mechanicles · December 7, 2011 17:37 · Jun 8, 2011
diff --git a/gistfile1.rb b/gistfile1.rb
@@ -0,0 +1,28 @@
+# autoload concerns
+module YourApp
+  class Application < Rails::Application
+    config.autoload_paths += %W(
+      #{config.root}/app/controllers/concerns
+      #{config.root}/app/models/concerns
+    )
+  end
+end
+
+# app/models/concerns/trashable.rb
+module Trashable
+  extend ActiveSupport::Concern
+
+  included do
+    default_scope   where(trashed: false)
+    scope :trashed, where(trashed: true)
+  end
+
+  def trash
+    update_attribute :trashed, true
+  end
+end
+
+# app/models/message.rb
+class Message < ActiveRecord::Base
+  include Trashable, Subscribable, Commentable, Eventable
+end