Test for Arel bug in https://github.com/rails/arel/pull/243

rails-arel-update_all-bug.rb

gem 'rails', '4.0.2'
require 'active_record'
require 'logger'

# Print out what version we're running
# 4.0.2
puts "Active Record #{ActiveRecord::VERSION::STRING}"

# 4.0.1
puts "Arel #{Arel::VERSION}"

# Connect to a PostgreSQL database
ActiveRecord::Base.establish_connection(
  :adapter  => 'postgresql',
  :database => 'rails-arel-update_all-bug'
)

# Create schema
ActiveRecord::Schema.define do
  create_table :foos, :force => true do |t|
    t.string :name
  end
end

# Create a model
class Foo < ActiveRecord::Base
  def self.some_scope
    where arel_table[:name].matches('1')
  end
end

# reproduce bug

ActiveRecord::Base.logger = Logger.new(STDOUT)

# Works
puts Foo.some_scope.update_all(name: 'bar')

# Raises error
puts Foo.some_scope.order(:name).update_all(name: 'bar')