Let me try and better explain the issues this causes as I see them. Hopefully you can clarify.
- The term Locations is being used for too many things. It's a POS, a Fulfillment service, and now a generic inventory location. But they all work differently and are not documented. This is the root of most of the confusion.
- There's a new "Fulfillment priority" setting that says it will assign orders to locations, and split orders if a single location does not have enough inventory. This is not working at all. Orders are always assigned to the first location in the list regardless of inventory levels, and orders are never split as the setting says they will be. Even if orders were split, the API provides no way to identify if an order was assigned to multiple locations because location_id does not exist in line_items.
- The "Change Location" option in the Shopify order UI does not do anything when clicked.
Here's an example of an order that should have split its lines into two locations based on inventory. It did not. Also the Change location option does nothing when clicked.
Here's a quote from the "Edit fulfillment priority" screen in Shopify:
Locations at the top of the list are assigned orders first. If one location can’t fulfill the whole order, it will get split and assigned to multiple locations.
Adam, your question regarding product_variant.inventory_quantity was answered by Ryan on another thread. He commented "Yes inventory_quantity will remain on product variant as a read-only property. It will reflect the sum of inventory available at all locations."
