How can I tag pre-orders in Shopify flow when item quantity is zero?

[ZLA1]

I would like to tag orders with a pre-order tag using shopify flow when -

any item on the order has available quantity <=0 for a specific location.

Our current flow is not working correctly as it is looking at quantity across all locations.

My Flow trigger is order created.

Attached screenshot of current flow.

[paul_n · Accepted solution]

You have a loop in that condition (order / lineItems / variant / inventoryItem / variant), which you should remove. That is NOT checking location inventory.  Instead you should check:
order / lineItems / variant / inventoryItem / inventoryLevels / available (its under deprecated)

Overall your condition should look close to this:

if at least one of order / lineItems
 if at least one of variant / inventoryItem / inventoryLevels
     level_item.available <= 0
     AND
     location.name == "Warehouse"