How do I add an 'order complete' from the Commerce module to the Rules events in Drupal 8?

Question

I need to add a new event to rules triggered by the successful completion of an order. The action is to grant a user a role which will expire in a fixed duration.

I've tried following the Rules documentation and adding a module with a *.rules.events.yml file. But modifying it to use the order_complete event which I got from this tutorial.

Unfortunately, even though it DID add an option to the events drop down, it doesn't trigger an action.

I've tried a grep through the commerce code for order_complete but it doesn't yield anything.

The action I've set to the rule is just to print a message.

Answer 1

After trying out combinations and with the helpful comments, the solution was to follow the Rules documentation but change the event to commerce_order.place.post_transition which I got from the tutorial.

The final code was to create a MODULENAME.rules.events.yml file and add the following code:

commerce_order.place.post_transition:
  label: 'Order has been completed'
  category: 'Order'

This created the option in the dropdown and allowed me to create the rule that triggered the action.

Answer 2

Interesting, this is the first time I've heard of someone trying to use Rules with Commerce 2 ... definitely not a lot of documentation on that. Likely you need to rebuild your cache and confirm the event is firing by using a very simple (not prone to breaking) action and/or enabling the debugging mode of rules (to see if the rule processed as requested).

Likely, your event is firing just fine but your action, which you provided no information on, is the culprit.