Arcade in map viewer error - unique ID

[Laura]

I am trying to create arcade for my TREE ID. I have some IDs currently, but would like it to auto calculate a new ID that comes next in line when another record is creating. My code does not have an output. Any ideas?

var fset = FeatureSetByName($map,

'Tree Inventory',

['TREEID'],

false

);

var fset_sorted = OrderBy(fset, 'TREEID DESC');

var firstRow = First(fset_sorted);

var highestID = firstRow.TREEID;

var newID = highestID + 1;

if($originalFeature{'TREEID'} > 0){

  return $originalFeature{'TREEID'}

} else {

  return newID

}

This arcade is copied from a CloudPoint Geospatial video. 

[Omar_A]

Hi,

Ensure your FeatureSetByName function call is syntactically correct. You are missing a comma before the false
parameter. Also, It's good practice to include some form of error handling or checking to ensure that your script can handle unexpected situations , such as when there are no features in the feature set.

[Amir-Sarrafzadeh-Arasi]

Dear Laura,

I think if you want to access a field of a Feature you should use one of these ways:

1) $Feature.fieldname

2) $Feature['fieldname']

and I am not surehere you can use $originalFeature.