Rails 3.0: RSpec 2 + Machinist + ActiveRecord

RSpec 2 usually cleans up after itself if you set config.use_transactional_fixtures to true. However, if you use Machinist 2, this isn't the case. Apparently Machinist likes to keep around a cached version to speed things up. This is bad when trying to run independent tests.

To prevent this from happening, add this to config/environments/test.rb.

Machinist.configure do |config|
  config.cache_objects = false
end

References

http://blog.angelbob.com/posts/315-RSpec-not-clearing-database-when-you-use-machinist---published-rails