Murillo Parreira murparreira

Open Source AngularJS Rails Apps

Expect some false positives here, but hopefully most of these are open source Rails apps that use (or once used) AngularJS.

If you'd like to help update the list, please comment below with any of these apps you discover do not use AngularJS and include my username (@eliotsykes) in your message.

Confirmed using AngularJS

https://github.com/openfoodfoundation/openfoodnetwork

Adding an audit log to your Rails app

If you have any sort of administrative interface on your web site, you can easily imagine an intruder gaining access and mucking about. How do you know the extent of the damage? Adding an audit log to your app is one quick solution. An audit log should record a few things:

controller entry points with parameter values
permanent information about the user, like user_id
transient information about the user, like IP and user_agent

Using the Rails framework, this is as simple as adding a before_action to your admin controllers. Here’s a basic version that I’m using in production.

Navigate to http://nodejs.org/download/ and on the Linux Binaries (.tar.gz) row click to download the 64-bit version of the current latest release.
Say you've downloaded node-v0.10.7-linux-x64.tar.gz into the Downloads directory. Then, open the terminal and type the following:

$ cd ~/Downloads
$ mkdir -p ~/local/node
$ tar xzf node-v0.10.7-linux-x64.tar.gz -C ~/local/node --strip-components=1
$ echo '# Node Enviroment Setup' >> ~/.bashrc
$ echo 'export PATH=$HOME/local/node/bin:$PATH' &gt;&gt; ~/.bashrc

Transactions

As your business logic gets complex you may need to implement transactions. The classic example is a bank funds transfer from account A to account B. If the withdrawal from account A fails then the deposit to account B should either never take place or be rolled back.

Basics

All the complexity is handled by ActiveRecord::Transactions. Any model class or instance has a method named .transaction. When called and passed a block, that block will be executed inside a database transaction. If there's an exception raised, the transaction will automatically be rolled back.

	# lib/tasks/db.rake
	namespace :db do

	desc "Dumps the database to db/APP_NAME.dump"
	task :dump => :environment do
	cmd = nil
	with_config do \|app, host, db, user\|
	cmd = "pg_dump --host #{host} --username #{user} --verbose --clean --no-owner --no-acl --format=c #{db} > #{Rails.root}/db/#{app}.dump"
	end
	puts cmd

	require 'rubygems'
	require 'mechanize'

	class Pokemon
	attr_accessor :name, :moves, :abilities
	def initialize
	@name = ''
	@moves = []
	@abilities = []
	end

	require 'rubygems'
	require 'mechanize'
	types = ['bug', 'dark', 'dragon', 'electric', 'fairy', 'fighting', 'fire', 'flying', 'ghost', 'grass', 'ground', 'ice', 'normal', 'poison', 'psychic', 'rock', 'steel', 'water']
	FOLDER_PATH = "/path/to/your/running/script/"
	types.each do \|type\|
	array = []
	agent = Mechanize.new
	puts "Visiting #{type} page!"
	type_page = agent.get("http://www.serebii.net/pokedex-xy/#{type}.shtml")
	noko = Nokogiri::HTML(type_page.body)

	-- show running queries (pre 9.2)
	SELECT procpid, age(clock_timestamp(), query_start), usename, current_query
	FROM pg_stat_activity
	WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%'
	ORDER BY query_start desc;

	-- show running queries (9.2)
	SELECT pid, age(clock_timestamp(), query_start), usename, query
	FROM pg_stat_activity
	WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%'