We've been using rails_admin for a project for a year. It's good, but it would be preferable to have an admin interface that ran in a totally separate process from the main Rails app and from a completely independent code base. rails_admin has so many dependencies that upgrading it along with the main Rails app has proven brittle.
So the functionality we would need is just basic crud for the database tables, with a little bit of magic to make editing associations easier.
Are there any light-weight solutions out there for this? Bonus points for being lightweight & Sinatra-based rather than Rails-based.