Convert serialized yaml from syck to psych

serialized_encoding.rake

require 'yaml'

# original idea comes from http://darwinweb.net/articles/convert-syck-to-psych-yaml-format
namespace :encoding do
  desc 'convert serialized Content data from syck yaml serializations to psych'
  task :psych => :environment do
    content_id = ENV['content_id']

    if content_id
      convert_data Content.find(content_id)
    else
      Content.all.each do |content|
        convert_data(content)
      end
    end

    puts "Done."
  end
end

def convert_data(content)
  use_syck
  hash = content.data
  use_psych
  content.update_attributes(data: hash) ? print(".") : print("F(#{content.id})")
end

def use_syck
  YAML::ENGINE.yamler = 'syck'
  raise "Oops! Something went horribly wrong." unless YAML == Syck
end

def use_psych
  YAML::ENGINE.yamler = 'psych'
  raise "Oops! Something went horribly wrong." unless YAML == Psych
end