NAME¶
KiokuDB::Role::Upgrade::Data - Classes that provide their own upgrade routine.
SYNOPSIS¶
with qw(KiokuDB::Role::Upgrade::Data);
sub kiokudb_upgrade_data {
my ( $class, %args ) = @_;
# convert the data from the old version of the class to the new version
# as necessary
$args{entry}->derive(
class_version => our $VERSION,
...
);
}
DESCRIPTION¶
This class allows you to take control the data conversion process completely
(there is only one handler per class, not one handler per version with this
approach).
See KiokuDB::Role::Upgrade::Handlers::Table for a more DWIM approach, and
KiokuDB::TypeMap::Entry::MOP for more details.