dm-accepts_nested_attributes

require "rubygems"

require "dm-core"
require "dm-validations"
require "dm-accepts_nested_attributes"

DataMapper::Logger.new(STDOUT, :debug)  
DataMapper.setup(:default, 'sqlite3::memory:')
  
class Person
  include DataMapper::Resource
  property :id,   Serial
  property :name, String
  has 1, :profile
  has n, :project_memberships
  has n, :projects, :through => :project_memberships

  accepts_nested_attributes_for :profile
  accepts_nested_attributes_for :projects

  # adds the following instance methods
  # #profile_attributes=
  # #profile_attributes
  # #projects_attributes=
  # #projects_attributes
end

class Profile
  include DataMapper::Resource
  property :id,      Serial
  property :person_id, Integer
  belongs_to :person

  accepts_nested_attributes_for :person

  # adds the following instance methods
  # #person_attributes=
  # #person_attributes
end

class Project
  include DataMapper::Resource
  property :id, Serial
  has n, :tasks
  has n, :project_memberships
  has n, :people, :through => :project_memberships

  accepts_nested_attributes_for :tasks
  accepts_nested_attributes_for :people
  
  # adds the following instance methods
  # #tasks_attributes=
  # #tasks_attributes
  # #people_attributes=
  # #people_attributes
end

class ProjectMembership
  include DataMapper::Resource
  property :id,         Serial
  property :person_id,  Integer
  property :project_id, Integer
  belongs_to :person
  belongs_to :project
end

class Task
  include DataMapper::Resource
  property :id,         Serial
  property :project_id, Integer
  belongs_to :project
end

DataMapper.auto_migrate!