DiscountApplicationStrategy.All is not a recognized option for new scaffolded product-discount

Retired Boards Appdev Functions

Topic summary

Issue: Developers attempting to use DiscountApplicationStrategy.All in product-discount Shopify Functions received an InvalidOutputError (discountApplicationStrategy expected non-null). Initial setups showed mixed API versions (app 2024-01 vs extension 2023-10), and manually updating the extension’s api_version didn’t resolve it.

Context: DiscountApplicationStrategy determines how multiple discounts combine (FIRST, MAXIMUM, ALL). Shopify’s changelog states ALL is supported from 2024-01 for the Product Discount Function API.

Guidance: A maintainer advised fully upgrading the extension to a newer API version and pulling the latest function schema per Shopify’s upgrade steps (ensuring the function’s schema reflects the new capabilities).

Follow-up: Another developer reported the same error on 2024-07, suggesting only FIRST and MAXIMUM were accepted despite updated dependencies and API version.

Latest outcome: The original poster confirmed that as of the April release, DiscountApplicationStrategy.All works. They shared a working return payload including discountApplicationStrategy: DiscountApplicationStrategy.All.

Status: Partially resolved. Evidence suggests ALL works with the updated schema/API post-April, but at least one user still experiences the null error. Key next step is confirming schema pull and function rebuild against the target API version.

Summarized with AI on December 25. AI used: gpt-5.
3

Hello!

I am experiencing an issue similar to the one described in this post regarding the use of the DiscountApplicationStrategy.All in Shopify Functions. Despite updating to the 2024-07 version as suggested in the solution, the problem persists.

The error message I’m encountering is:

[  {    "path": [      "discountApplicationStrategy"    ],
    "explanation": "Expected value to not be null"
  }
]

It appears that DiscountApplicationStrategy.All is still not recognized or correctly implemented. Shopify only seems to accept FIRST and MAXIMUM as valid options, not ALL.

have ensured that all dependencies are up-to-date and that I am indeed using the 2024-07 API version. Despite these efforts, the error persists, preventing the application of multiple discounts.

Any guidance or suggestions on resolving this issue would be greatly appreciated.