如何在Rails 4.2应用程序中使用订阅计划类型设置ActiveRecord限制?

I have a multi-tenant Rails 4.2 app using Devise for Authentication. I have setup subscription plans as follows: Individual{Monthly & Yearly}, Business{Monthly & Yearly}. The Individual plan has a limit of 5 users and 5 plans. The Business plan has unlimited users and plans. I have a multi-tenant Rails 4.2 app using Devis