Migration to extract photos from db to file_system. Closes ifunam#3

db/migrate/20111026154416_extract_photos_from_people_to_file_system.rb

@@ -0,0 +1,28 @@
+class ExtractPhotosFromPeopleToFileSystem < ActiveRecord::Migration
+  def self.up
+    base_path = Rails.root.to_s + '/tmp'
+    Person.where("photo IS NOT NULL AND photo_content_type IS NOT NULL").all.each do |record|
+      user_path = File.join(base_path, 'image/file', record.id.to_s)
+      unless File.exist? user_path
+        puts "Creating directory: #{user_path}"
+        system "mkdir -p #{user_path}"
+      end
+      original_photo = File.join(user_path, "#{record.user.login}.#{record.photo_content_type}")
+      puts "Creating file: #{original_photo}"
+
+      File.open(original_photo, 'w') do |f|
+        f.write record.photo.force_encoding('utf-8')
+      end
+
+      puts "Uploading file: #{original_photo}"
+      record.image = Image.new(:file => File.open(original_photo))
+      record.save
+
+      puts "Deleting file: #{original_photo}"
+      File.delete original_photo
+    end
+  end
+
+  def self.down
+  end
+end