class Person
  
  include DataMapper::Resource
  extend ConstraintSupport
  
  # properties
  
  property :id,   Serial
  property :name, String, :nullable => false
  
  # associations
  
  has 1, :profile,
    constraint_options(:destroy)

  # has 1, :address,
  #   :through => :profile

  has n, :project_memberships,
    constraint_options(:destroy)

  has n, :projects,
    :through => :project_memberships

  # has n, :tasks,
  #   :through => :projects
  
end