Check if - 5,000 entries

Shopify Plus
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Topic summary

Goal: Validate whether a customer’s postcode is contained within a large set (~5,000) using Shopify Flow, where the “Check if… at least one of” condition can’t handle so many entries.

Suggested approach: Use shop metafields (or metaobjects) to store the list of postcodes instead of hard-coding them in Flow. A postcode should be stored as a string; use a list of strings with one postcode per item.

How-to:

  • Create a shop metafield of type list of strings and populate it with the 5,000 postcodes. Note: Shopify currently has no native UI to set shop-level metafields; use a free app (e.g., Metafields Guru) to create and fill it.
  • In Flow, add “Shop / Metafield (requires arguments)” to reference that metafield in your workflow.
  • In your condition, use the metafield list. If necessary, loop over the list and compare the customer’s zip to each item.

Status: A workable method is outlined (metafield-based). No confirmation of implementation success yet; discussion remains open.

Summarized with AI on December 24. AI used: gpt-5.
1

Good afternoon

I would like to check if a postcode is within a list of 5,000. How can I do that?

I do not seem to be able to add 5,000 entries to the Check if… statement?

Many thanks

2

Usually when a list gets huge, I’d recommend using metafields or metaobjects instead. For example, you could create a shop metafield and put all you zips in there, and then you can use that metafield in your Flow workflow.

3

Thank you Paul.

Once I’ve created the shop metafield with the postcode values, how can I use this data in flow?

When I try to do Check if, Customer Zip is at least one of … it does not seem to let me compare it to a shop metafield value?

Many thanks

4

It depends on the type of metafield you add. A zip is stored as a string, so I would use a string or list of strings (with one zip per item in the list).

Once you have that set up, you can add the metafield to flow by going to “shop / metafield (requires arguments)”. There, you’ll be able to choose that metafield. If you use a list, you’ll probably want to add that first in a condition (because you need to loop over the list). Then add the whichever zip as the second part of the condition.

FYI, there’s isn’t yet a UI to set shop metafields…but there are some free apps that allow it like “metafields guru”.