charly

class PgSearch::Document
  belongs_to :article, -> {where("searchable_type = 'Article'")}, 
             foreign_key: 'searchable_id'

  belongs_to :info, -> {where("searchable_type = 'Info'")}, 
             foreign_key: 'searchable_id'
end

@searched = PgSearch.multisearch(@query).
      with_pg_search_highlight.

charly

# Activate the gem you are reporting the issue against.
gem 'activerecord', '4.0.0'
require 'active_record'
require 'minitest/autorun'
require 'logger'

# Ensure backward compatibility with Minitest 4
Minitest::Test = MiniTest::Unit::TestCase unless defined?(Minitest::Test)

# This connection will do for database-independent bug reports.

charly

require 'matrix'

def regression x, y, degree
  x_data = x.map {|xi| (0..degree).map{|pow| (xi**pow) }}
  mx = Matrix[*x_data]
  my = Matrix.column_vector y

  ((mx.t * mx).inv * mx.t * my).transpose.to_a[0].reverse
end

charly

Combining Scopes & Ransack thanks to Virtus & Siphon

There's a common feature request on the [ransack][2] issue page and that's to integrate your usual ActiveRecord scopes within the search. Indeed ransack is a fantastic tool to quickly setup a form for selecting table rows depending on column values. But it falls a little short when you want more complex, relational searches. So you almost naturally add a scope in your ransack powered search form before you realize it doesn't work and there's no clear way to do it.

Ransack won't take it all

The problem with that attractive and somewhat obvious feature request is [ransack][2] relies on the typecasting activerecord performs on its attributes, to coerce all the string values of the parameter's hash into their real value. When params[:user][:age_gt] => "18" barges into your model it knows "18" should be an Integer (because the corresponding DB column says so) and will pursue accordingly.

On the flip side your model has no reason to know what's the ar

charly

# Helps you migrate from attachment_fu
# put it in your /lib dir and include it your xxxx_uploader.rb
module UploaderFu
  
  def partition_dir
    ("%08d" % model.id).scan(/\d{4}/).join("/")
  end   
  
  def model_dir
    "#{model.class.to_s.underscore}/#{mounted_as}/"

charly

module Mongoid
  def self.included(base)
    base.extend NoProxyAssociation
  end
  
  # This little piece of codes creates an author method in Book
  # which instanciates an anonymous class with Author included!
  # def author
  #   klass = Class.new do 
  #     include Book::Author

charly

require "rubygems"
require "xml/libxml"
#require "active_support"



def traverse(node)
  children = node.children.select {|a| a.element?}
  txt = "<h1>HTML output</h1><ul>"
  last_depth, depth = 1, 1

charly

class Asset < ActiveRecord::Base
  acts_as_taggable_on :tags, :people

  # FIRST ATTEMPT
  def tag_list=(new_tags)
    set_tag_list_on('tags',new_tags.downcase)
  end

  def person_list=(new_tags)
    set_tag_list_on('people',new_tags.downcase)

charly

module MyTransaction
  def save
    Transaction.instance_eval do
      @@save = instance_method(:save)
      remove_method :save
    end
  
    body = "my transaction! + " + super
    
    Transaction.module_eval do

charly

require "rubygems"
require "uninclude"

module Core
  def save; "saved" end
end

module Dirty
  def save; "clean + " + super end
end