You don't need to set up the database connection in the base class. All you need to do is make sure that the
connection routine for your base class is called before you attempt to
create any objects that have a database existance.
That means your script is free to do however much processing it needs to do before you set up the connection.
Like this:
use Music::DBI;
use Music::Artist;
yadda(); yadda(); yadda(); # where yadda does not touch the database
Music::DBI->connection('dbi:mysql:$dbname,$user,$pass);
$art=Music::Artist->create(.....) # etc
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