lexmag

module VirtualAttributes
  extend ActiveSupport::Concern

  class VirtualAttribute < Struct.new(:klass); end

  module ClassMethods
    def attr_virtual(*attrs)
      options = attrs.extract_options!

      attrs.each do |attr|

lexmag

module VirtualAttributes
  extend ActiveSupport::Concern

  module ClassMethods
    def attr_virtual(*attrs)
      options = attrs.extract_options!

      attrs.each do |attr|
        class_eval do
          send("attr_accessor", attr)

lexmag

module VirtualAttributes
  extend ActiveSupport::Concern

  class VirtualAttribute
    attr_reader :name, :type
  
    def initilaize(name, type = :string)
      @name = name
      @type = type
    end

lexmag

% rails g model Hotel
% rails g model Hotel::Translation # or hotel/translation

lexmag

<%= form_for @post do |f| %>
  <%= f.text_field :title, value: 'It will never change', readonly: true %>
  <%= f.text_field :description, value: 'You will not see it in params', disabled: true %>
  <%= f.button :submit %>
<% end %>

<!-- params[:post] => { "title"=>"It will never change" } -->

lexmag

class Article < ActiveRecord::Base # Product class is similar
  belongs_to :user
  has_many :media, as: :ownable
  with_options through: :media, source: :representable do |assn|
    assn.has_many :videos, source_type: 'Video'
    assn.has_many :images, source_type: 'Image'
  end
end

lexmag

<%= simple_form_for(@product) do |f| %>
  <%= f.input :title %>         <!-- string -->
  <%= f.input :description %>   <!-- text -->
  <%= yield(f) if block_given? %>
  <%= f.button :submit %>
<% end %>

lexmag

//= require jquery
//= require jquery_ujs

$(function() {
  var source = new EventSource('/stream');
  source.addEventListener('counter', function(e) {
    $('body').after(e.data + '<br />');
  });
});

lexmag

require 'sinatra'
set server: :thin

get '/' do
  erb :welcome
end

get '/stream', provides: 'text/event-stream' do
  stream do |out|
    loop do

lexmag

Erlang/OTP 18 RC-1

Elixir 1.1.0-dev

• new

• put

  • 100 elements

  MapSet:    10000000   0.16 µs/op