Kelsey Hannan KelseyDH

Setting up a local DNS server with bind on OSX Mavericks

This is really just an approach for locally testing DNS changes, which can easily be done with a HOSTS file if the change involves an IP address, but gets a bit trickier when things like CNAMEs are involved. This is only meant to test locally off a single machine.

Install bind using homebrew

brew install bind
Follow the installation steps to start up bind

Data Migrations in Rails Apps

If you need to manipulate existing data when your code is deployed, there are two main ways to do it:

Create a rake task to migrate the data after the code is deployed. This is ideal for more complex data migrations.
Use ActiveRecord models in a migration. This is acceptable for smaller data manipulations.

Regardless of the method you use, make sure to test your migrations before submitting them.

Data Migrations in Models

Ruby on Rails Windows Troubleshooting Tips & Survival Guide

Intro/Overview

The Ruby on Rails Windows Troubleshooting tips & Survival Guide is a random catalogue of issues I faced working with Ruby on Rails on Windows (Windows 7 specifically). This guide is not exhaustive, but covers many of the challenges that causes Windows Ruby developers to jump ship to Linux or Mac. If you're reading this guide then you're probably new to Ruby/Rails, so also included is more general beginner advice to help you get going.

Personal Side Note

Before you follow this guide, I strongly recommend you consider using Linux or Mac OS X for Ruby Development instead. Looking to prove a point as a challenge, I ignored this strongly given advice while learning Ruby/Rails. While I eventually did succeed in getting Ruby on Rails to work in Windows, it was not easy, and I easily lost 40+ hours on StackOverFlow to Windows/Ruby configuration issues--time I could have devoted to learning more about th

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CarrierWave home

https://github.com/jnicklas/carrierwave

This example will create an uploader that will upload a file stored in a model Model. The file will be stored locally in development and test environment and will use Amazon S3 in production.

CarrierWave installation

First add the gems.

	require 'anima'
	require 'transproc'

	require 'virtus'

	require 'benchmark/ips'

	USERS = 1000.times.map { \|i\| { id: "#{i+1}", name: "User #{i+1}", age: "#{(i+1)*2}" } }

	module Mappings

	class DeployTask
	attr_accessor :app_suffix, :heroku_app, :git_branch, :force, :enter_maintenance

	def initialize(options = {})
	@app_suffix = options[:app_suffix]
	@heroku_app = options.fetch(:heroku_app, default_app_name)
	@git_branch = options.fetch(:git_branch, current_branch)
	@force = options.fetch(:force, false)
	@enter_maintenance = options.fetch(:enter_maintenance, true)
	end

	class ApplicationModel < ActiveRecord::Base

	# http://stackoverflow.com/questions/1183506/make-blank-params-nil
	class_attribute :null_attrs
	self.null_attrs = %w( )
	def nil_if_blank
	self.class.null_attrs.each { \|attr\|
	self[attr] = nil if self[attr].blank?
	}
	end

	alias gs="git status"
	alias gbr="git for-each-ref --sort=-committerdate refs/heads/"
	alias ga="git add"
	alias gaa="git add -A"
	alias gc="git commit"
	alias gci="git ci"
	alias gph="git push origin HEAD"
	alias gphk="git push heroku master"
	alias gdc="git diff --cached"
	alias gd="git diff"

	#!/usr/bin/env bash

	# ~/.osx — http://mths.be/osx

	# Ask for the administrator password upfront
	sudo -v

	# Keep-alive: update existing `sudo` time stamp until `.osx` has finished
	while true; do sudo -n true; sleep 60; kill -0 "$$" \|\| exit; done 2>/dev/null &