Ruby

2.2.2+

puma

• default dev server
• ActionCable development

ActionCable

• Websocket Support
• Channels
• Subscriber

API only Apps

• Rails API project
• Stripped Down Apps

rails new my-app-api --api

Command Router

• rake db:migrate => rails db:migrate
• rake and rails are not consistent

Attributes API

• attribute class method
• Custom DataTypes

         class MoneyType < ActiveRecord::Type::Integer
           def type_cast(value)
             if value.include?('$')
               price_in_dollars = value.gsub(/\$/, '').to_f
               price_in_dollars * 100
             else
               value.to_i
             end
           end
         end
      
         class StoreListing < ActiveRecord::Base
           attribute :price_in_cents, MoneyType.new
         end
      
         store_listing = StoreListing.new(price_in_cents: '$10.00')
         store_listing.price_in_cents # => 1000

ApplicationRecord

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

  include MyCustomErrorsModule
end

class Product <  ApplicationRecord
end

ActionController::Renderer

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

ActiveRecord#or

Post.where('id = 1').or(Post.where('id = 2'))
# => SELECT * FROM posts WHERE (id = 1) OR (id = 2)

TestRunner

• Single/Multiple tests
• Better Error messages
• Fail fast
• Colored output
• Minitest integration, and more

Snappier Development Mode

• file system monitor using mtimes

• evented file system monitor

• listen gem

Versioned Migrations

class CreateUsers < ActiveRecord::Migration[5.0]
  def change
    create_table :users do |t|
      t.string :name
      t.timestamps
    end
  end
end


# Rails 4
 t.references :user, index: true, foreign_key: true

# Rails 5
 t.references :user, foreign_key: true

Others

Rails 5 series

@vipulnsward

@BigBinary