Handle discounts via the Storefront API

[marm_alex]

Hello everyone!

I'm working on one of our clients shops where we use the Shopify Storefront API to interact with the checkout. I have some questions regarding how discounts are handled via the Storefront API:

1. According to the documentation, the Checkout object (https://shopify.dev/api/storefront/reference/checkouts/checkout)  has a connection for discountApplications (https://shopify.dev/api/storefront/reference/checkouts/discountapplication).

As far as I understand there is no title/code field on the DiscountApplication Object.

Is it possible to get the title/code of submitted discounts for the checkout? I need these information to show the customer what discounts are active for the checkout.

2. Regarding the documentation the is a mutation to remove discounts from the checkout: https://shopify.dev/api/storefront/reference/checkouts/checkoutdiscountcoderemove

This will remove *all* discounts from the checkout. Is there a way to remove a specific discount?

I appreciate any help 🙂

[CalD · Accepted solution]

Hey @marm_alex,

Have you seen the code property on the DiscountCodeApplication object?

You should be able to use a fragment on the checkout's discountApplications (i.e. ... on DiscountCodeApplication) to query the applied discount codes. Here's an example:

{
  node(id: "Z2lkOi8vc...kxZjM=") {
    id
    ... on Checkout {
      id
      ready
      discountApplications(first: 5) {
        edges {
          node {
            ... on DiscountCodeApplication {
              allocationMethod
              applicable
              targetType
              targetSelection
              code
              value {
                ... on MoneyV2 {
                    amount
                    currencyCode
                  }
              }
            }

          }
        }
      }
}
}
}

and the response:

{
	"data": {
		"node": {
			"id": "Z2lkOi8vc...kxZjM=",
			"ready": true,
			"discountApplications": {
				"edges": [{
					"node": {
						"allocationMethod": "ACROSS",
						"applicable": false,
						"targetType": "LINE_ITEM",
						"targetSelection": "ALL",
						"code": "TESTCODE-15OFF",
						"value": {}
					}
				}]
			}
		}
	}
}

Regarding your second point - it isn't possible to remove only one specific discount.

[marm_alex]

Hello @CalD . Thanks for your answer. The first part helped me a lot! I just overlooked the "code" part in the documenation. Thanks for the hint!

To the second part: Are there any plans to allow to remove specific discounts via API in the future?