Ruby on Rails 5.0.5RC1 released

New release candidate of 5.0.x version of Ruby on Rails framework is out now
21 July 2017   2263
Ruby on Rails

Framework written in the Ruby programming language

Good news for RoR fans. New 5.0.5 release candidate 1 version has been released.

Changelogs

List of changes for every gem:

  • Action Pack
    • Fallback ActionController::Parameters#to_s to Hash#to_s.
  • Active Record
    • Relation#joins is no longer affected by the target model's current_scope, with the exception of unscoped.
  • Railities
    • Make Rails' test runner work better with minitest plugins.
      By demoting the Rails test runner to just another minitest plugin — and thereby not eager loading it — we can co-exist much better with other minitest plugins such as pride and minitest-focus.

As always, you can view whole list of changes at GitHub

If no regressions will be found, final release expected on Monday, 24th of July, 2017. Developers ask everyone who will face any issues, to open a GitHub issue and mention @kaspth in order to developers fix it as soon as possible. 

SHA-256

Feel free to use this checksum in order to check version of your gem:

$ shasum -a 256 *-5.0.5.rc1.gem
71ae996b0cbadc4836d8de61058870fe3d7ae275c5a3d345b851ca8b88e7c5a7  actioncable-5.0.5.rc1.gem
58fe87b9daf4dc1ddc89110e83846c0e0939fc97c8463e789785d28eddd34ee1  actionmailer-5.0.5.rc1.gem
123d468dcb3e523d1fb82367ebec2d630c6b625d1ad3d1b635bfc718c5d94624  actionpack-5.0.5.rc1.gem
117d39ee700e82903a3f0c3c242e986326acd08e7bab1059fd0afc6e58a2d19c  actionview-5.0.5.rc1.gem
99c51db0728e139a7833af9785323c967cbd474b3f9f1d20f5802628c33398f4  activejob-5.0.5.rc1.gem
9f81997461c252608451c61f5121754fb8aa36f30a1f9f6167a77826cae76be1  activemodel-5.0.5.rc1.gem
9cef200cd17925cd22055d6c5b2d2f22514f434f98983bcba0484e472f208211  activerecord-5.0.5.rc1.gem
ca8be3d1ee126f0e0b84cb9c932771cd718a524c60f2a63dccd32c33831aff74  activesupport-5.0.5.rc1.gem
0fd92b43895a1a73d639b93eec67159bed1003ce2a3f6250030b05091ae40046  rails-5.0.5.rc1.gem
3516bc7c5d3337fe5134ac0a7ec60337078817b569a56381a4f3fe737ef04546  railties-5.0.5.rc1.gem

 

Charles Nutter. How to move your Ruby project to JRuby and why

Charles Nutter works on JRuby and JVM language support at Red Hat.
03 October 2018   937

— How did you get into programming and into Ruby world?

— In 2004, I was working at a government contracting firm as a Java Enterprise Architect. I was in charge of a large mainframe conversion for the United States Department of Agriculture, which meant I spent a couple weeks a month in the Washington D.C. area. One of those trips coincided with RubyConf 2004, and since a close friend had been recommending I look at Ruby, I decided to attend. So there I was sitting in a Ruby conference without ever having learned Ruby...and I understood every piece of code, every example. I was amazed and vowed to find a way to bring Ruby into my Java world.

— Which projects are you working on now?

— My primary role is as co-lead of JRuby. This also means supporting several side projects like our native-library backend (Ruby's FFI library is maintained by us using this backend on JRuby) and our String encoding subsystem (an elaborate port of the logic from CRuby). I also do much of the outreach to the community and try to make sure our users are getting their issues addressed. There's always plenty to work on!

— Which one would have the biggest general impact from you opinion?

— I like to think that JRuby, while not the most popular JVM language, has at least helped to change the JVM platform. Because of our collaborations with Sun Microsystems, Oracle, and others, we have solid dynamic language support at the JVM level along with many other projects to support alternative languages. The JVM today is a much more hospitable home for non-Java languages than it used to be, and I hope we've played some small part in that change.

— Which languages are you writing on in your everyday life? Which one do you like most? Why?

— Most days I write in a mix of Ruby and Java, since JRuby is implemented using both. I like both languages for different tasks. Ruby is a better language for building applications that need to evolve and adapt quickly. Java is a great language for writing high-speed, reliable libraries and services. JRuby gives you the best of both worlds!

— Do you like to program in Java?

