gistfile1.rb

# user.rb

class User

  include DataMapper::Resource
  # has_and_belongs_to_many :groups                                                                                                                   
  has n, :groups, :through => Resource
  has n, :links

  property :id,         Serial
  property :email,      String,        :required => true, :length => 500
  property :identifier, String,        :required => true, :length => 500
  property :username,   String,        :required => true, :length => 500
  property :nickname,   String,        :required => true, :length => 500
  property :photo,      String,        :required => true, :length => 500
  timestamps :at
end




# group.rb

class Group

  has n, :links
  has n, :users, :through => Resource

  include DataMapper::Resource

  property :id,         Serial
  property :name,       String,        :required => true, :length => 500
  property :user_id,    Integer,       :required => true
  timestamps :at
end