Ricardo Mejía O. mejiaro

has_many :through

In this exercise we are going to explore the has_many through relationship by creating a quick example. The first part of this markdown will be geared toward making a simple example that shows the relationship while the second part will consist of expanding the simple app to show the relationships in the browser.

We are going to use doctors and patients for this example.

As you could have guessed a doctor can have many patients and a patient can have many doctors. One way that we could facilitate this many to many relationship is by using an "associative table". We can call our associative table "appointments", which should help us make it easier to understand the relationship between doctors and patient.

De-'Async Inject' Universal Analytics

This gist applies the theory from Ilya Grigorik's Script-injected "async scripts" considered harmful on the default Universal Analytics snippet. TLDR place this above the CSS in the <head> of your document

<!-- Google Analytics Part 1: Creates window.ga, sets account, and queues pageview-->
<script>
  !function(n,t){n.GoogleAnalyticsObject=t,n[t]=n[t]||function(){(n[t].q=n[t].q||[]).push(arguments)},n[t].l=1*new Date}(window,"ga");
  ga('create', 'UA-XXXX-Y', 'auto'); // REPLACE UA-XXXX-Y w/ YOUR ACCOUNT
 ga('send', 'pageview');

How to install virtualenv:

Install pip first

sudo apt-get install python3-pip

Then install virtualenv using pip3

sudo pip3 install virtualenv

Run rails new --help to see all of the options you can use to create a new Rails application:

Output for Rails 7+

Usage:
  rails new APP_PATH [options]

Options:
      [--skip-namespace], [--no-skip-namespace]              # Skip namespace (affects only isolated engines)

	require 'openssl'
	require 'Base64'

	key = "secret-key"
	data = "some data to be signed"
	Base64.encode64(OpenSSL::HMAC.digest(OpenSSL::Digest::Digest.new('sha256'), key, data)).strip()

	#/bin/bash
	#-- Script to automate https://help.github.com/articles/why-is-git-always-asking-for-my-password

	REPO_URL=`git remote -v \| grep -m1 '^origin' \| sed -Ene's#.(https://[^[:space:]]).*#\1#p'`
	if [ -z "$REPO_URL" ]; then
	echo "-- ERROR: Could not identify Repo url."
	echo " It is possible this repo is already using SSH instead of HTTPS."
	exit
	fi

	sudo add-apt-repository ppa:webupd8team/sublime-text-3;
	sudo apt-get update;
	sudo apt-get install sublime-text-installer;
	sudo ln -s /usr/lib/sublime-text-3/sublime_text /usr/local/bin/sublime;

	# this monit config goes in /etc/monit/conf.d

	check process puma_master
	with pidfile /data/myapp/current/tmp/puma.pid
	start program = "/etc/monit/scripts/puma start"
	stop program = "/etc/monit/scripts/puma stop"
	group myapp

	check process puma_worker_0
	with pidfile /data/myapp/current/tmp/puma_worker_0.pid

	# This is just a cheat sheet:

	# On production
	sudo -u postgres pg_dump database \| gzip -9 > database.sql.gz

	# On local
	scp -C production:~/database.sql.gz
	dropdb database && createdb database
	gunzip < database.sql.gz \| psql database

	brew tap homebrew/versions
	brew install v8-315

	gem install libv8 -v '3.16.14.13' -- --with-system-v8
	gem install therubyracer -- --with-v8-dir=/usr/local/opt/v8-315

	bundle install