email_after_commit

📧 Send Emails After Commit with after_commit

Use after_commit to trigger external side-effects like sending emails only after the transaction successfully commits. This guards against sending notifications for rolled-back changes.

class Purchase < ApplicationRecord
  after_commit :send_receipt_email, on: :create

  private

  def send_receipt_email
    ReceiptMailer.with(purchase: self).deliver_later
  end
end

on: :create ensures the callback runs only for new records, and deliver_later enqueues the mail job, keeping request times fast.