user_params.rb

class AddUserParams < OpenStruct

  include DataMapper::Validations

  validates_with_method :has_password?
  validates_with_method :proper_user_params?

  def [](key)
    self.send(key)
  end

  def sanitize!
    valid?
    self
  end

private

  def has_password?
    set_default_password if self[:user][:password].blank?
  end


  def set_default_password
    self[:user][:password] = self[:user][:password_confirmation] = Devise.friendly_token.first(6)
  end

end