Rostyslav Semanyshyn TeTiRoss

Growing Rails Applications in Practice

How to use discipline, consistency and code organization to make your code grow more gently.
As you cycle through patterns, your application is becoming a patchwork of different coding techniques.

All those new techniques actually help, or if you are just adding layers of inderection.
Large applications are large so what we can do is organize a codebase in a way that "scales logarithmically".

skip the authenticity token check for a json request

if you got this error while requesting the application via JSON request:

exception ActionController::InvalidAuthenticityToken

backtrace":"[\"/home/uadmin/.rvm/gems/ruby-2.1.7/gems/actionpack-4.2.4/lib/action_controller/metal/request_forgery_protection.rb:181:in `handle_unverified_request'\", 
\"/home/uadmin/.rvm/gems/ruby-2.1.7/gems/actionpack-4.2.4/lib/action_controller/metal/request_forgery_protection.rb:209:in `handle_unverified_request'\", 
...

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

Effective Engineer - Notes

By Edmond Lau
Highly Recommended 👍
http://www.theeffectiveengineer.com/

	# Git pre-commit hook to check all staged Ruby (*.rb/haml/coffee) files
	# for Pry binding references
	#
	# Installation
	#
	# ln -s /path/to/pre-commit.sh /path/to/project/.git/hooks/pre-commit
	#
	# Based on
	#
	# http://codeinthehole.com/writing/tips-for-using-a-git-pre-commit-hook/

	# This probably isn't a good thing to want to do, but it came up for me,
	# so in the spirit of helping others with weird problems (and because this
	# seems to be documented almost nowhere):

	after_save do

	if some_failing_condition
	errors.add(:something, "some failure happened.")
	raise ActiveRecord::RecordInvalid.new(self)
	end

	# This class shows uses version 0.28.7 of the ruby google-api-client gem circa April 2019
	# to query the Google Play subscription API.
	#
	# If using an older version of the google-api-client gem (ie. version 0.8.x), instead refer to:
	# https://gist.github.com/jkotchoff/e60fdf048ec443272045/e3e2c867633900d9d6f53de2de13aa0a0a16bb03
	#
	# Sample usage:
	#
	# package_name = 'com.stocklight.stocklightapp'
	# product_id = 'com.stocklight.stocklight.standardsubscription'

	HTTP status code symbols for Rails

	Thanks to Cody Fauser for this list of HTTP responce codes and their Ruby on Rails symbol mappings.

	Status Code Symbol
	1xx Informational
	100 :continue
	101 :switching_protocols
	102 :processing

	class MyJob < ActiveJob::Base
	queue_as :urgent

	rescue_from(NoResultsError) do
	retry_job wait: 5.minutes, queue: :default
	end

	def perform(*args)
	MyService.call(*args)
	end

	#
	# systemd unit file for Debian
	#
	# Put this in /lib/systemd/system
	# Run:
	# - systemctl enable sidekiq
	# - systemctl {start,stop,restart} sidekiq
	#
	# This file corresponds to a single Sidekiq process. Add multiple copies
	# to run multiple processes (sidekiq-1, sidekiq-2, etc).

	#
	# Sidekiq auto start using systemd unit file for Ubuntu 16.04
	#
	# Put this in /lib/systemd/system (Ubuntu).
	# Run:
	# 1. systemctl enable sidekiq (to enable sidekiq service)
	# 2. systemctl {start,stop,restart} sidekiq (to start sidekiq service)
	#
	# This file corresponds to a single Sidekiq process. Add multiple copies
	# to run multiple processes (sidekiq-1, sidekiq-2, etc).

Rostyslav Semanyshyn TeTiRoss

Growing Rails Applications in Practice

skip the authenticity token check for a json request

Effective Engineer - Notes

What's an Effective Engineer?