How do I reference a layer in my TOC in an Arcade Expression in Pro for symbology

LoriEmerson_McCormack — Mon, 20 Dec 2021 21:43:00 GMT

The Arcade expression below works in ArcGIS Online. How do I get the Arcade expression to work in ArcGIS Pro before publishing my map service map to be used in ArcGIS API for JavaScript? I get an error saying "Invalid expression. Error on line 2. Object not found $map)." I also tried $datastore instead of $map. When I use $datastore, do I need to list the entire path to the feature class?

I am trying to find the max RatingDate for each RoadID, so the symbology displays the PSC for the most current rating date.

var currentFeatureRoadID = $feature.RoadID
var featuresSurfCond = FeatureSetByName($map,'Surface Condition', ['RoadID', 'RatingDate', 'PSC'], true);
var featuresSurfCondFilter = Filter(featuresSurfCond, 'RoadID = @currentFeatureRoadID')
var maxRatingDate = max(featuresSurfCondFilter, 'RatingDate')
if ($feature.RatingDate == maxRatingDate) {
return $feature.PSC
}

Re: How do I reference a layer in my TOC in an Arcade Expression in Pro for symbology

jcarlson — Mon, 20 Dec 2021 22:05:35 GMT

The short answer: you don't!

Arcade has a number of different profiles, each with different capabilities. The symbology profile in particular does not allow accessing other layers, either in the datastore or the map.

topic Re: How do I reference a layer in my TOC in an Arcade Expression in Pro for symbology in ArcGIS Pro Questions

How do I reference a layer in my TOC in an Arcade Expression in Pro for symbology

Re: How do I reference a layer in my TOC in an Arcade Expression in Pro for symbology