gistfile1.rb

class Group
  include DataMapper::Resource
  property :id, Serial
  property :group_name, String, { :required => true,
                                   :unique => true,
                                   :messages => { :is_unique => "League name is taken. Please choose another." }
                                  }

  property :password, BCryptHash, :required => true
  validates_confirmation_of :password

  attr_accessor :password_confirmation
  validates_length_of :password_confirmation, :min => 6, if: :new_group

  def new_group
    self.new? || self.dirty?
  end


  has n, :users

end