Matt Long mattlong

Rails dirty

After modifying an object and after saving to the database, or within after_save:

	def real_csrf_token(token)
	Base64.strict_decode64(token)
	end

	def xor_byte_strings(s1, s2)
	s2_bytes = s2.bytes
	s1.each_byte.with_index { \|c1, i\| s2_bytes[i] ^= c1 }
	s2_bytes.pack("C*")
	end

	ruby '2.7.1'

	gem 'rails', github: 'rails/rails'
	gem 'tzinfo-data', '>= 1.2016.7' # Don't rely on OSX/Linux timezone data

	# Action Text
	gem 'actiontext', github: 'basecamp/actiontext', ref: 'okra'
	gem 'okra', github: 'basecamp/okra'

	# Drivers

	# Here's a contrived example of a LEFT JOIN using ARel. This is an example of
	# the mechanics, not a real-world use case.

	# NOTE: In the gist comments, @ozydingo linked their general-purpose ActiveRecord
	# extension that works for any named association. That's what I really wanted!
	# Go use that! Go: https://gist.github.com/ozydingo/70de96ad57ab69003446

	# == DEFINITIONS
	# - A Taxi is a car for hire. A taxi has_many :passengers.
	# - A Passenger records one person riding in one taxi one time. It belongs_to :taxi.

	module ActiveRecordExtension
	extend ActiveSupport::Concern

	module ClassMethods
	# Simple left join taking advantage of existing Rails & Arel code
	def left_joins(*args)
	inner_joins = self.joins(*args).arel.join_sources
	left_joins = inner_joins.map do \|join\|
	Arel::Nodes::OuterJoin.new(join.left, join.right)
	end

	#!/bin/bash

	parents_of_dead_kids=$(ps -ef \| grep [d]efunct \| awk '{print $3}' \| sort \| uniq \| egrep -v '^1$'); echo "$parents_of_dead_kids" \| xargs kill

	# If you get "Inappropriate ioctl for device" when decrypting
	# Thanks to https://github.com/keybase/keybase-issues/issues/2798
	export GPG_TTY=$(tty)

	#!/bin/bash

	sudo kextunload /System/Library/Extensions/AppleHDA.kext
	sudo kextload /System/Library/Extensions/AppleHDA.kext

	See question on stack overflow: http://stackoverflow.com/questions/28595636/rails-4-how-to-give-alias-names-to-includes-and-joins-in-active-record-que

	- Model Student and model Teacher are both STI models with super class model User
	- Model Story is a STI model with super class model Task
	- includes() and joins(), both fails

	Rails alias naming convention (includes() and joins())

	- One model as parameter
	- is base model (includes(:users))