Combine SKU numbers for prepacked fulfillment

Retired Boards Appdev Fulfillment Api

Topic summary

Need to map multiple SKUs in the cart (e.g., SKU:001 + SKU:002) to a single fulfillment SKU (SKU:003) for prepacked combo products. Existing bundle apps create new products instead of converting cart SKUs into one backend SKU.

Key constraints and workaround:

  • SKUs cannot be changed dynamically in orders.
  • Workaround: compute a “combined SKU” and store it in order notes or cart attributes, implemented via Liquid or Shopify Functions (custom app code).
  • Terms: SKU = stock keeping unit; cart attributes = custom metadata attached to a cart; Shopify Functions = custom app functionality to modify commerce logic.

Follow-up: The requester couldn’t implement the notes/attributes approach via settings alone and only found customer-editable order notes. They lack programming skills; custom build via Experts was quoted as costly.

Current status/outcome:

  • No built-in or settings-only solution to merge SKUs into one on the backend.
  • Proposed approach requires a developer to implement custom Liquid/Functions logic.
  • Thread remains open without a turnkey resolution.
Summarized with AI on January 21. AI used: gpt-5.
4

Hello Scott,

I tried the options that you suggested, but unfortunately, I didn’t find how to do this.

I looked for the option to add calculated SKU in the order notes or cart attributes. But i can not find out how to do this. the only thing i find is that you can add a order note so customers can add some text to the order.
Can you explain in more detail how to use this option to calculated SKU in the order notes or cart attributes?

For the functions i found that this means making a custom app for shopify. i dont have any programing scills so i think this is not the best option for me. i placed a request for someone to build this on shopify experts but the price for this is realy hi.

I hope you can help me out by explaining the order calculated notes.

Thank you for helping.