watson

# app/models/ability.rb

# All front end users are authorized using this class
class Ability
  include CanCan::Ability

  def initialize(user)
    user ||= User.new

    can :read, :all

markoa

namespace :deploy do
  desc "Hot-reload God configuration for the Resque worker"
  task :reload_god_config do
    sudo "god stop resque"
    sudo "god load #{File.join(deploy_to, 'current', 'config', 'resque-' + rails_env + '.god')}"
    sudo "god start resque"
  end
end

# append to the bottom:

bsodmike

Implement Routing for Subdomains

Rails 3.0 introduced support for routing constrained by subdomains.

A subdomain can be specified explicitly, like this:

match '/' => 'home#index', :constraints => { :subdomain => 'www' } 

azinazadi

more: https://github.com/justinfrench/formtastic

-> make form for all db columns
  <%= semantic_form_for @user do |f| %>
    <%= f.inputs %>
    <%= f.buttons %>
  <% end %>

-> select cols
  <%= semantic_form_for @user do |f| %>

samqiu

#!/usr/bin/ruby
require 'rss'

# Usage
# $ ./railscasts.rb http://railscasts.com/subscriptions/YOURRAILSCASTRSS/\/
#     episodes.rss
# OR
# $ ./railscasts.rb

p 'Downloading rss index'

keikubo

Nginx + Unicorn for Rails on Rackhub

Description:

This script enables you to launch your Rails application in production environment (port:80) with Nginx and Unicorn.

Installation:

Please make sure that your Gemfile in your rails application includes unicorn.

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

mckeed

require 'strong_parameters'

class ActiveRecord::Base
  include ActiveModel::ForbiddenAttributesProtection
end

class ActionController::Base
  
  # Use this with CanCan's load_resource to permit a set of params before
  # it tries to build or update a resource with them.

rgreenjr

-- 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%' 

mt3

# Credit http://stackoverflow.com/a/2514279
for branch in `git branch -r | grep -v HEAD`;do echo -e `git show --format="%ci %cr" $branch | head -n 1` \\t$branch; done | sort -r