Hacker News Reader

Unfortunately, you can’t use actual-Rails in Crystal (it’s written in Ruby which is similar but not exactly the same).

But there are Rails-like frameworks you can use in Crystal that are just as much fun (though understandably less mature).

Check out Amber, Lucky, and Kemal to give you an idea of what’s out there.

I would definitely recommend amber. It's probably the most rails-like, and is more mature than other solutions at this point (kemal is more like sinatra, though it is obviously more mature being rather ancient by crystal standards)

Lucky uses type safety extensively preventing a lot of bugs. My team really enjoys working with it. You should definitely check it out.

https://luckyframework.org

While you can't use Rails, there are frameworks that I have heard are "similar", such as https://luckyframework.org/.

Disclaimer: I haven't used it, just read a bit about it.

You can't use rails with crystal, the keyword is "rails-like".