Ruby on Rails 5.1.3RC1 released

Finally, new version of Ruby on Rails framework has been released
21 July 2017   1117
Ruby on Rails

Framework written in the Ruby programming language

Great news for RoR coders. New 5.1.3 release candidate 1 version has been released.


List of changes for every gem:

  • Active Record:
    • Relation#joins is no longer affected by the target model's current_scope, with the exception of unscoped.
    • Previously, when building records using a has_many :through association, if the child records were deleted before the parent was saved, they would still be persisted. Now, if child records are deleted before the parent is saved on a has_many :through association, the child records will not be persisted.
  • 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.
    • Load environment file in dbconsole command.
    • Allow mounting the same engine several times in different locations.

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.


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

$ shasum -a 256 *-5.1.3.rc1.gem
3716fe810ac09651160af680e0622dba606eadc3532dc6100a09bc3dc46d8a79  actioncable-5.1.3.rc1.gem
9e734dcdb918f269bc027e31430648a58c205842b99c4990d19f33af41862027  actionmailer-5.1.3.rc1.gem
6f3739bea472a54a27b3982ea246028d4277580e2ff98c6343e07d95d54b29ad  actionpack-5.1.3.rc1.gem
482286af2d2146f6208e757fa29337dc73f9237c240bca753485992cf906bdb5  actionview-5.1.3.rc1.gem
2356ecbc1f1393a1577031894074d333fdc6d27e4ab9de796d2b97fff8676b8b  activejob-5.1.3.rc1.gem
f6ade74444578944fc3b8e376c4b050dda63bb7145abec4777dcb16867b42d30  activemodel-5.1.3.rc1.gem
72a886347747b61578a2aac1b34715042cb8f67fe43d8e53a2290220d08b8a3c  activerecord-5.1.3.rc1.gem
9220885a9d919430fa08cf72baf922000f7c36266d8f711498b7a6fb711eab2d  activesupport-5.1.3.rc1.gem
a06eded7f5e2bf1d6ecc69589062966bb701ccb8896d5aac5a6171ff38d037d4  rails-5.1.3.rc1.gem
727e65bc8c8fd359997bd1442c152f8628ddc318f68c9fba1ca603dda2db7766  railties-5.1.3.rc1.gem


Ruby Meditation #22 in Dnipro

Meditation will be held on May 19, at Parle, Troitska St, 21 g, Dnipro
27 April 2018   554

On Ruby Meditation #22 you will hear about helpful tools and gems for building Slack apps, examples how to build functional architecture with ruby, which place takes Ruby on Rails among alternatives in 2018 and much more.

Come and get your portion of good mood, knowledge, professional communication and tasty lunch :)

Share your positive experience and best practices on this Ruby Meditation #22. If you have any work issues you cannot solve, our community will gladly help you to find the best way out in live discussion at Lightning talks session. You may also try yourself as a speaker with a short 5-10 mins talk. Fill in this form.


Anna Shcherbinina

Topic: "Docker + GPU. Not about mining."

Anna Shcherbinina
Anna Shcherbinina

Just before Christmas we launched a new body-measurement feature for our project. A person goes into the 3D booth, gets scanned, and the body-measurements are calculated with the 3D scan data. We couldn't avoid using a GPU with these calculations.

How to install this branch of processing into our elegant scaling pipeline? When you're dealing with 3D scans you should remember two things: it's expensive and time-consuming. By the way, its workload fluctuates throughout the days. The easiest solution for us was to use Docker.

This speech is not about mining, but the most helpful articles for us were ones such as "Building your own mining farm". That's because we use quite a similar infrastructure.

GPU, Docker, scaling. What we achieved, where we failed, and what it became of it in the end is all included in my speech.

Anna Shcherbinina

Head of Web, Artec3D, Luxembourg

Kirill Shevchenko

Topic: "Building Slack apps with Ruby."

Kirill Shevchenko
Kirill Shevchenko

Overview of Slack APIs. Their features, restrictions, and bottlenecks. Which API is right for you? Helpful tools and gems for building Slack apps.

Kirill Shevchenko

Ruby/JS Developer

Valentine Ostakh

Topic: "Functional objects in Ruby: new horizons "

Valentine Ostakh
Valentine Ostakh

Overview of functional programming concepts.  What is functional objects. Examples how to build functional architecture with ruby.

Valentine Ostakh

Ruby/JS Developer

Leonid Shevtsov

Topic: "A polyglot's view of Ruby on Rails"

Leonid Shevtsov
Leonid Shevtsov

Nowadays, it's hip to switch from Rails to other languages and frameworks. Leonid, too, has abandoned Rails, played the field a bit, and has come around to occasionally but consistently picking Rails for some projects. What's the modern reason to use Rails? What are the strengths of Ruby and Rails and how to build upon them? When you should really jump to some other platform? Let's answer these questions in a true Ruby meditation.

Leonid Shevtsov

Systems Architect

Oleksii Dashkevych

Topic: "Project development - preparing hell dish together"

Oleksii Dashkevych
Oleksii Dashkevych

The recipe is averaged, because of many variations. We take some Ruby code and add Rails magic, Postgresql on top. Add Docker for viscosity. Then put this on AWS EBS pan and start frying. It's all roasted until burning deadlines and generously watered with bugs, serves to the customer. They start eating. Eat and whisper: “This is an awesome product!”. At the same time, he forehead is sweating. Kindly offer to fix bugs, but we refuse and put them in JIRA. Do I need to talk about what kind of feedback comes then? Tasks with such recipes, that double estimated.

Oleksii Dashkevych

Ruby/JS Developer

Thanks to the sponsors: Ruby Garage, Railsware, Aejis.

Students, who interested in ruby and have a willingness to visit Ruby Meditation, will get a discount 50% with promocode ‘student’. Please send your student ID’s scan to make your registration on the event faster.

If you are a parent of a small baby (0-3 years) on maternity leave and you want to learn more about ruby development you can get a special discount for a ticket with promo code ‘GrowWithYourKid’. Please send your document's scan or take it with you to approve your status and make your registration in the event faster.

If you have any questions or suggestions, don't hesitate to contact us via cell phone: 099 202 6308 or by email:

More details on website.

Buy a ticket