rails 5 – amsterdam.rb – uberous
TRANSCRIPT
amsterdam.rb
Rails 5What's new?
Rails 5 by Jeroen Visser 1
amsterdam.rb
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
amsterdam.rb
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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