有没有书，只是还没有，但有关于这个问题的http://aac2009.confreaks.com/06-feb-2009-14-30-writing-multi-tenant-applications-in-rails-guy-naor.html

There are no books just yet, but there's an interesting talk on the subject http://aac2009.confreaks.com/06-feb-2009-14-30-writing-multi-tenant-applications-in-rails-guy-naor.html

和有可用于它的瑰宝。

https://github.com/wireframe/multitenant