— I do, especially with all the language improvements that have been added recently, like lambdas (closures or blocks in Ruby) and the new "var" syntax for declaring local variables when the static type is unambiguous.

— What do you think about Rust?

— Rust is a great language! I did a lot of C++ development in my college years, and I can tell you right now if I'd had Rust available then I would have used it. I'm especially jealous of the static-typed ownership model, which helps avoid thread-safety issues like races and data corruption. I hope to see other languages adopt this pattern in the future.

— What do you think about the Ruby language perspective? Is it or its community dying?

— After all these years working on JRuby, I do still love Ruby syntax and the Ruby way of doing things. However I worry that the language is held back too much by limitations of its primary runtime. JRuby has been fighting to make true parallel threading a reality for Ruby developers, but still today the vast majority of Ruby services are run using multiple isolated processes, wasting tremendous amounts of CPU and memory resources. I believe this is due to the C API for writing Ruby extensions being so large and so invasive...it prevents many improvements -- including parallel threading -- from being developed. Hopefully we'll see this change some day.

— Which upcoming or not well-known features of Ruby language would rush in future?

— I look forward to strings becoming immutable-by-default, as they are in most other languages. Parallel programming would be much simpler if more of Ruby's objects supported pure-immutable or "deep freeze" semantics. It's a bit like the Rust ownership model...if you're going to be sharing an object across threads, choose the version of that object that you know can't be modified anymore. This extends to arrays, hashes, and just about every other mutable object in Ruby: we need to make it easier to lock down mutable data.

— Could you give me an advice on how to move my ancient monolithic project to JRuby? And should I?

— The first question really is whether such a move would benefit you. There's many good reasons to consider a move to JRuby:

  • Reducing CPU  and memory costs in a shared hosting environment by utilizing JRuby's true parallel threading
  • Deploying a Ruby application into a JVM-heavy environment, such as used by larger financial or government organizations
  • Needing access to libraries that only exist on the JVM, or that are more portable or scalable on the JVM than their Ruby or C equivalents
  • Getting a little performance boost out of CPU-heavy or concurrency-heavy applications.

— I would say if your application is scaling well and not costing you too much today, perhaps you don't need to make a move. But if you decide you need more out of Ruby, here's the process for migrating:

  • Do a clean bundle of your application, paying special attention to C extensions you may be using. You can also do this bundling *on* JRuby, and then deal with missing or unsupported libraries one by one.
  • For each extension, search for a JRuby equivalent. We have some pages on the JRuby wiki to help with this. Most popular libraries have JRuby versions. If no JRuby version exists, you may look for a pure-Ruby version (it might be fast enough on JRuby) or a JVM library (in Java or Scala or Clojure or whatever) that could be used as a replacement.
  • Once your bundle completes, you should have a working JRuby application! We've worked very hard on compatibility, and try to be responsive if users find new issues, but a successfully-bundled application is expected to work.

The steps beyond this involve deciding how to take advantage of your newfound power: how many threads to throw at a given server, what you're going to do with all the money you're saving, etc.

— What should nowadays students learn to become good programmers?

— When I was at university, my earliest computer science courses used the Scheme language, a Lisp-like functional language that's great for teaching the fundamentals of programming. I still recommend that serious new programmers work through at least some of the Structure and Interpretation of Computer Programs book from MIT. Beyond that, I'd say learn as many different and unusual languages as you can; they'll all give you new ideas and new ways to look at programming problems.

— How do you keep yourself motivated for programming? Have you ever been "burned-out"?

— Burn-out is a real problem in our industry, and working in open source brings with it huge amount of stress. We've all felt that way sometimes...too much work to do and not enough time to do it, missing out on time with family and friends, ignoring our own health so we can fix one more bug. These days I try to center myself by keeping up with hobbies: playing video and board games, learning to play guitar, studying foreign languages, and traveling around the world to meet new friends. There's always this nagging workaholic telling me to get back on the job, but I'm learning how to maintain the right balance.

— What do you think about Russia and what do you expect of the upcoming RubyRussia event?

— I love Russia, and my speaking trips the past few years have been some of the most rewarding of my life. This will be my fourth visit, having been to Saint-Petersburg, Moscow, and Novosibirsk (!!!) previously. I'm looking forward to returning to Moscow and meeting the RubyRussia community I've heard so much about!

Questions by Dmitry Matveyev PM at Evrone https://www.facebook.com/matveyev.d