Question

Rails does not support referential integrity foreign keys. How do I manage this?

Ideally the app should not have to deal with this; the database should. Do plugins like Foreigner have shortcomings? How is this dealt with?

Answer 1

It’s a design decision for Rails ActiveRecord.

I consider stored procedures and
constraints vile and reckless
destroyers of coherence. No, Mr.
Database, you can not have my business
logic. Your procedural ambitions will
bear no fruit and you’ll have to pry
that logic from my dead, cold
object-oriented hands.

Choose a single layer of cleverness – DHH

So the answer is that referential integrity handled by the DB is not the Rails way at all.