Course: Ruby on Rails 4.2

$180.29 incl. vat


duration: 15 hours |

Language: English (US) |

access duration: 90 days |


In this Ruby on Rails training course you will learn the basics and most important functions of Ruby on Rails 4.2. So you will learn the Rails environment which containts routing and the ActionController. After that you will learn about models and views in Ruby and you will be familiar with the advanced functions like the Action Mailer and testing & debugging.
Topics that are covered are the Rails evironment, secrets.yml, has_one, has_many, belongs_to, .select & .pluck methodes, de Rails view helper, Pundit, Russian Doll caching, Factory Girl, rails-api and far more.


After completing this course you are familiair with the basic and most important advanced features of Ruby on Rails 4.2.


No specific knowledge is required. It is a plus when you have basic knowledge of programming.

Target audience

Software Developer, Web Developer


Ruby on Rails 4.2

15 hours

Introduction to Rails

  • start the course
  • describe Rails
  • set up the Rails environment
  • create a new project
  • recall how to change different settings
  • describe where the secrets.yml file is found and what it contains
  • describe how to use the bundler
  • create a new Logger and describe how the Rails.logger method is used
  • generate a basic scaffold
  • describe the scaffold
  • describe what the routes.rb file is and how it is used
  • describe how to use a singular resource route
  • create nested resource routes
  • create shallow resource routes
  • create static pages
  • describe what migrations are and how they are used
  • create and sequence a migration
  • perform and roll back a migration
  • recall what some of the migration and database constraints are
  • recall how to edit the seeds.rb file
  • describe the controller actions INDEX, NEW, and CREATE
  • describe the member actions SHOW, EDIT, UPDATE, and DESTROY
  • use respond_to to render JSON and XML
  • use the ActionController::Live module
  • use action callbacks
  • use variants to render different templates based on some criteria
  • generate a basic scaffold and create shallow routes

Introduction to Models

  • start the course
  • describe the basics of how ActiveRecord works
  • use has_one, has_many, and belongs_to associations
  • use the :through association
  • make one class belongs_to more than one type of another class
  • use virtual attributes
  • persist data into multiple models
  • describe Hstore and how it is used
  • perform model validation
  • use conditional validation
  • use custom validators in models
  • use custom validators in classes
  • compare using the errors[ ] with the invalid? method
  • recall what methods do not invoke validations
  • protect against attacks by controlling mass-assignment attributes
  • use .where and .find
  • execute a raw SQL query
  • compare the .select and .pluck methods
  • use different finder methods to retrieve objects from the database
  • define and chain query criteria
  • chain scopes with lambdas
  • load all the specified associations with the minimum number of queries
  • use active model
  • recall how to use modules to share functionality between disparate model classes
  • use conditional callbacks
  • use transaction callbacks
  • use ActiveRecord to model data

Introduction to Views

  • start the course
  • use rendering and layouts
  • use partials to break up the render process into modular chunks
  • use FormHelper to provide a set of methods for working with HTML forms
  • describe how Rails uses the flash object to display errors
  • use CsrfHelper to output meta tags with the name of the cross-site request forgery protection parameter and token
  • use UrlHelper to make links and get URLs that depend on the routing subsystem
  • use the Rails view helper
  • write custom helpers
  • use formatting view helpers
  • set up Rails for Internationalization
  • use the session hash to store and access data and read and write cookies
  • install devise
  • configure devise
  • install Pundit
  • configure Pundit
  • describe how the asset pipeline looks for assets to include
  • code links to assets
  • use fingerprinting and minification
  • use CDNs to improve performance
  • describe how server-generated JavaScript works with Rails
  • use Turbolinks to attach a click handler to all links of an HTML page
  • use fragment caching
  • implement collection caching and cache keys
  • use Russian Doll caching
  • create initializers inside of gems
  • create custom rake tasks
  • use different elements within views and sessions

Advanced Rails

  • start the course
  • use Sidekiq to create an ActiveJob
  • use Sidekiq to handle queue management of ActiveJobs
  • add exception handling on queues
  • create and configure a mailer
  • use mailer views and templates
  • implement the mail call in controller
  • customize the mailer
  • use different tools to debug Rails applications
  • configure RSpec
  • run tests
  • use Factory Girl
  • unit test models
  • use RSpec mocking and stubbing facilities
  • test validations
  • use matchers to work with classes that implement module Enumerable
  • write functional controller tests
  • test views
  • test helpers
  • test integrations
  • use shared_examples
  • write tests for active jobs
  • test mailers
  • use VCR to record HTTP integrations
  • use guard to automatically run tests
  • generate performance tests
  • create tests for a user model

Examining Rails APIs

  • start the course
  • create an API application
  • add rails-api to an existing project
  • use Postman to test results
  • work with endpoints for INDEX and CREATE
  • work with endpoint for SHOW, UPDATE, and DESTROY
  • render JSON manually
  • render JSON with active_model_serializers
  • use versioning
  • generate access tokens for authentication
  • use SessionsController for issuing and validating access tokens
  • use the authenticate_or_request_with_http_token method
  • perform authentication with Devise
  • set up Apipie Gem
  • document resources and actions using Apipie
  • customize validators for Apipie
  • use RDoc for documentation
  • use Rack::Test to test HTTP response codes
  • work with log directories
  • implement Unicorn as a web server
  • use Kaminari for pagination
  • create search forms with Ransack
  • describe the basics of elasticsearch
  • manipulate CSV files
  • use rjb to connect Ruby with Java
  • customize error pages
  • put search on an API endpoint

Course options

We offer several optional training products to enhance your learning experience. If you are planning to use our training course in preperation for an official exam then whe highly recommend using these optional training products to ensure an optimal learning experience. Sometimes there is only a practice exam or/and practice lab available.

Optional practice exam (trial exam)

To supplement this training course you may add a special practice exam. This practice exam comprises a number of trial exams which are very similar to the real exam, both in terms of form and content. This is the ultimate way to test whether you are ready for the exam. 

Optional practice lab

To supplement this training course you may add a special practice lab. You perform the tasks on real hardware and/or software applicable to your Lab. The labs are fully hosted in our cloud. The only thing you need to use our practice labs is a web browser. In the LiveLab environment you will find exercises which you can start immediatelyThe lab enviromentconsist of complete networks containing for example, clients, servers,etc. This is the ultimate way to gain extensive hands-on experience. 


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