class CuracaoIdNumberValidator

def validate_each(record, attribute, value)
  if value =~ /^[0-9]{10}$/
    year  = value[0..3].to_i
    month = value[4..5].to_i
    day   = value[6..7].to_i
    number= value[8..9].to_i
    begin
      DateTime.civil(year, month, day)
    rescue ArgumentError
      record.errors.add(attribute.to_sym, options[:message] || "not a valid date" )
    end
  else
    record.errors.add(attribute.to_sym, options[:message] || "is not a number" )
  end
end