janko

require "benchmark/ips"

File.write "minitest_test.rb", <<-EOS
require "minitest/autorun"
require "minitest/pride"

class MintestTest < Minitest::Test
  def test_foo
    assert true
  end

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

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|

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

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

class SessionsController < ApplicationController
  # ...

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

janko

module SocialPresenter

  # ...

  class Twitter < Struct.new(:object)

    def message
      case object
      when String

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

require "active_record"

ActiveRecord::Base.establish_connection('postgres:///testing')
ActiveRecord::Migration.verbose = false

ActiveRecord::Migration.class_eval do
  create_table :played_quizzes, force: true do |t|
    t.integer :player_ids, array: true
    t.json    :quiz_snapshot
  end

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

Full-text search

• Keywords

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• Stopword ignore