Lalit Shandilya shanlalit

Instrument Anything in Rails 3

With Rails 3.0 released a few weeks ago I've migrated a few apps and I'm constantly finding useful new improvements. One such improvement is the ability to log anything in the same way that Rails internally logs ActiveRecord and ActionView. By default Rails 3 logs look slightly spiffier than those produced by Rails 2.3: (notice the second line has been cleaned up)

Started GET "/" for 127.0.0.1 at Mon Sep 06 01:07:11 -0400 2010
  Processing by HomeController#index as HTML
  User Load (0.2ms)  SELECT `users`.* FROM `users` WHERE (`users`.`id` = 3) LIMIT 1
  CACHE (0.0ms)  SELECT `users`.* FROM `users` WHERE (`users`.`id` = 3) LIMIT 1

Rendered layouts/_nav.html.erb (363.4ms)

	/*
	Ancestry - jquery.ancestry.js
	As discussed in the jQuery Development Google Group.
	Released under the MIT license.

	Involved: Michael Geary, Diego Perini, John-David Dalton, John Resig, and Nathan Hammond
	Compiled: Nathan Hammond
	*/

	jQuery.comparePosition = function ( element, context) {

	#!/bin/sh
	#
	# PROVIDE: cccms
	# REQUIRE: nginx cleanvar

	. /etc/rc.subr

	name=cccms
	rcvar=`set_rcvar`

	########################################
	### Start with a "clean" environment ###
	########################################

	mmoen@shiny:~/tmp$ gem environment
	RubyGems Environment:
	- RUBYGEMS VERSION: 1.3.5
	- RUBY VERSION: 1.8.6 (2009-08-04 patchlevel 383) [i686-darwin10.2.0]
	- INSTALLATION DIRECTORY: /Users/mmoen/.rvm/gems/ruby/1.8.6
	- RUBY EXECUTABLE: /Users/mmoen/.rvm/ruby-1.8.6-p383/bin/ruby

	// An Unobtrusive Javascript (UJS) driver based on explicit behavior definitions. Just
	// put a "data-behaviors" attribute on your view elements, and then assign callbacks
	// for those named behaviors via Behaviors.add.

	var Behaviors = {
	add: function(trigger, behavior, handler) {
	document.observe(trigger, function(event) {
	var element = event.findElement("*[data-behaviors~=" + behavior + "]");
	if (element) handler(element, event);
	});

	require "net/http"
	http = Net::HTTP.new("example.com")
	http.open_timeout = 2
	http.read_timeout = 3 # Must be greater than open_timeout
	begin
	http.start
	begin
	http.request_get("/whatever?") do \|res\|
	res.read_body
	end

	# This patch gives us an easy way to globally disable/enable the cache
	Rails.cache.class.class_eval do
	attr_accessor :enabled
	def read_with_enabled(*args, &block)
	enabled ? read_without_enabled(*args, &block) : nil
	end
	alias_method_chain :read, :enabled
	end

	if File.basename($0) == "rake" && ARGV.include?("db:migrate")

	=Navigating=
	visit('/projects')
	visit(post_comments_path(post))

	=Clicking links and buttons=
	click_link('id-of-link')
	click_link('Link Text')
	click_button('Save')
	click('Link Text') # Click either a link or a button
	click('Button Value')

	// The `quickEach` method will pass a non-unique jQuery instance
	// to the callback meaning that there will be no need to instantiate
	// a fresh jQuery instance on each iteration. Most of the slow-down
	// inherent in jQuery's native iterator method (`each`) is the constant
	// need to have access to jQuery's methods, and so most developers
	// see constructing multiple instances as no issue... E.g.
	// $(...).each(function(){ $(this)... $(this)... $(this)... });
	// A better approach would be `quickEach`.

	jQuery.fn.quickEach = (function(){

	Ever wondered how to login as another user within Devise?

	Recently we had a feature request that would provide Admins with the ability
	to sign is as another user. You could imagine live demonstrations or even production
	support calls where you would like to be signed in as another user, yet not
	have to ask for or decrypt their current password. After stewing for a bit, we found a
	pretty nice solution with Devise.

	Here's the Cucumber feature...