Rails 5.1.2.rc1 has been released

New update of Rails released
21 June 2017   1649

Great news for RoR community. New, 5.1.2rc1 version has been recently released.

Ruby

A dynamic, open source programming language, focused on simplicity and productivity
 

Ruby on Rails

Ruby on Rails (RoR) - a framework written in the Ruby programming language

Final release is expected at Monday, 26th of June, if now big issues appear. As always, developers ask you to test this release good and create issue on GiHub if any bugs will be found. 

Changelogs

List of changes for every gem:

  • Action Pack:
    • driven_by now registers poltergeist and capybara-webkit
      If driver poltergeist or capybara-webkit is set for System Tests, driven_by will register the driver and set additional options passed via :options param.
      Refer to drivers documentation to learn what options can be passed.
      by Mario Chavez

    • AEAD encrypted cookies and sessions with GCM

  • Action View:
    • Fix issues with scopes and engine on current_page? method.

      Fixes #29401.
      by Nikita Savrov

    • Generate field ids in collection_check_boxes and collection_radio_buttons.
      This makes sure that the labels are linked up with the fields.

      Fixes #29014.
      by Yuji Yaginuma

  • Active Model:
    • Fix regression in numericality validator when comparing Decimal and Float input values with more scale than the schema.
      by Bradley Priest

  • Active Record:

    • Restore previous behavior of collection proxies: their values can have methods stubbed, and they respect extension modules applied by a default scope.
      by Ryuta Kamizono

    • Loading model schema from database is now thread-safe.

      Fixes #28589.
      by Vikrant Chaudhary, David Abdemoulaie

  • Active Support:

    • Cache: Restore the options = nil argument for LocalStore#clear that was removed in 5.1.0. Restores compatibility with backends that take an options argument and use the local cache strategy.
      by Jeremy Daer

    • Fix implicit coercion calculations with scalars and durations
      Previously calculations where the scalar is first would be converted to a duration of seconds but this causes issues with dates being converted to times, e.g:

      Time.zone = "Beijing"           # => Asia/Shanghai
      date = Date.civil(2017, 5, 20)  # => Mon, 20 May 2017
      2 * 1.day                       # => 172800 seconds
      date + 2 * 1.day                # => Mon, 22 May 2017 00:00:00 CST +08:00
      

      Now the ActiveSupport::Duration::Scalar calculation methods will try to maintain the part structure of the duration where possible, e.g:

      Time.zone = "Beijing"           # => Asia/Shanghai
      date = Date.civil(2017, 5, 20)  # => Mon, 20 May 2017
      2 * 1.day                       # => 2 days
      date + 2 * 1.day                # => Mon, 22 May 2017
      

      Fixes #29160, #28970.
      by Andrew White

  • Railties:

    • Add Windows support to rails secrets:edit
      by Kasper Timm Hansen

Full changelist can be found at GitHub.

Interesting update! New features and fixes of Action View and Active Record will become handy. Will try to update my Rails as soon as possible.
 

Dima Koprov
Team Lead at Evrone

SHA-256

You can use this checksum in order to verify your gem's version:

$ shasum -a 256 *-5.1.2.rc1.gem
ae90de7d8f5d1129a162e9419b65e08870a433ed4eb067bcd44be161de394773  actioncable-5.1.2.rc1.gem
bd7b3ac7dacb1a983bf2b5dcc56255261421285ef9b5cc5d645d416a1ba42378  actionmailer-5.1.2.rc1.gem
21b097d2ea1009eaad2487b4461f20a2c76d2ea9786e2fb37dd1e87116ca3621  actionpack-5.1.2.rc1.gem
689d6580dbef9c81e43fc77185a7916ef7ca2a3d863300f6e47d8199e4bdbd1c  actionview-5.1.2.rc1.gem
dfa1afc5d701241e25282c318738a8c379fdbd9cf682725f87e1c16584bf3be6  activejob-5.1.2.rc1.gem
040c3aaa4bf7686efa0e716dc4cf077d4d5b1ef598c81f7d32e86f1f8f26817a  activemodel-5.1.2.rc1.gem
8bc8b1677051975083717c65a3ee3df612b5e9d381db9d90dc71f3484f514a0b  activerecord-5.1.2.rc1.gem
69aab1c234f1223ceedb62168df071bdb3483a00be5e186278983eb1ed636e69  activesupport-5.1.2.rc1.gem
50a14c6e4952297f0a9a510b268ea845833474dccbe1619594c0406ceab5c7fa  rails-5.1.2.rc1.gem
7c18b3a185f73740b020ecf9414ea8d5c254edddefce64e7383bd137c7626d45  railties-5.1.2.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   948

— 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