package MyApp::DBI; use base 'Class::DBI'; __PACKAGE__->connection(...); 1; package MyApp::Gallery; use base 'MyApp::DBI'; __PACKAGE__->table('galleries'); __PACKAGE__->columns(...); sub create { my ($self, $ops) = @_; my $dir = $ops->{'directory'}; if (-e $dir) { die 'directory exists'; else { mkdir $directory; $self->find_or_create($data); }; return; }; 1;