class SelfField < Field
  def strip_nil?
    true
  end
  
  def default_input_type
    nil
  end

  def validate(record, errors)
    # noop
  end

  def typecast(value, record)
    record
  end

  def untypecast(value, record)
    nil
  end

  def from_json(value, record)
    nil
  end
end

Field::TYPES['self'] = SelfField