"
+    t.string   "image_name"
   end
 
   create_table "sessions", force: true do |t|