What I did was all my Objects that talk to the database, inherit from one module. That module has an 'import' method( that gets called automatically), where it will attempt to create a database handle if one does not already exists. Then I share the database handle with a dbh() method from the base class.

So this allows only my objects to have just one dbh(). without having to pass a $dbh around.

In reply to Re: question on OO design and object composition by Herkum
in thread question on OO design and object composition by Qiang

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