How to add flash message after checkout session returns?

[yuripinto]

How can I add a flash message after returning from the checkout session?

In the example below, I want to create a success message when the user creates a new subscription:

class SubscriptionsController < ApplicationController
  before_action :authenticate_user!

  def new
    checkout_session = current_user.payment_processor.checkout(
      mode: 'subscription',
      line_items: 'sample',
      success_url: root_url,
      cancel_url: root_url
    )
    redirect_to checkout_session.url, allow_other_host: true, status: :see_other
  end

  def edit
    portal_session = current_user.payment_processor.billing_portal
    redirect_to portal_session.url, allow_other_host: true, status: :see_other
  end
end

[excid3]

Use your success URL.

Add a param or send them to a success page.

success_url: root_url(flash: true),
# or
success_url: success_url

[yuripinto]

Worked! Thanks, Chris!