Attribute Rule Arcade Intersect and Copy Attribute from Feature A to B Error: Indexable type expected

Ed_

Hello all,

Hope all is well, so i need some Arcade help 🙂

• Let's say I have a point feature class which is empty and will be digitized via Field Maps.
• The map will also contain a polygon layer ,and one of its attribute is say "attribute_ABC" and has values. 
• The point layer will also have attribute "attribute_ABC" which would initially be empty, so i am trying to create an attribute rule for it.
• whenever the point intersects the polygon layer, it copies the respective attribute_ABC value from the polygon layer to the point layer attribute_ABC.
• Basically the idea is to auto populate some of the attributes of the point feature class from other existing layers based on their intersection.

So I finally got the code working to the point that code block says that "Expression is valid" but when I try to add a point to the map, I get the following error 

Error:

 

Failed to create Pt.
Failed to evaluate Arcade expression. [
Rule name: Poly,
Triggering event: Insert,
Class name: Pt,
GlobalID: {4E52CA0C-099D-4593-80AF-292A5CFE51CF},
Arcade error: Indexable type expected,
Script line: 11]

 

Code:

 

 

// Read the polygon layer
var poly =  FeatureSetByName($datastore, "poly");

// Intersect
var int = Intersects(poly, $feature);

// Check if there is an intersection
if (Count(int) > 0) {
// Get the first intersecting polygon's ABC value
   var firstPoly = First(int);
   return int.ABC;
 } else {
// if there's no intersection then retain the original ABC value or return null
   return $feature.ABC;
}

 

 

 

PS the map is being created in Pro 3.3.1 which will then published to AGOL and then that map will be used in Field Maps.

 

 

 

 

 

 

kenbuja

Line 10 should be

return firstPoly.ABC;