Ruby/ActiveRecord/One to Many

=begin
drop database Contact;
create database Contact;
use Contact;
CREATE TABLE Employee (
   id  int unsigned not null auto_increment primary key,
   Name VARCHAR(50),
   Phone VARCHAR(15),
   departmentId int
);
 
CREATE TABLE Department(
   id    int unsigned not null auto_increment primary key,
   Name VARCHAR(50),
   Phone VARCHAR(15)
 
);
 
=end
require "rubygems"
require "activerecord"
ActiveRecord::Base.establish_connection(
  :adapter => "mysql",
  :host => "localhost",
  :username => "root",
  :database => "Contact")
class Employee < ActiveRecord::Base
   set_table_name "employee"
   belongs_to :department
end
class Department < ActiveRecord::Base
   set_table_name "department"
   has_many :children, :class_name => "Employee", :foreign_key => :departmentId
end
 
account = Employee.new
account.Name = "AAA"
account.save
department = Department.find_or_create_by_Name("B")
department.children << account
department.save

=begin
drop database Contact;
create database Contact;
use Contact;
CREATE TABLE Employee (
   id  int unsigned not null auto_increment primary key,
   Name VARCHAR(50),
   Phone VARCHAR(15),
   departmentId int
);
 
CREATE TABLE Department(
   id    int unsigned not null auto_increment primary key,
   Name VARCHAR(50),
   Phone VARCHAR(15)
 
);
 
=end
require "rubygems"
require "activerecord"
ActiveRecord::Base.establish_connection(
  :adapter => "mysql",
  :host => "localhost",
  :username => "root",
  :database => "Contact")
class Employee < ActiveRecord::Base
   set_table_name "employee"
   belongs_to :department
end
class Department < ActiveRecord::Base
   set_table_name "department"
end
account = Employee.new
account.Name = "AAA"
account.save
account = Employee.find_by_Name("AAA")
puts account.destroy