fix ActivityStreams::Photo migration

db/migrate/20130717104359_migrate_activity_stream_to_status_message.rb

 class MigrateActivityStreamToStatusMessage < ActiveRecord::Migration
+  class Post < ActiveRecord::Base; self.inheritance_column = false; end
   def up
-    posts_stream_photos = Post.where(:type => 'ActivityStreams::Photo')
+    posts_stream_photos = Post.where(type: 'ActivityStreams::Photo')
     posts_stream_photos.each do |p|
-      p.update_attributes(:text => "#{p.text} ![](#{p.image_url})", :type => "StatusMessage", without_protection: true)
+      p.update_attributes({text: "#{p.text} ![](#{p.image_url})", type: "StatusMessage"}, without_protection: true)
     end
   end