[GraphQL Storefront API] Get cart id by customer

Hydrogen and Storefront APIs
3

Hi Adam,

At this time there is no way to retrieve a cart from a specific customer using the Storefront API only. The only way to retrieve a cart via the Storefront API is with the cart’s id.

However I do have a couple different workarounds I can suggest:

  1. Most Recommended: When the cart is created on one storefront, you save the cart id and customer id to a backend database on your end that can be accessed by any Headless Storefronts clients to retrieve the associated cart from the customer id.

  2. Using the Customer Account API, make a metafieldsSet mutation call to save the customer’s last cart id in a custom metafield on the Customer Object. Then you can use the Storefront API to retrieve the cart id from the metafield on any other storefront.

  3. Using the Customer Account API, you can access the customer.lastIncompleteCheckout field to get info on the customers last abandoned checkout, including a URL to redirect them back to the checkout. However this does require the customer to have accessed and interacted with the checkout at least once from a cart.

If you were not wanting to handle any back end apps and databases, then workaround 2 would probably be your best bet. Here’s some more info on how you could implement that in more detail.

On Storefront 1:

  • Create Customer Account Token and Cart
  • Uses Customer Account Token with Customer Account API to store the cart id in a metafield on the Customer object with the metafieldsSet mutation.

On Storefront 2.

  • Creates new Customer Account Token (each token is authenticated per storefront)
  • Uses Customer Account Token to retrieve the Customer object from the Storefront API, with a customer query

Here’s some additional documentation on using the Customer Account API with headless storefronts: