Rails - Reload Classes

setting.rb

class Setting < ActiveRecord::Base

  validates :name, :value, presence: true
  validates :name, uniqueness: true

  after_update :reload_classes

  #..

  private
  # reload_classes is a hack way around loading settings into FINALS
  def reload_classes
    klasses = [:User, :Group]

    # unload classes
    Object.class_eval do
      klasses.each do |klass|
        remove_const klass.to_s if const_defined? klass.to_s
      end
    end

    # reload classes
    klasses.each do |klass|
      load "#{klass.to_s.underscore}.rb"
    end
  end
end