class ActiveRecord::Base

def self.yaml_new(klass, tag, val)
  Apartment::Database.process(val['database']) do
    klass.find(val['attributes']['id'])
  end
rescue ActiveRecord::RecordNotFound
  raise Delayed::DeserializationError
end

def to_yaml_properties
  ['@attributes', '@database']    # add in database attribute for serialization
end