activerecord-after-transaction

Execute a proc after transaction.

You basically don't need this gem if you use after_commit. However, let's say you have state_machine gem and want to do something after transition, the gem doesn't provide a way to do it. In this case, you might have written the following code.

def after_commit(record)
  if record.previous_changes[:state] == ['draft', 'published']
    UserMailer.notify_publish(record).deliver
  elsif record.previous_changes[:state] == ['draft', 'deleted']
    UserMailer.notify_delete(record).deliver
  end 
end 

It spoils the readability of state_machine. You definitely want to write the following instead.

after_transition from: :draft, to: :published do
  UserMailer.notify_publish(record).deliver
end
after_transition from: :draft, to: :deleted do
  UserMailer.notify_publish(record).deliver
end

That's why I made this gem. :)

Add the activerecord-after-transaction gem to your Gemfile.

gem "activerecord-after-transaction"

And run bundle install.

Just enslose what you want to execute with after_transaction.

class Foo < ActiveRecord::Base
  def after_transition(record, transition)
    if transition.to == :published
      after_transaction do
        UserMailer.notify_publish(record).deliver
      end
    elsif transition.to == :deleted
      after_transaction do
        UserMailer.notify_delete(record).deliver
      end
    end
  end
end

Then, the proc will be executed after the transaction. If it's not in the transaction, it will be executed immediately.

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request

Copyright (c) 2014 Daisuke Taniwaki. See LICENSE for details.