<?php
class Code extends Dataobject {

       public static $db = array(
           'Sequence' => 'Varchar()'
       );
       public static $has_one = array(
           'Profile' => 'Profile',
       );
}


class Profile extends DataObject {

    public static $has_one = array(
        'Code' => 'Code',
        'User' => 'User'
    );
}



class User extends Member {
    private static $db = array(
        "Age" => "Int",
        "Address" => "Text",
    );

    public static $has_one = array(
        'Profile' => 'Int'
    );
}