gistfile1.rb

    def self.included(base)
      @user_models << base.name

      base.extend(ClassMethods)

      base.class_eval do

        fields do
          crypted_password          :string, :limit => 40
          salt                      :string, :limit => 40
          remember_token            :string
          remember_token_expires_at :datetime
        end

        validates_confirmation_of :password,              :if => :new_password_required?
        password_validations
        validate :validate_current_password_when_changing_password

        # Virtual attributes for setting and changing the password
        # note that :password_confirmation= is also defined by
        # validates_confirmation_of, so this line must follow any
        # validates_confirmation_of statements.
        # https://hobo.lighthouseapp.com/projects/8324-hobo/tickets/530
        attr_accessor :current_password, :password, :password_confirmation, :type => :password

        before_save :encrypt_password
        after_save :stash_current_password

        never_show *AUTHENTICATION_FIELDS

        attr_protected *AUTHENTICATION_FIELDS


      end
    end