kivanio

module RangeScopes
  extend ActiveSupport::Concern
  
  module ClassMethods
     
    # Order.between(1..5) => pulls all orders who's ids are between 1 and 4
    # Order.between(:customer_id, 1..4) => pulls all orders who's orders.customer_id is between 1 and 4
    def between(*args)
      column = args.first.is_a?(Symbol) ? args.shift : :id
      range  = args.first

kivanio

module Accessible
  extend ActiveSupport::Concern

  included do
    has_many :accessibilities, as: :accessible, dependent: :destroy
    has_many :roles, -> { uniq }, through: :accessibilities
    scope :visible_to, ->(role_names) {
      role_names = [role_names] if [String, Symbol].include?(role_names.class)
      if role_names.include?(Role::ROOT_ROLE)
        all

kivanio

module Avatarable
  extend ActiveSupport::Concern

  GRAVATAR_IMAGE_BASE_URL     = 'http://www.gravatar.com/avatar/'
  GRAVATAR_IMAGE_DEFAULT_SIZE = '32'
  DEFAULT_URL                 = 'http://your-awesome-domain.com/images/your-awesome-default-image.png'

  # Avatarable assumes the class (or other module) that includes this module has an email attribute
  # if the email attribute is named something other than email, use alias_attribute to map it to email
  # alias_attribute :email, :your_email_attribute

kivanio

require 'fileutils'
require 'ostruct'
require 'pony'
require 'active_support'

module MakeEmailable
  extend ActiveSupport::Concern

  included do
    attr_reader   :sender, :receiver

kivanio

require 'active_support/concern'

module Concerns
  module Indexable
    class ResultList
      include Enumerable

      attr_accessor :results
      attr_accessor :total
      attr_accessor :from

kivanio

# 使用したいモデルでインクルード
# ex) include Concerns::ActivityTracker
module Concerns::PublicActivityTracker
  extend ActiveSupport::Concern

  module ClassMethods

    # create, update, destroy を監視します。
    # 引数に only か except を渡すことで update を監視したいカラムを限定できます。
    #

kivanio

class ExternalService
  include RateLimiter

  def self.work_with_users
    rate_limit 20, 2.0, User.find_each do |user|
      # Do stuff with each user.
      # Pause 2 seconds every 20 iterations
    end
  end
end

kivanio

require 'time'

module EasterCalculations
  extend ActiveSupport::Concern
  
  module ClassMethods
    def easter(year = nil)
      y = year ||= now.year
      c = y / 100
      n = y - 19 * ( y / 19 )

kivanio

# VAlidate Part Of Resource
module Vapor
  extend ActiveSupport::Concern

  included do
    class_attribute :target_name, :attribute_names
    include ActiveModel::Validations
    include ActiveModel::Conversion
    include ActiveModel::Naming
  end

kivanio

class ClassificationQuery
  Tag = ActsAsTaggableOn::Tag
  Tagging = ActsAsTaggableOn::Tagging

  def initialize(bill, tagger = nil)
    @bill, @tagger = bill, tagger
  end

  def count
    relation = Tag.select(Tag[:name], Arel.star.count).where(