semipermeable

# db/migrate/20110714024435_split_author.rb
class SplitAuthor < ActiveRecord::Migration
  def self.up
    Post.where(:author=>nil).each do |p|
      author = Author.create!(:name => p.author_name,
                              :account_id => p.account_id)
      p.author = author
      p.save!
    end
  end

padde

Let's Encrypt with Nginx

Here's how I set up a tiny Nginx/Rails server that uses HTTPS via a Let's Encrypt issued certificate.

https://letsencrypt.paddd.de/

Server

I use the smallest DigitalOcean droplet (512 MB) here, which is built from the "Ubuntu Ruby on Rails on 14.04" image provided by them.

thewebfellas

user  nginx;
worker_processes  5;

error_log  /var/log/nginx.error.log;
pid        /var/run/nginx.pid;

events {
  worker_connections  1024;
}

travisp

class InvitationsController < Devise::InvitationsController

  # GET /resource/invitation/accept?invitation_token=abcdef
  def edit
    if params[:invitation_token] && self.resource = resource_class.to_adapter.find_first( :invitation_token => params[:invitation_token] )
      session[:invitation_token] = params[:invitation_token]
      render :edit
    else
      set_flash_message(:alert, :invitation_token_invalid)
      redirect_to after_sign_out_path_for(resource_name)

cjolly

newpg=9.6.1 # set to new PG version number
oldpg=`pg_config --version | cut -d' ' -f2`

# PG 96. upgrades the readline to v7, which breaks anything linked against readline v6, like ruby via ruby-build. 
# I *think* this should prevent it from installing v7. But if weird shit happens with various rubies, 
# you'll have to reinstall them.
brew pin readline

# Stop current Postgres server
brew services stop postgresql

polarblau

require 'rubygems'
require 'middleman/rack'

protected_middleman = Rack::Auth::Basic.new(Middleman.server) do |username, password|
  [username, password] == ['theuser', 'thepassword']
end

run protected_middleman

mislav

connection = Faraday::Connection.new('http://example.com') do |builder|
  builder.request :url_encoded  # for POST/PUT params
  builder.adapter :net_http
end

# same as above, short form:
connection = Faraday.new 'http://example.com'

# GET
connection.get '/posts'

ChuckJHardy

DigitalOcean Ubuntu 14.04 x64 + Rails 4 + Nginx + Unicorn + PostgreSQL + Capistrano 3

Create a Droplet

SSH into Root

$ ssh root@123.123.123.123

Change Root Password

JeffBelback

#!/bin/bash
# Stop all containers
containers=`docker ps -a -q`
if [ -n "$containers" ] ; then
        docker stop $containers
fi
# Delete all containers
containers=`docker ps -a -q`
if [ -n "$containers" ]; then
        docker rm -f -v $containers

runemadsen

Polymorphic Associations reversed

It's pretty easy to do polymorphic associations in Rails: A Picture can belong to either a BlogPost or an Article. But what if you need the relationship the other way around? A Picture, a Text and a Video can belong to an Article, and that article can find all media by calling @article.media

This example shows how to create an ArticleElement join model that handles the polymorphic relationship. To add fields that are common to all polymorphic models, add fields to the join model.