---
title: >-
  The Storefront API's Cart object now exposes warnings for non-applicable
  discount codes - Shopify developer changelog
description: >-
  Shopify’s developer changelog documents all changes to Shopify’s platform.
  Find the latest news and learn about new platform opportunities.
source_url:
  html: 'https://shopify.dev/changelog/add-warnings-for-discount-codes'
  md: 'https://shopify.dev/changelog/add-warnings-for-discount-codes.md'
metadata:
  effectiveApiVersion: 2025-07
  affectedApi:
    - displayName: Storefront GraphQL API
      handle: storefront-graphql
  primaryTag:
    displayName: API
    handle: api
  secondaryTag:
    displayName: New
    handle: new
  indicatesActionRequired: false
  createdAt: '2025-05-12T13:26:36-04:00'
  postedAt: '2025-05-22T12:00:00-04:00'
  updatedAt: '2025-05-16T14:06:09-04:00'
  effectiveAt: '2025-05-19T12:00:00-04:00'
---

May 22, 2025

Tags:

* Storefront GraphQL API
* 2025-07

# The Storefront API's Cart object now exposes warnings for non-applicable discount codes

As of version 2025-07 of the GraphQL Storefront API, the `Cart` object now provides detailed warnings for non-applicable [`CartDiscountCodes`](https://shopify.dev/docs/api/storefront/latest/objects/CartDiscountCode).

Previously, when a discount code could not be applied, the `CartDiscountCode` was returned with `applicable: false`, and no additional details. This lack of information made it difficult for developers to provide helpful feedback to buyers.

With the introduction of the new [`CartWarning`](https://shopify.dev/docs/api/storefront/2025-07/objects/CartWarning) types, you can now clearly identify the specific reasons why a discount code isn't applicable.