dhh

# MODEL

class Case < ActiveRecord::Base
  include Eventable
  
  has_many :tasks

  concerning :Assignment do
    def assign_to(new_owner:, details:)
      transaction do

dhh

class GroupersController < ApplicationController::Base
  def create
    @grouper = Grouper.new(leader: current_member)

    if @grouper.save
      confirm_grouper_via_emails(@grouper)
      enqueue_bar_assignment(@grouper)

      redirect_to home_path
    else

jonwolfe

class @GoogleAnalytics

  @load: ->
    # Google Analytics depends on a global _gaq array. window is the global scope.
    window._gaq = []
    window._gaq.push ["_setAccount", GoogleAnalytics.analyticsId()]

    # Create a script element and insert it in the DOM
    ga = document.createElement("script")
    ga.type = "text/javascript"

jeremy

Declared ETags, together with Russian Doll caching, can be used to automatically mix your template and asset versions into the ETags set in your controllers. This avoids the need to blow all browser caches on each deploy and neatly contains the scope of "freshness fallout" when you tweak a view.

To include the template's version in the ETag:

  # Incorporate the cache version for this action into our ETag.
  # This allows template changes to bubble up into HTTP cache
  # freshness and bust browser caches when we make changes.
  etag do
    begin

Sujimichi

class ApplicationController < ActionController::Base

  ...
  #Problem:
  #In rails 3.0.1+ it is no longer possible to do this anymore;
  #  rescue_from ActionController::RoutingError, :with => :render_not_found
  #
  #The ActionController::RoutingError thrown is not caught by rescue_from.
  #The alternative is to to set a catch-all route to catch all unmatched routes and send them to a method which renders an error
  #As in http://techoctave.com/c7/posts/36-rails-3-0-rescue-from-routing-error-solution

zhengjia

=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')