Add avatar.

app/models/user.rb

@@ -1,11 +1,14 @@
 class User < ActiveRecord::Base
+  dragonfly_accessor :avatar
+
   def self.find_or_create_from_auth(auth)
     user = User.find_by(provider: auth.provider, uid: auth.uid)
     if user.blank?
       user = User.create(provider: auth.provider,
                   uid: auth.uid,
                   username: auth.info.nickname,
-                  name: auth.info.name)
+                  name: auth.info.name,
+                  avatar_url: auth.info.image)
     end
     user
   end

config/initializers/dragonfly.rb

@@ -0,0 +1,27 @@
+require 'dragonfly'
+
+# Configure
+Dragonfly.app.configure do
+  plugin :imagemagick
+
+  protect_from_dos_attacks true
+  secret "0da375f9754c75707f2a3b4e0c75dffb7ec7d6bb1a4a77e8a8dcfba9037bebce"
+
+  url_format "/media/:job/:name"
+
+  datastore :file,
+    root_path: Rails.root.join('public/system/dragonfly', Rails.env),
+    server_root: Rails.root.join('public')
+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/20140324170840_add_avatar_to_user.rb

@@ -0,0 +1,5 @@
+class AddAvatarToUser < ActiveRecord::Migration
+  def change
+    add_column :users, :avatar_uid, :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: 20140324161505) do
+ActiveRecord::Schema.define(version: 20140324170840) do
 
   create_table "images", force: true do |t|
     t.integer  "user_id"
@@ -29,6 +29,7 @@ ActiveRecord::Schema.define(version: 20140324161505) do
     t.string   "uid"
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.string   "avatar_uid"
   end
 
 end