Combining multiple Active_Model_Serializers in one output

gistfile1.rb

class PersonSerializer < ActiveModel::Serializer
  attributes :first_name, :last_name

  def attributes
    super.merge(AddressSerializer.new(object.address).serializable_hash)
  end
end
# Given a model Person with an association has_one Address
# The example above will serialize to:
# {
#  "first_name" : "tiemen",
#  "last_name"  : "Waterreus",
#  "streetname" : "Some Street",
#  "zipcode"    : "12345",
#  "etc"        : "etc"
#  }
# where the streetname, zipcode, etc fields are from the AddressSerializer are combined with the results from the PersonSerializer.