Category Archives: rails

Rails: seed data from fixtures

Suppose you want to collect your seed data from your fixtures…

past the following in you db/seeds.rb – file:
Dir.glob('test/fixtures/*.yml').each do |file|
ActiveRecord::Fixtures.create_fixtures("#{Rails.root}/test/fixtures", File.basename(file).split(".").first)

Works in my new Rails 3.2.10 environment using ruby 1.9.3

automated patching against SQL Injection Vulnerability in Ruby on Rails (CVE-2012-5664)

Suppose you have a server with multiple rubies, rvms, gemsets, etc…

Manually finding and patching all affected activerecord-gems would be pretty cumbersome.

The following script does the job for you:

#!/usr/bin/env ruby

SEARCH_DIR = "/" # by default search the entire filesystem
ACTIVERECORD_GEM_VERSIONS = ['2.3','3.0','3.1','3.2']
'2.3' => '',
'3.0' => '',
'3.1' => '',
'3.2' => '',

#1. Find all activerecord 2.3.x, 3.0.x, 3.1.x, 3.2.x gems on this machine
gem_paths = {}
puts "Searching for activerecord gems inside #{SEARCH_DIR} ... "
gem_paths[version] = `find #{SEARCH_DIR} -path '*/gems/activerecord*' -name 'activerecord-#{version}.*' -type d`.split("\n")
puts "Found the following activerecord gems for version #{version}:"
puts gem_paths[version]

#2. Download the 4 patches here
puts "Downloading the patches ... "
`wget -O patch-#{version}.patch --no-check-certificate #{PATCHES[version]}`
puts " ... done"

#3. Apply the patches
gem_paths[version].each do |gem|
puts "--------------------------\nApplying patch for gem #{gem}"
puts `cd '#{gem}'; patch -tN -p2 < '#{File.expand_path(File.dirname(__FILE__))+"/patch-"+version+".patch"}'` end end

This script searches for affected activerecord gems, downloads the required patches and applies them individually.

You might need to run it as root, and it could take a while searching your entire filesystem...
If you know where all your gems are located change the
SEARCH_DIR = "/yougemrepository"

Tested on linux, freebsd

romanian translation for spree_i18n

Are you using spreecommerce?

We too 🙂

We just completed a romanian translation for spree, it’s available in the “official” spree_i18n-gem.
Take a look at our translation we just commited:

To use it in your rails app, simply:
1. Add the following to your Gemfile
gem 'spree_i18n', :git => 'git://'

2. Insert the following line in you config/application.rb

module Spreee
class Application < Rails::Application ... config.i18n.default_locale = :ro end end

3. bundle install - și gata 🙂

getting bundler, unicorn to play nice with a rails 2.3.x-app

We have a situation here:
– a rails 2.3.5 app
– unicorn must be used as deploy solution
– rack gems 1.1.0 AND 1.0.1 installed

unicorn_rails requires rack 1.1.0
after that somewhere in the rails app rack 1.0.1 is required

So we get an error like this: “can’t activate rack (~> 1.0.1, runtime) for [], already activated rack-1.1.0”

Our solution:
– use bundler:
– small modifications in the rails 2.3.x-files:
– configure and create the gem bundle
– start unicorn in the “bundler context” like this:
/usr/local/bin/bundle exec “/usr/local/bin/unicorn_rails -c config/unicorn.rb -E production”

unicorn start/stop and monitoring script

Today I wanted to write a script which could be used to start/stop/restart unicorn for a given application – without root privileges, to get a status and a special action(monitor) which can be called periodically and will restart unicorn automatically in case something went wrong

I found this very usefull blogpost on the net and modified the script with 2 additional “methods”: status and monitor. (I know … the code I added is pretty primitive… but it works)



class Runner
class << self def start system "cd #{APP_PATH}; #{UNICORN_RAILS} -c ./config/unicorn.rb -E production -D" end def reload system "kill -s USR2 #{pid}" end def restart stop start end def graceful_stop system "kill -s QUIT #{pid}" end def stop system "kill #{pid}" end def pid "#{APP_PATH}/tmp/pids/" end def status begin system "ps -o user,pid,ppid,command -ax | grep #{pid}" rescue puts 'not started' end end #start if killed def monitor begin #this throws an exception in 2 cases: #1. if no unicorn-process for the current user exists #2. if the pid functions fails(throws an error) due to non-existant throw 'processes killed manually' if (`ps -o user,pid,ppid,command -ax | grep #{pid}`).split("\n").size <= 2 rescue puts 'restarting ... ' start end end end end case ARGV[1] when "start" Runner.start when "reload" Runner.reload when "restart" Runner.restart when "stop" Runner.stop when "status" Runner.status when "monitor" Runner.monitor else STDERR.puts "usage ./unicorn_script.rb absolute_path_to_RAILS_ROOT [start|stop|restart|status|monitor]" exit(1) end

This script can be called from a cron every minute like this

* * * * * /path/to/this_script /path/to/rails_root/ monitor

It baiscally checks if the unicorn-processes exist(the master process and his spawned kids). If it does not detect at least one unicorn-process it will calls the start routine.