What's new in Rails 5.0. You can plan a move
The release of Rails 5.0 is scheduled for March 16, it's time to find out what is new and tasty in the new version of the rails (except for the new logo and design of their official website, I mean).
Initially, the release of Rails 5.0 was scheduled for spring 2015 and shifted many times, most recently from February 23 to March 16, 2016 . That is, perhaps this is not the last postponement. Nevertheless, Rails 5.0 currently has beta3 status and works on Basecamp production.
The current version of turbolinks updates the entire page contents via ajax without re-accessing static css, js, etc. files. The new version allows you to selectively change the contents of individual parts of the web page (through partials), and this can be done at the initiative of the server.
Websockets support is finally implemented, now you can do full-fledged single page applications without dancing with a tambourine. Channels, subscribers to them on the client side, and so on. Very comfortably.
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Wonderful video tutorial on using Action Cable - web-based chat on Rails without refreshing the page.
Now it is possible to make an application without HTML and JS parts by default - much faster and easier.
An application is created that is immediately configured to work with JSON, not HTML.
Added app / assets / config / manifest.js file to manage precompilation of static files.
Its location and format (js or yml) are also discussed, of course, with the final release it will be clear.
It is actually a lot, like a lot and small changes, but I liked these few:
They promise a 20-30% increase in performance. As I understand it, mainly due to the massive use of frozen strings (and bulk code optimization, of course).
http://blog.michelada.io/whats-new-in-rails-5
https://medium.com/evil-martians/the-rails-5-post-9c76dbac8fc#.9p0fpry5o
The newest video podcast about changes (with examples)
Initially, the release of Rails 5.0 was scheduled for spring 2015 and shifted many times, most recently from February 23 to March 16, 2016 . That is, perhaps this is not the last postponement. Nevertheless, Rails 5.0 currently has beta3 status and works on Basecamp production.
First formal changes
- Only ruby 2.2.2+ is supported.
- Webrick web server replaced by Puma with 16 default threads
- All rake commands are replaced by rails, for example:
rails db:migraterails db:migrate
And big pieces of functionality
Turbolinks 5
The current version of turbolinks updates the entire page contents via ajax without re-accessing static css, js, etc. files. The new version allows you to selectively change the contents of individual parts of the web page (through partials), and this can be done at the initiative of the server.
Action Cable
Websockets support is finally implemented, now you can do full-fledged single page applications without dancing with a tambourine. Channels, subscribers to them on the client side, and so on. Very comfortably.
')
Wonderful video tutorial on using Action Cable - web-based chat on Rails without refreshing the page.
API mode
Now it is possible to make an application without HTML and JS parts by default - much faster and easier.
rails new backend --api
An application is created that is immediately configured to work with JSON, not HTML.
Sprockets 4
Added app / assets / config / manifest.js file to manage precompilation of static files.
// JS and CSS bundles
//
//= link_directory ../javascripts .js
//= link_directory ../stylesheets .css
// Images and fonts so that views can link to them
//
//= link_tree ../fonts
//= link_tree ../images
Its location and format (js or yml) are also discussed, of course, with the final release it will be clear.
A little sugar
It is actually a lot, like a lot and small changes, but I liked these few:
paramsin the controller is no longer a hash, but an object- Now you can write like this:
User.where(users[:name].eq('bob').or(users[:age].lt(25))) - Small Integer Methods # positive? and Integer # negative?
- Objects with a belongs_to relation should now have a parent by default, otherwise it will be exception
Result
They promise a 20-30% increase in performance. As I understand it, mainly due to the massive use of frozen strings (and bulk code optimization, of course).
Install the latest beta
git clone --depth 1 http://github.com/rails/rails cd rails bundle railties/exe/rails new --edge appname cd appname bundle bundle exec rails s Read
http://blog.michelada.io/whats-new-in-rails-5
https://medium.com/evil-martians/the-rails-5-post-9c76dbac8fc#.9p0fpry5o
The newest video podcast about changes (with examples)
Source: https://habr.com/ru/post/278969/
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