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Rails 5 adds after_commit callbacks aliases

on May 11, 2016
This blog is part of our Rails 5 series.

Rails 4.x has after_commit callback. after_commit is called after a record has been created, updated or destroyed.

1class User < ActiveRecord::Base
2  after_commit :send_welcome_mail, on: create
3  after_commit :send_profile_update_notification, on: update
4  after_commit :remove_profile_data, on: destroy
5
6  def send_welcome_mail
7    EmailSender.send_welcome_mail(email: email)
8  end
9end

Rails 5 added new aliases

Rails 5 had added following three aliases.

  • after_create_commit
  • after_update_commit
  • after_destroy_commit

Here is revised code after using these aliases.

1class User < ApplicationRecord
2  after_create_commit	:send_welcome_mail
3  after_update_commit	:send_profile_update_notification
4  after_destroy_commit	:remove_profile_data
5
6  def send_welcome_mail
7    EmailSender.send_welcome_mail(email: email)
8  end
9end

Note

We earlier stated that after_commit callback is executed at the end of transaction. Using after_commit with a transaction block can be tricky. Please checkout our earlier post about Gotcha with after_commit callback in Rails .


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