NAME

DBIx::Class::DigestColumns - Automatic digest columns

SYNOPSIS

In your DBIx::Class table class:

  __PACKAGE__->load_components(qw/DigestColumns ... Core/);

  __PACKAGE__->digestcolumns(
      columns   => [qw/ password /],
      algorithm => 'MD5',
      encoding  => 'base64',
      auto      => 1,
  );

Note: The component needs to be loaded before Core.

Alternatively you could call each method individually

  __PACKAGE__->digest_columns(qw/ password /);
  __PACKAGE__->digest_algorithm('MD5');
  __PACKAGE__->digest_encoding('base64');
  __PACKAGE__->digest_auto(1);

DESCRIPTION

This DBIx::Class component can be used to automatically insert a message digest of selected columns. By default DigestColumns will use Digest::MD5 to insert a 128-bit hexadecimal message digest of the column value.

The length of the inserted string will be 32 and it will only contain characters from this set: '0'..'9' and 'a'..'f'.

If you would like to use a specific digest module to create your message digest, you can set "digest_algorithm":

  __PACKAGE__->digest_algorithm('SHA-1');

METHODS

digestcolumns

  __PACKAGE__->digestcolumns(
      columns   => [qw/ password /],
      algorithm => $algorithm',
      encoding  => $encoding,
      auto      => 1,
  );

Calls "digest_columns", "digest_algorithm", and "digest_encoding" and "digest_auto" if the corresponding argument is defined.

digest_columns

Takes a list of columns to be convert to a message digest during insert.

  __PACKAGE__->digest_columns(qw/ password /);

digest_algorithm

Takes the name of a digest algorithm to be used to calculate the message digest.

  __PACKAGE__->digest_algorithm('SHA-1');

If a suitible digest module could not be loaded an exception will be thrown.

Supported digest algorithms are:

  MD5
  MD4
  MD2
  SHA-1
  SHA-256
  SHA-384
  SHA-512
  CRC-16
  CRC-32
  CRC-CCITT
  HMAC-SHA-1
  HMAC-MD5
  Whirlpool
  Adler-32

digest_algorithm defaults to MD5.

digest_encoding

Selects the encoding to use for the message digest.

  __PACKAGE__->digest_encoding('base64');

Possilbe encoding schemes are:

  binary
  hex
  base64

digest_encoding defaults to hex.

digest_auto

  __PACKAGE__->digest_auto(1);

Turns on and off automatic digest columns. When on, this feature makes all UPDATEs and INSERTs automatically insert a message digest of selected columns.

The default is for digest_auto is to be on.