Virtus + DataMapper Validations

virtus_dm_validations_example.rb

# this uses upcoming dm-validations, it's not released yet

class User
  include Virtus
  include DataMapper::Validations

  # basic info
  attribute :email,                 String
  attribute :password,              String
  attribute :password_confirmation, String

  # contact info
  attribute :first_name, String
  attribute :last_name,  String
  attribute :zipcode,    String

  validates_presence_of :email, :password, :password_confirmation, :context => :basic_info
  validates_presence_of :first_name, :last_name, :zipcode,         :context => :contact_info
end

user = User.new
user.validate(:basic_info)
user.validate(:contact_info)