Help with comparing stamp count in flow condition

Help
1

I’m trying to create a conditional action in a Directus flow that checks whether a card has collected all the stamps required by the related offer.

In my flow, I have a “Read Data” step called get_card which successfully returns a card, its related offer, and all its stamps.

My condition looks like this:

{
  "{{get_card.count(stamps)}}": {
    "_eq": "{{get_card.offer.stamps_required}}"
  }
}

{{get_card.offer.stamps_required}} works perfectly — but the {{get_card.stamps(count)}} part always comes back as undefined.

I’ve tried variations like {{get_card.stamps.length}} and {{get_card.stamps.count}}, but no luck.

Am I referencing the stamp count incorrectly here? What’s the correct way to get the number of related items in a flow condition?

Thanks in advance! :folded_hands: