topic Re: FeatureSetBy functions are not defined in ArcGIS Online Questions

FeatureSetBy functions are not defined

ZhongmingAn — Tue, 07 Feb 2023 22:50:18 GMT

Hi,

I don't really use Arcade that much. Today when I tried to use the function "FeatureSetByRelationshipName" to get some values from one of my related tables, there was always this red marker on the right side and when I hover over the function, it suggested that the function "is not defined". I also tried this using "FeatureSetByName" function but it was also showing the same message. My lines were pretty simple:

var related = FeatureSetByRelationshipName($feature, 'related_table', [*], false)

return related

Do I have to do something to define some sort of variables before using these functions? Or are there any required libraries that have to be loaded?

Thanks!

Re: FeatureSetBy functions are not defined

jcarlson — Tue, 07 Feb 2023 22:58:46 GMT

It probably depends on the Profile you're using. Are you by chance attempting to use this for symbology? FeatureSet functions aren't available in the symbology profile.

Edit: here's the relevant post of the documentation: https://developers.arcgis.com/arcade/profiles/

Re: FeatureSetBy functions are not defined

ZhongmingAn — Wed, 08 Feb 2023 14:20:55 GMT

Well...that was where I tried adding the arcade expression. That explains it.

Thanks for the information!

Re: FeatureSetBy functions are not defined

EricaNova — Tue, 04 Nov 2025 14:35:02 GMT

I really, really wish the error messages were clearer. For example... when I hover over that red bar, it should give me a meaningful message like "this expression isn't supported here yet". Ugh.