SmarterChanged

smarter_changed.rb

module SmarterChanged
  extend ActiveSupport::Concern

  def changed?
    cache = Thread.current[:smarter_changed]
    wipe = false

    if cache.nil?
      cache = Thread.current[:smarter_changed] = {}
      wipe = true
    end

    begin
      key = _id.to_s
      return cache[key] if cache.has_key?(key)
      cache[key] = super
    ensure
      Thread.current[:smarter_changed] = nil if wipe
    end
  end
end