Event to skip saving a revision

[ryssbowh]

Would be useful to allow developers to not save a revision based on an event.

My use case is the following : I have one section that users are allowed to save on the frontend, there's one field in there that I need admins to see the history of, all the rest we don't care about.
I have set the maxRevisions setting to 0 to be able to see all history, which creates loads of revisions for this section (and all the others, but that's a different issue : #11477), which for most of them aren't needed and are clogging up the database.

With such an event I can calculate field changes myself and skip the revision if needed.

[brandonkelly]

Just made this possible for Craft 5.6: (0aa4936)

use craft\elements\Entry;
use craft\events\RevisionEvent;
use craft\services\Revisions;
use yii\base\Event;

Event::on(
    Revisions::class,
    Revisions::EVENT_BEFORE_CREATE_REVISION,
    function(RevisionEvent $event) {
        if (
            $event->canonical instanceof Entry &&
            $event->canonical->section?->handle === 'myHandle' &&
            Craft::$app->request->isSiteRequest
        ) {
            // avoid creating a revision
            $event->handled = true;
        }
    }
);

Note that setting $event->handled = true will only prevent a revision from getting created if at least one revision already exists for the element. Otherwise it will be ignored.

[ryssbowh]

That was quick ! Thank you