topic Re: Guid not generating in Field Maps? in ArcGIS Field Maps Questions

Guid not generating in Field Maps?

AaronSchuck1 — Thu, 30 May 2024 16:44:44 GMT

I have a feature class related to a table through the TRT_GUID field. The arcade expression below is entered into the field form, but the guid will not populate.

It's odd because the expression returns a field when tested, but nothing happens within field maps.

var ftrId = $feature.TRT_GUID; if (IsEmpty(ftrId) == True || ftrId == '{00000000-0000-0000-0000-000000000000}'){ ftrId = Guid(); return ftrId }

Re: Guid not generating in Field Maps?

AsimAhmad1 — Sat, 28 Sep 2024 18:27:31 GMT

I am also facing the same issue. Are you able to find a solution for this?

Re: Guid not generating in Field Maps?

CameronLacelle — Mon, 22 Dec 2025 18:46:12 GMT

@AaronSchuck1 @AsimAhmad1 Hello, not sure if either of you found a solution to this but it sounds similar to a problem I ran into today where I built a pp-up for a feature layer in ArcGIS Pro to call on the GlobalID to build a URL to show more info for a feature stored on my organization's intranet. The GlobalID string would never appear in the pop-up. Turns out ArcGIS Enterprise/Online doesn't seem to like the squiggly brackets ({}) that encompass the GUID. I threw in a "Replace()" function in the Arcade script to get rid of the brackets in my return statement and then it appeared as expected. So you could possibly use the following function:

var global_id = Replace(Replace($feature.GlobalID, '}', ''), '{', '')

If you do need the brackets in there, perhaps you could add them back in as some sort of concatenate? I haven't tested that though.

Re: Guid not generating in Field Maps?

JamesTurner2 — Thu, 23 Apr 2026 14:26:12 GMT

I just experienced this issue and did a little more research, it looks like there is an ESRI bug from Jan 2023. It is not marked as closed, but there is a solution presented that works. The Guid function on its own triggers an infinite loop. https://support.esri.com/en-us/bug/having-a-guid-function-arcade-expression-in-an-arcgis-f-bug-000153527

"...to calculate a random GUID, use the following expression and replace FIELDNAME with the name of the field: var id = $feature.FieldName IIf(id==null, guid(), id)"