ZGadflyDA The ZGadflyDA product provides support for Gadfly database adapter objects in the Zope environment. Using Multiple Databases with ZGadflyDA The ZGadflyDA is intended mainly for demonstration purposes. It automatically creates a 'gadfly' directory in your Zope var directory with a 'demo' subdirectory, which provides a demo database. To add or use additional databases, simply add (or link) additional directories to your 'var/gadfly' directory.