bdurand

Current ActiveRecord code:

Selector Thread reports shared record exists
Thread 1    (0.8ms)  BEGIN
Thread 1 running before_destroy callback
Thread 2    (0.6ms)  BEGIN
Thread 2 running before_destroy callback
Selector Thread reports shared record exists
Thread 1 running before_destroy callback
Thread 2 running before_destroy callback

bdurand

require 'rubygems'
require 'active_record'
require 'logger'

# Run as `ruby row_lock_test.rb [mysql|postgresql]` to see current Rails behavior when two processes
# try to destroy a record at the same time.
#
# Run as `ruby row_lock_test.rb [mysql|postgresql] patch` to see the behavior desired in pull request
# https://github.com/rails/rails/pull/7965
#

bdurand

require 'rubygems'
require 'active_record'

ActiveRecord::Base.establish_connection("adapter" => "sqlite3", "database" => ":memory:")

class Widget < ActiveRecord::Base
  connection.create_table table_name do |t|
    t.string :name
    t.integer :thing_count
  end unless table_exists?

bdurand

#!/usr/bin/env ruby

require 'bundler'
require 'benchmark'

REGEXPS = [
  /^no such file to load -- (.+)$/i,
  /^Missing \w+ (?:file\s*)?([^\s]+.rb)$/i,
  /^Missing API definition file in (.+)$/i,
  /^cannot load such file -- (.+)$/i,