This week's Ruby news, issue 294

Jobs

• Senior Backend Engineer at Drivy (Paris, France)We're building the #1 peer-to-peer car rental service in Europe and we're looking for an experienced Ruby developer to help us tackle some exciting challenges. Drivy
• Ruby and JavaScript Developer (SF Bay Area)Join an awesome web/mobile/DB consultancy that emphasizes teamwork and learning and puts employees first in everything we do. Beezwax
• The top VC-backed startups use Underdog.io to hire engineers. Join in 60 seconds.If you’re accepted, startups will email you as soon as next Monday. You decide where to interview and where to work. Now open in SF, NYC, and remote. Join Underdog.io today. Underdog.io

In brief

• Book: Agile Web Development with Rails 5 news
  The latest edition of the canonical Rails book. In beta now, final in June. 
  The Pragmatic Bookshelf
• Rails 5 Adds 'accessed_fields' to Find Fields Actually Being Used news 
  Abhishek Jain
• Major Changes to Test Controllers in Rails 5 news 
  Abhishek Jain
• Get Live 1:1 Ruby Expert Help / Become a Ruby Codementor 
  Are you a Ruby expert? Become a Codementor and get paid by helping your fellow developers. Learn Ruby faster with on-demand live expert help via screen sharing, video and chat. 
  Codementor   Sponsored
• How the US Government Gets High Availability with Elasticsearch and Rails tutorial 
  18F Digital Services
• Using Postgres’ Hstore datatype in Rails tutorial 
  Aly Badawy
• Null Objects and the Law of Demeter tutorial 
  James Coglan
• How to Find Ruby Code Smells with Reek tutorial 
  Piotr Szotkowski
• Using Webpack with Middleman tutorial
  ‘Ditch Sprockets and embrace the external pipeline.’ 
  Ross Kaffenberger
• How to Receive and Reply to an SMS from Rails with Twilio tutorial 
  Greg Baugues
• Rails Fragment Caching in 7 Minutes video 
  Dave Kimura
• When to Avoid The DRY Principle opinion 
  Luke Morton
• In What World Would Ruby Become Faster Than Go? opinion 
  Eleanor McHugh
• Why You Should Consider Grape for Building Web APIs opinion
  And you can mount Grape-built APIs inside any other Rack / Rails app. 
  Glauco Custódio
• Founders/CTOs: We upgrade Rails so that your team doesn't have to. tools
  Upgrade Rails is a new service from the founders of Hint.io and Honeybadger.io. Let our expert team keep your apps up to date so that you can focus on features, not maintenance. 
  Upgrade Rails   Sponsored
• A Rails, React, Relay and GraphQL Tutorial and Demo App codetutorial
  Tutorials plus a demo app covering using ES6-based React to consume a declarative Rails-based GraphQL API. 
  John Davison
• Rodauth: Auth and Account Management Framework for Rack Apps code
  When used with Postgres, MySQL or SQL Server it provides extra security by using their security functions. 
  Jeremy Evans
• Helpy: Open Source Mobile-First 'Helpdesk' App code 
  Helpy
• AwsSesNewsletters: Send Newsletters via Amazon SES from Rails code 
  10Pines