avit

class NilObject
  def true?;    false end
  def false?;   true end
  def nil?;     true end
  def blank?;   true end
  def present?; false end
  def empty?;   true end
  def to_s;     "" end
  def !;        true end

avit

gem 'activerecord', '4.0.0.beta'
require 'active_record'
require 'logger'

ActiveRecord::Base.logger = Logger.new(STDOUT)
ActiveRecord::Base.logger.level = Logger::INFO
ActiveRecord::Base.establish_connection( :adapter  => 'sqlite3',
                                         :database => ':memory:' )

ActiveRecord::Schema.define do

avit

describe Rate do
  it "can do arithmetic" do
    total = Rate.new(amount: 100.00) + Rate.new(amount: 200.00)
    total.should == 300.00
  end
end


class Rate < ActiveRecord::Base
  attr_accessible :amount

avit

class Army < AR:B
  has_many :robots
  has_many :weapons
end

class Robot < AR:B
  belongs_to: :army
  has_one :weapon
end

avit

class MyMailer < ActionMailer::Base

  def notice(user)
    # ...
    mail(to: @to, from: @from, subject: @subject) do |format|
      format.html { render text: @html_content }
      format.text { render text: @text_content }
    end
  end
end

avit

# Goal: split responsibilities of count and grouped_count so they are responsible for returning
#       count => Fixnum and grouped_count => Hash in all cases
#
# This option removes original calculation options for count(:group => x)
# in favour of grouped_count(:group => x)
#
# (I'm showing count and average as examples of optional & required column_name params, 
# but this would apply to all calculation methods.)

relation = Post.group("author_id").order("created_at")

avit

class SomethingsController < ActionController::Base
  def create
    Time.zone = current_user.time_zone
    @another_user = current_user.friends.find(params[:friend_id])

    FriendMailer.message(@another_user).deliver

    # Wouldn't Time.zone be reset by the mailer before rendering the page here?
  end
end

avit

<!-- this combination of inputs will throw Rack -->

<input name="event[dates][]" type="date" />
<input id="event_dates__destroy" name="event[dates][_destroy]" type="hidden" />

avit

Oct 16 19:56:48 localhost mysqld_safe[27557]: ERROR: 1064  You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ALTER TABLE user ADD column Show_view_priv enum('N','Y') CHARACTER SET utf8 NOT ' at line 1
Oct 16 19:56:48 localhost mysqld_safe[27557]: 121016 19:56:48 [ERROR] Aborting

avit

class Foo < ActiveRecord::Base

  serialize :check_in, TimeOfDayAttribute # dump/load for valid, empty, nil values tested independently

  # Setter will handle both String & TimeOfDay input
  # I want to test the getter before defining (and depending on) this method
  def check_in=(param)
    # ...
  end
end