How to know if the triggered events succeed or fail in Yii2

Question

I trigger an event in Yii2 transaction, and I want to know if the event handler succeed to commit the transaction, or fail to rollback.

Is a global variable or class const the right way?

What I do now is throwing an error in the event handlers.

Answer 1

Usually you're using event object to store state of event. Create custom event:

class MyEvent extends Event {

    public $isCommited = false;
}

Use it on trigger and check the result:

$event = new MyEvent();
$this->trigger('myEvent', $event);
if ($event->isCommited) {
    // do something
}

In event handler you need to set this property:

function ($event) {
    // do something
    $event->isCommited = true;
}

---

If you want to break event flow you may use $handled property instead of isCommited and custom event.