Class::DBI::Cascade::None - Do nothing upon deletion This is a Cascading Delete strategy that will do nothing, leaving orphaned records behind. It is the base class for most ofther Cascade strategies, and so provides several important methods:

new
my $strategy = Cascade::Class->new($Relationship); This must be instantiated with a Class::DBI::Relationship object.

foreign_for
my $iterator = $strategy->foreign_for($obj); This will return all the objects which are foreign to $obj across the relationship. It's a normal Class::DBI search you can get the results either as a list or as an iterator.

cascade
$strategy->cascade($obj); Cascade across the related objects to $obj. Creating a Cascade strategy should be fairly simple. You usually just need to inherit from here, and then supply a cascade() method that does the required thing with the results from foreign_for(). So, for example, Cascade::Delete is implemented simply as: package Class::DBI::Cascade::Delete; use base 'Class::DBI::Cascade::None'; sub cascade { my ($self, $obj) = @_; $self->foreign_for($obj)->delete_all; }