Lukom

# app/admin/email_previews.rb
ActiveAdmin.register_page 'Email Previews' do
  menu parent: 'dashboard', priority: 10

  content do
    div '1'
  end

  sidebar 'Mail Previews' do
    Dir['test/mailers/previews/**/*_preview.rb'].each do |preview_path|

LeonardoCardoso

# GPG on Tower

hyperionel

# Commonmarker's default html renderer: https://github.com/gjtorikian/commonmarker/blob/master/lib/commonmarker/renderer/html_renderer.rb
# It has a sepparate method for each type of html tag it supports

# paragraph method:

def paragraph(node)
  if @in_tight && node.parent.type != :blockquote
    out(:children)
  else
    block do

alarrosa14

// Based in http://stackoverflow.com/a/2686098/4436816

//
// Usage examples: 
// {{ 2134124 | abbreviate:2}} -> 2.13M 
// {{ 2134124 | abbreviate }}  -> 2M
// {{ 1000 | abbreviate }}     -> 1K

myApp.filter('abbreviate', function() {
    return function(number, decPlaces) {

zulhfreelancer

If you get error like this:

Running via Spring preloader in process 7662
/Users/zulh/.rvm/gems/ruby-2.3.1@useradmin/gems/activesupport-4.2.6/lib/active_support/dependencies.rb:274:in `require': dlopen(/Users/zulh/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0/x86_64-darwin15/readline.bundle, 9): Library not loaded: /usr/local/opt/readline/lib/libreadline.6.dylib (LoadError)
  Referenced from: /Users/zulh/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0/x86_64-darwin15/readline.bundle
  Reason: image not found - /Users/zulh/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0/x86_64-darwin15/readline.bundle
	from /Users/zulh/.rvm/gems/ruby-2.3.1@useradmin/gems/activesupport-4.2.6/lib/active_support/dependencies.rb:274:in `block in require'
	from /Users/zulh/.rvm/gems/ruby-2.3.1@useradmin/gems/activesupport-4.2.6/lib/active_support/dependencies.rb:240:in `load_dependency'
	from /Users/zulh/.rvm/gems/ruby-2.3.1@useradmin/gems/activesupport-4.2.6/lib/active_support/dependencies.rb:274:in `require'

sobstel

# `ERROR:  Error installing nokogiri:
# ERROR: Failed to build gem native extension.
# 
#   current directory: /usr/local/var/rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/nokogiri-1.7.0/ext/nokogiri
# /usr/local/var/rbenv/versions/2.3.1/bin/ruby -r ./siteconf20170103-68488-r71c9j.rb extconf.rb --with-xml=/usr/local/Cellar/libxml2/ --use-system-libraries
# checking if the C compiler accepts ... yes
# checking if the C compiler accepts -Wno-error=unused-command-line-argument-hard-error-in-future... no
# Building nokogiri using system libraries.
# ERROR: cannot discover where libxml2 is located on your system. please make sure `pkg-config` is installed.
# *** extconf.rb failed ***

taranda

Dynamically Add Critical CSS to Your Rails App

Optimizing the delivery of CSS is one way to improve user experience, load speed and SEO of your web app. This involves determining the "critical path CSS" and embeding it into the html of your page. The rest of the CSS for the site is loaded asynchronously so it does not block the rendering of your "above the fold" content. This Gist will show you how to dynamically generate critical path CSS for your Rails app.

In this example we will use the mudbugmedia/critical-path-css gem.

Prerequisites

You will need to set up caching and Active Job in your Rails app. I recommend using a thread-safe background job manager like resque.

Chocksy

Differences between team gemfile and your preferences

The solution for the above problem is to have a different gemfile that you run your rails app against. It can be easily done by adding some terminal aliases to use a different gemfile file. I made that in the current configuration and it works well.

syafiqfaiz

1. Change your database RDS instance security group to allow your machine to access it.
   • Add your ip to the security group to acces the instance via Postgres.
2. Make a copy of the database using pg_dump
   • $ pg_dump -h <public dns> -U <my username> -f <name of dump file .sql> <name of my database>
   • you will be asked for postgressql password.
   • a dump file(.sql) will be created
3. Restore that dump file to your local database.
   • but you might need to drop the database and create it first
   • $ psql -U <postgresql username> -d <database name> -f <dump file that you want to restore>

• the database is restored

jeffreyjurgajtis

Details:
https://devcenter.heroku.com/articles/heroku-postgres-backups
 
$ heroku pg:backups capture  #=> <backup_number>
$ heroku pg:backups public-url <backup_number>  #=> <backup_url>
$ curl -o latest.dump <backup_url>
 
(drop and re-create local database)
$ pg_restore --verbose --clean --no-acl --no-owner -h localhost -U myuser -d mydb latest.dump