Adding out-of-stock items to cart and checking out does not throw error on server - How to handle inventory levels?

[tannergaucher]

Greetings!

I noticed that I can add a product to my cart and checkout where the selectedVariant object has values of currentlyNotInStock: true and quantityAvailable: 0

Currently I'm disabling buttons on the client based on the currentlyNotInStock boolean, but obviously the situation requires more than a client-only solution, as in a high-volume scenario stock levels have likely changed since I loaded the page.

Does Shopify really not handle product inventory levels server-side? I expected the cartLineAdd mutation to not send a 200 response on an out-of-stock product. And the same for checking out.

What's the correct way to ensure that we are not allowing customers to purchase items that are not in stock?

[jplhomer]

Hi @tannergaucher! Great question. Mind dropping that into https://github.com/Shopify/storefront-api-feedback/discussions as it seems to be a Storefront API question related to our new Cart API?