I made a revised version of a rake task that I have used quite often, for unloading existing DB tables into fixture data and thought I would share. This rake task is the in correct name space and adds a "rake db:fixtures:unload" command to your rails project when you put this in "lib/tasks/foo.rake". It can take an optional TABLES variable or if none is present the whole array of DB tables are converted. I find this rake task helpful when dealing with LARGE databases.