activerecord-tenanted

https://github.com/basecamp/activerecord-tenanted

Enable a Rails application to have separate databases for each tenant. This gem primarily extends Active Record, creating a new connection pool for each tenant and using horizontal sharding to swap between them. It also provides integrations for middleware tenant selection, Action View Caching, Active Job, Action Cable, Active Storage, Action Mailbox, and Action Text, with support and documentation for Solid Cache, Solid Queue, Solid Cable, and Turbo Rails.