Is Rails 6.1.x compatible with Ruby 3.1?

collimarco · January 7, 2022, 4:00pm

Hello,

Is there any official compatibility table between Rails versions and Ruby versions?

In particular, I have a Rails 6.1 app: should I upgrade Ruby to 3.1? Or is Rails 7 required for Ruby 3.1?

Thanks

brenogazzola · January 7, 2022, 8:09pm

I don’t think so. Even Rails 7.0 is not compatible, and you need Rails 7.0.1 for that. There was a problem with Rails::Engine being an abstract class and Ruby 3.1 breaking that. I think the 6.1.x branch has not been fixed yet.

EDIT: As mentioned by Jean Boussier below, Rails 6.1 is compatible. Also, Rails 7.0.1 is out, all stable and supported versions of Rails should now be compatible.

hfpp2012 · January 8, 2022, 1:55am

using ruby 3.0 for rails 7 is good

mzagaja · January 8, 2022, 2:41am

Crushes my dreams of updating my apps to 3.1 anytime soon but this is good to know.

byroot · January 8, 2022, 8:51pm

That problem was specific to Rails 7, 6.1 shouldn’t have that problem and shouldn’t need fixing for that.

I just gave a quick glance at the 6-1-stable branch, and I don’t think there’s really any Ruby 3.1 specific problems.

You might need to do some Gemfile workaround for some stuff that were moved from the stdlib to bundled gems but as far as I know that’s about it.

Anyway, best way to know is to upgrade ruby on a branch and run your CI (if your Ci infra supports it of course)

akaspick · January 10, 2022, 2:33am

Rails 7.0.1 is compatible with Ruby 3.1. Rails 7.0 is not.

simi · January 13, 2022, 5:04am

Latest Rails releases are compatible with Ruby 3.1. But not all common gems are compatible with Ruby 3.1 yet.

I have seen various troubles with Nokogiri (with binary gem), mail gem (really common dependency), RubyGems and Bundler itself emitting warnings… Even almost all those problems could by bandaided somehow currently, I’m waiting for Ruby 3.1.1 planned for January. I expect most common problems to be fixed at that time.

KSH-code · January 13, 2022, 6:36am

I am happy to announce that Rails 7.0.1 has been released. The focus of this release is bring support to Ruby 3.1,

koic · January 27, 2022, 4:58am

FYI, the following Gist entry summarizes Ruby 3.1 on Rails.

gist.github.com

https://gist.github.com/yahonda/2776d8d7b6ea7045359f38c10449937b

ruby31onrails.md

# Ruby 3.1 on Rails

# Actions required to use Ruby 3.1.0 with Rails
## Rails 7.0.Z
- Rails 7.0.1 is compatible with Ruby 3.1.0. 
- Rails 7.0.1 addes net-smtp, net-imap and net-pop gems as Action Mailbox and Action Mailer dependency, you do not need to add them explicitly in your application Gemfile anymore.
- thor 1.2.1 has been released. You will not see `DidYouMean::SPELL_CHECKERS.merge` deprecate warnings anymore.

## Rails 6.1.Z
- Use Rails 6.1.5 to support `database.yml` with aliases and `secrets.yml` with aliases.

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Roman_Gaufman · April 27, 2022, 10:18am

Is Rails 6 compatible with Ruby 3.1 yet?

collimarco · July 8, 2022, 1:09pm

Is someone using Ruby 3.1 with Rails 6.1 ? Did you experience any problems?

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