gistfile1.rb

class Client < ActiveRecord::Base
  has_many :client_companies, :dependent => :destroy
  has_many :contracts       , :dependent => :destroy
    
  accepts_nested_attributes_for :client_companies , :allow_destroy => true
end

class ClientCompany < ActiveRecord::Base
  belongs_to :client
  
  has_many :client_company_addresses, :dependent => :destroy
  has_many :client_company_contacts , :dependent => :destroy
  has_many :client_company_employees, :dependent => :destroy
  has_many :contracts               , :dependent => :destroy
    
  accepts_nested_attributes_for :client_company_addresses , :allow_destroy => true
  accepts_nested_attributes_for :client_company_contacts  , :allow_destroy => true
  accepts_nested_attributes_for :client_company_employees , :allow_destroy => true
end

class ClientCompanyAddress < ActiveRecord::Base  
  belongs_to :client_company
end

class ClientCompanyContact < ActiveRecord::Base
  belongs_to :client_company
end

class ClientCompanyEmployee < ActiveRecord::Base  
  belongs_to :client_company
end