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A Capistrano Rails Guide

by Jonathan Rochkind, http://bibwild.wordpress.com

why cap?

Capistrano automates pushing out a new version of your application to a deployment location.

I've been writing and deploying Rails apps for a while, but I avoided using Capistrano until recently. I've got a pretty simple one-host deployment, and even though everyone said Capistrano was great, every time I tried to get started I just got snowed under not being able to figure out exactly what I wanted to do, and figured I wasn't having that much trouble doing it "manually".

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sudo add-apt-repository ppa:pitti/postgresql
sudo apt-get update
sudo apt-get install postgresql-9.2 postgresql-server-dev-9.2 postgresql-contrib-9.2

sudo su -l postgres
psql -d template1 -p 5433
CREATE EXTENSION IF NOT EXISTS hstore;
CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
service postgresql stop
/usr/lib/postgresql/9.2/bin/pg_upgrade -b /usr/lib/postgresql/9.1/bin -B /usr/lib/postgresql/9.2/bin -d /var/lib/postgresql/9.1/main/ -D /var/lib/postgresql/9.2/main/ -O "-c config_file=/etc/postgresql/9.2/main/postgresql.conf" -o "-c config_file=/etc/postgresql/9.1/main/postgresql.conf"

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#install required packages
apt-get update
apt-get upgrade -y
apt-get install -y git curl build-essential libssl-dev libcurl4-openssl-dev nodejs

#install sqlite3 (optional)
apt-get install libsqlite3-dev sqlite3

#install postgres (optional)
sudo apt-get install postlibpq-dev

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Rails flash messages with AJAX requests

original: http://stackoverflow.com/a/10167659/656428

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# Bundler Integration
require "bundler/capistrano"

# Application Settings
set :application,   "yourapplicationname"
set :user,          "serveruser"
set :deploy_to,     "/home/#{user}/rails-applications/#{application}"
set :rails_env,     "production"
set :use_sudo,      false
set :keep_releases, 3

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# config/initializers/active_admin.rb

require 'active_admin_custom_filter'

ActiveAdmin.setup do |config|
  # ...
end

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Brakeman setup:

Create ignore file, please name it .brakeman-ignore

bin/brakeman --interactive-ignore

Add to script/ci

bin/brakeman --quiet --skip-libs --exit-on-warn --ignore-config=.brakeman-ignore

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In Rails 3

NOTE: This post now lives (and kept up to date) on my blog: http://hakunin.com/rails3-load-paths

If you add a dir directly under app/

Do nothing. All files in this dir are eager loaded in production and lazy loaded in development by default.

If you add a dir under app/something/

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# Add these two gems
gem 'ice_cube',                     '0.9.3'
gem 'squeel',                       '1.0.16'

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# config/initializers/active_admin.rb

require 'active_admin_custom_filter'

ActiveAdmin.setup do |config|
  # ...
end