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Wait for AJAX Capybara

Add wait_for_ajax to your helper

def wait_for_ajax
  Timeout.timeout(Capybara.default_wait_time) do
    loop do
      active = page.evaluate_script('jQuery.active')
 break if active == 0

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Some Heroku commands

Open the bash shell

heroku run bash

Open Rails console

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How to make web fonts work on Heroku

Add the fonts path to your production.rb and development.rb

# Add the font path
config.assets.paths << Rails.root.join('app', 'assets', 'fonts')

# Include font files to Assets
config.assets.precompile &lt;&lt; /\.(?:svg|eot|woff|ttf)$/

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##Ruby (Rails) tips

####1. Array Initialization

if x.is_a?(Array)
  x.each { |x| puts x } 
else
  puts x
end

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Use rescue_form to avoid code duplication in Controller

class DealsController < ApplicationController
  before_filter :authenticate_user!, except: [:index, :show, :list]
  before_filter :authenticate_proposer, only: [:edit]

  rescue_from StandardError, with: :show_errors
  rescue_from Order::OrderNotFound, with: :show_errors
 

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Link to ViewHelper Rails

link_to(body, url, html_options = {})
  # url is a String; you can use URL helpers like
  # posts_path

link_to(body, url_options = {}, html_options = {})
  # url_options, except :method, is passed to url_for

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How to call a symbol method in Ruby

class Klass
  def hello(*args)
    "Hello " + args.join(' ')
  end
end
k = Klass.new
k.send :hello, "gentle", "readers" #=> "Hello gentle readers"

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The Cheetsheet