Seed Fu-ndo adds undo functionality to Seed Fu. While Seed Fu solves the problem for inserting and maintaining seed data in a database, Seed Fu-ndo adds the possiblity to remove this data again.
Once you have your Seed Fu fixtures set up and seeded into the database, just run
rake db:unseed_fu
To unseed your data programmatically, there is an equivalent SeedFuNdo class
SeedFuNdo.unseed(fixture_paths, filter)
The process is fairly simple: The Seed Fu fixtures are processed as usual but without actually inserting any data. Instead, the to-be-seeded records are simply recorded. When all files are processed, the recorded entries are destroyed in reverse order from the database.