enables paperclip in theory.

config/boot.rb

@@ -34,6 +34,8 @@
 # Add your before (RE)load hooks here
 #
 Padrino.before_load do
+  ActiveRecord::Base.send(:include, Paperclip::Glue)
+  Paperclip.options[:logger] = Padrino.logger
 end
 
 ##

db/migrate/20120627232445_add_attachment_to_songs.rb

@@ -0,0 +1,5 @@
+class AddAttachmentToSongs < ActiveRecord::Migration
+  def change
+    add_attachment :songs, :file
+  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 => 20120627231645) do
+ActiveRecord::Schema.define(:version => 20120627232445) do
 
   create_table "playlists", :force => true do |t|
     t.string   "name"
@@ -28,8 +28,12 @@
     t.string   "description"
     t.integer  "playlist_id"
     t.integer  "length"
-    t.datetime "created_at",  :null => false
-    t.datetime "updated_at",  :null => false
+    t.datetime "created_at",        :null => false
+    t.datetime "updated_at",        :null => false
+    t.string   "file_file_name"
+    t.string   "file_content_type"
+    t.integer  "file_file_size"
+    t.datetime "file_updated_at"
   end
 
 end

models/song.rb

@@ -0,0 +1,4 @@
+class Song < ActiveRecord::Base
+  belongs_to :playlist
+  has_attached_file :file
+end