kule

require 'bundler/inline'

gemfile do
  source 'https://rubygems.org'
  gem 'colorize'
end

class MatcherInterface
  def initialize(some_object)
    @some_object = some_object

ProGM

Arel Cheatsheet on Steroids

A (more) complete cheatsheet for Arel, including NamedFunction functions, raw SQL and window functions.

Tables

posts = Arel::Table.new(:posts)
posts = Post.arel_table # ActiveRecord

Table alias

swanson

# Add color coding based on Rails environment for safety

if defined? Rails
  banner = if Rails.env.production?
    "\e[41;97;1m #{Rails.env} \e[0m "
  else
    "\e[42;97;1m #{Rails.env} \e[0m "
  end

  # Build a custom prompt

them0nk

#Model 

@user.should have(1).error_on(:username) # Checks whether there is an error in username 
@user.errors[:username].should include("can't be blank")  # check for the error message 

#Rendering
response.should render_template(:index)

#Redirecting 
response.should redirect_to(movies_path)

pixeltrix

When should you use DateTime and when should you use Time?

It's a common misconception that [William Shakespeare][1] and [Miguel de Cervantes][2] died on the same day in history - so much so that UNESCO named April 23 as [World Book Day because of this fact][3]. However because England hadn't yet adopted [Gregorian Calendar Reform][4] (and wouldn't until [1752][5]) their deaths are actually 10 days apart. Since Ruby's Time class implements a [proleptic Gregorian calendar][6] and has no concept of calendar reform then there's no way to express this. This is where DateTime steps in:

>> shakespeare = DateTime.iso8601('1616-04-23', Date::ENGLAND)
=> Tue, 23 Apr 1616 00:00:00 +0000
>> cervantes = DateTime.iso8601('1616-04-23', Date::ITALY)
=> Sat, 23 Apr 1616 00:00:00 +0000

trcarden

# SSL self signed localhost for rails start to finish, no red warnings. 

# 1) Create your private key (any password will do, we remove it below)

$ openssl genrsa -des3 -out server.orig.key 2048


# 2) Remove the password

$ openssl rsa -in server.orig.key -out server.key

progapandist

Fixing Webpacker 3.3.0 + Rails 5.1.5

Heroku hosting trouble

Heroku may not detect a correct buildpack for your JS dependencies, then you have to set it manually:

heroku buildpacks:add heroku/nodejs -i 1
heroku buildpacks:add --index 2 https://github.com/heroku/heroku-buildpack-ruby

printercu

Speed up integration tests in Rails 5 app

Rails 5 recompiles templates on every request in test env. Fix will be released only in 5.0.2.

Add this lines to test helper to get the performance now (I've got x2 improvement):

class << ActionView::LookupContext::DetailsKey
 def clear

txus

# RSpec matcher to spec delegations.
#
# Usage:
#
#     describe Post do
#       it { should delegate(:name).to(:author).with_prefix } # post.author_name
#       it { should delegate(:month).to(:created_at) }
#       it { should delegate(:year).to(:created_at) }
#     end

otaviomedeiros

# RSpec matcher for validates_with.
# https://gist.github.com/2032846
# Usage:
#
#     describe User do
#       it { should validate_with CustomValidator }
#     end

RSpec::Matchers.define :validate_with do |validator|
  match do |subject|