NAME DBIx::Class::DigestColumns - Automatic digest columns SYNOPSIS In your DBIx::Class table class: __PACKAGE__->load_components(qw/DigestColumns ... Core/); #automatically generate a method "check_password" in result class __PACKAGE__->add_columns( 'password' => { data_type => 'char', size => 32, digest_check_method => 'check_password', } __PACKAGE__->digestcolumns( columns => [qw/ password /], algorithm => 'MD5', encoding => 'base64', dirty => 1, 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_dirty(1); __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'); Options added to add_column digest_check_method => $method_name By using the digest_check_method attribute when you declare a column you can create a check method for that column. The check method accepts a plain text string, performs the correct digest on it and returns a boolean value indicating whether this method matches the currently_stored value. $row->password('old_password'); $row->update; $row->password('new_password'); $row->check_password('new_password'); #returns true $row->check_password('old_password'); #returns false $row->update; METHODS digestcolumns __PACKAGE__->digestcolumns( columns => [qw/ password /], algorithm => $algorithm', encoding => $encoding, dirty => 1, auto => 1, ); Calls "digest_columns", "digest_algorithm", and "digest_encoding" and "digest_auto" if the corresponding argument is defined. register_column Override the original register_column to handle the creation of check methods. 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". _get_digest_string $value Handles the actual encoding of column values into digests. When given a $value it will return the digest string for that value. This is the method used by "_digest_column_values" So you can use it to create an identical digest if you need one for comparison (e.g. password authentication). _digest_column_values Go through the columns and digest the values that need it. This method is called by insert and update when automatic digests are turned on. If dirty is enabled it will only digest the values of dirtied columns. 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. digest_dirty __PACKAGE__->digest_dirty(1); Turns on and off the limiting of automatic digests to only dirty columns. When on, only columns that have been dirtied will have their values digested during UPDATEs and INSERTs. If auto is set to off this option does nothing. The default is for digest_dirty is to be off to mantain compatibility with older versions of this module. EXTENDED METHODS The following DBIx::Class::Row methods are extended by this module:- insert update SEE ALSO DBIx::Class, Digest AUTHOR Tom Kirkpatrick (tkp) With contributions from Guillermo Roditi (groditi) and Marc Mims LICENSE You may distribute this code under the same terms as Perl itself.