janko

Hey Sean,

I just encountered your "The Bike Shed" podcast, concretely number #56 where you were talking about the "ActiveRecord is Reinventing Sequel" post I wrote. I'm sorry that this post struck you as negative, and that it made you feel like I was attacking you. I admit that I did feel some negative energy while I was writing it, but I still felt like I needed to say it.

Firstly, you said in the podcast that you would like to read an article which shows parts where Sequel is better than ActiveRecord. However, I did link my previous "Ode to Sequel" post in the first paragraph of my post, and soon after added two more. So I think it's a bit unfair that I was pr

janko

API

• You sometimes need to create an API

  • You want frontend and backend separate
  • You need REST API alongside the web app (GitHub, DNSimple, Travis)

• JSON API specifications

janko

# lib/carrierwave/orm/activerecord.rb from jnicklas/carrierwave


# before
class_eval <<-RUBY, __FILE__, __LINE__+1
  def #{column}=(new_file)
    column = _mounter(:#{column}).serialization_column
    send(:"\#{column}_will_change!")
    super
  end

janko

############
# GROUPING #
############

def Given(*) end

Given(/There (is|are) some links?/) { } # ERROR

Given(/There (?:is|are) some links?/) { }

janko

require "mail"

Mail.defaults do
  delivery_method :smtp,
    address:        "smtp.gmail.com",
    port:           587,
    user_name:      ENV["GMAIL_EMAIL"],
    password:       ENV["GMAIL_PASSWORD"],
    authentication: "plain",
end

janko

Dynamic eager loading

• Static: User.includes(:posts => :comments)

• Dynamic: :posts => :comments is a product of user's input

Where did I need this?

janko

module SocialPresenter

  # ...

  class Twitter < Struct.new(:object)

    def message
      case object
      when String

janko

#################
# CLASSIC STYLE #
#################

class SessionsController < ApplicationController
  # ...

  def create
    if user = AuthenticateUser.call(params[:username], params[:password])
      sign_in!(user)

janko

# 1. Models (Entities)
# 
# * The nouns of your business logic
# * Usually persisted in the database
# * Usually contain validations
# * Usually expose associations with other models
# * Usually have scopes (to encapsulate the query logic)

################
# ActiveRecord #

janko

gem "active_model_serializers", "0.10.0.rc1"

require "yaks"
require "active_record"
require "active_model_serializers"
require "benchmark/ips"

ActiveRecord::Base.establish_connection(adapter: "postgresql", database: "testing")
ActiveRecord::Schema.define do
  create_table :users, force: true do |t|