rails 5 – amsterdam.rb – uberous

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Rails 5What's new?

Rails 5 by Jeroen Visser 1

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I'm Jeroen Visser

• CTO @ Uberous

• github.com/jeroenvisser101

• twiFer.com/jeroenvisser101

• I blog at jrnv.nl

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That's me

Photo by Tim Gouw

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I like beta soHware

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Rails 5

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Current state

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Race condiJon →

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Current state

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New in Rails 5

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Visual idenJty

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New home pagehFps://github.com/rails/rails/pull/23237

by @gsamokovarov

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AcJon Cable

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What is AcJon Cable?

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Live

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How does it work?

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How does it work?

Channel Imagine this as an IRC channel

Users can subscribe to it

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Broadcast Imagine this as a message sent

on a channel

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class NotificationChannel < ApplicationCable::Channel

end

def subscribed stream_from "some_channel" end

def unsubscribed # Any cleanup needed when channel is unsubscribed end

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ActionCable.server.broadcast( "some_channel", some_data: "some string")

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def subscribed stream_for current_user end

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NotificationChannel.broadcast_to( @user, @notification )

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MulJplexing

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image from wikimedia

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Front-end setup

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# app/assets/javascripts/cable.coffee #= require_self@App ||= {}App.cable = ActionCable.createConsumer()

#= require action_cable

#= require_tree ./channels

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# .../javascripts/channels/notification_channel.coffee App.cable.subscriptions.create { channel: 'some_channel' any_other_parameters: 'some value' }, received: (data) -> console.log data

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ActionController::Renderer

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MessagesController.render( partial: 'messages/message', locals: { message: params[:message][:body] } )

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Rails API

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rails new my-api-project --api

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AFributes API

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# app/models/product.rbclass Product < ApplicationRecord attribute :price_in_cents, MoneyType.new end

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class MoneyType < ActiveRecord::Type::Integer def type_cast(value) # convert values like '$10.00' to 1000 endend

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product = Product.new(price_in_cents: '$10.00') product.price_in_cents #=> 1000

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ApplicaJonRecord

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class ApplicationRecord < ActiveRecord::Baseend self.abstract_class = true

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ActiveRecord::Relation#or

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Project.flagged.or(Project.open) # orProject.where(name: "My Project"). or(Project.where(name: "Other Project"))

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ActiveRecord::Relation#in_batches

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Person.where("age >= 18").in_batches(of: 10) do |people| people.update_all(can_drink: true)end

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ActiveRecord::Base#has_secure_token

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class User < ApplicationRecord has_secure_token :email_verification_token end

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user = User.createuser.email_verification_token #=> 'e2426a93718d1817a43abbaa'

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user.regenerate_email_verification_token

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rake db:migrate

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rails db:migrate

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rake db:migrate

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Turbolinks 3

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Turbolinks 5

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Turbolinks 3

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Upgrading to Rails 5

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> Ruby 2.2.2

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Write tests

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Write good tests

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Write tests

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rails app:update

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Thanks!uberous.io / jrnv.nl

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