If you are on Rails 4.0 it might be time to upgrade, but that said you probably can manually install Hyperstack on Rails 4.0 and get it working.
hyperstack:install:skip-webpack
when installing Hyperstack.Why don't we support NoSql databases? The biggest reasons are security and effeciency. Hyperstack access-policies are based on known table names and attributes and after-commit hooks. Keep in mind that modern DBs support the json and jsonb attribute types allowing you to add arbitrary json based data to your database.
Application
as this will conflict with all sorts of things in Rails and Hyperstack.The -T option will skip adding minitest directories as Hyperstack prefers RSpec. However if you have an existing app with minitest that is okay too.