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# Ever needed to dynamically rewrite the conditions on a has_many association?
# This is definitely a hack, but useful if parameterizing or adding scopes are
# not practical for whatever reason.

class Group < ActiveRecord::Base
  # Any association will do
  has_many :people

  def filter_people(conditions)
    # All calls to this method after the association is traversed and before a reload

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class Foo
  def self.foo
    'foo'
  end

  private

  def self.bar
    'bar'
  end

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# Source: http://jkfill.com/2011/05/13/log-which-line-called-redirect_to/
#
# Toss this in ApplicationController and all redirects will generate a log statement

unless Rails.env.production?
  def redirect_to(options = {}, response_status = {})
    ::Rails.logger.error("Redirected by #{caller(1).first rescue "unknown"}")
    super(options, response_status)
  end
end

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  # incorrect
  describe 'foo' do
    it 'should bar' do
      @foo = Factory(:foo)
      @foo.bar
      @foo.should_receive :bar # wrong
    end
  end

  # correct

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-  create_table "book_authors", :force => true do |t|
+  create_table "book_authors", :id => false, :force => true do |t|
+    t.integer  "id",         :null => false

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# Assuming you have high-voltage installed

# routes.rb
match 'long-blitz-string' => 'pages#forty_two'

# app/controllers/pages_controller.rb
def forty_two
  '42'
end

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# config/initializers/squelch_asset_pipeline.rb

if Rails.env.development?
  Rails::Rack::Logger.class_eval do 
    def call_with_quiet_assets(env)
      previous_level = Rails.logger.level
      Rails.logger.level = Logger::ERROR if env['PATH_INFO'].index("/assets/") == 0 
      call_without_quiet_assets(env).tap do
        Rails.logger.level = previous_level
      end 

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#!/usr/bin/python

def is_user_good_enough(username):
  return False

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# ApplicationController
# Source: http://stackoverflow.com/questions/31320/how-to-profile-a-rails-controller-action

around_filter :profile if Rails.env.development?

def profile
  if params[:profile] && result = RubyProf.profile { yield }
    out = StringIO.new
    RubyProf::GraphHtmlPrinter.new(result).print out, :min_percent => 0
    self.response_body = out.string

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# With before filter

class FoosController < ApplicationController
  before_filter :find_foo, :only => [:edit, :show, :update]

  def create
  end

  def edit
  end