pifleo

# Keep code struture in models consistent
# Inspired by http://rails-bestpractices.com/posts/75-keep-code-struture-in-models-consistent
# One example: (From top to bottom)

    associations
    scopes
    class methods
    validates
    callbacks
    instance methods

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

wrburgess

##Refs

• wkhtmltopdf
• wicked_pdf
• Blog: Generate PDFs in Rails 3.2

Install wicked_pdf

Add to Gemfile: gem 'wicked_pdf'

jordelver

7 Patterns to Refactor Fat ActiveRecord Models

http://blog.codeclimate.com/blog/2012/10/17/7-ways-to-decompose-fat-activerecord-models/

1. Extract Value Objects
2. Extract Service Objects
3. Extract Form Objects
4. Extract Query Objects
5. Introduce View Objects
6. Extract Policy Objects

stevenyap

Gemfile

gem 'simple_form'

Installation

rails generate simple_form:install

brunopgalvao

<%= form_for @person do |f| %>
  <%= f.label :first_name, "First Name" %>:
  <%= f.text_field :first_name, list: 'first-name' %>
  <datalist id="first-name">
    <% Person.all.each do |person| %>
      <option value="<%= person.first_name %>"></option>
    <% end %>
  </datalist>
  <%= f.submit %>
<% end %>

joshteng

#Goal Deploy your Rails App super easily with Dokku on Digital Ocean cheap cheap!

##Notes

• Follow 12 factor design (include the rails_12factor gem)
• Don't forget your Procfile with the command to start up your application server
• I prefer using external hosted logging services like Logentries (not in this guide)
• Set up performance monitoring AppSignal or New Relic (not in this guide)

mlanett

HTTP status code symbols for Rails

Thanks to Cody Fauser for this list of HTTP responce codes and their Ruby on Rails symbol mappings.

Status Code Symbol
1xx Informational
100 :continue
101 :switching_protocols
102 :processing

henrik

My notes for Dokku on Digital Ocean.

These may be a bit outdated: Since I originally wrote them, I've reinstalled on a newer Dokku and may not have updated every section below.

Commands

Install dokku-cli (gem install dokku-cli) for a more Heroku-like CLI experience (dokku config:set FOO=bar).

# List/run commands when not on Dokku server (assuming a "henroku" ~/.ssh/config alias)

ssh henroku dokku

jakimowicz

%Q, %q, %W, %w, %x, %r, %s, %i

Perl-inspired notation to quote strings: by using % (percent character) and specifying a delimiting character.

Any single non-alpha-numeric character can be used as the delimiter, %[including these], %?or these?, %~or even these things~.

Strings

% or %Q