Arcade GroupBy Function Error: Aggregation field not found. Verify test data.

ZacStanleyNPS

Hello,

I'm hoping what I have is simple issue someone can see easier than me. I'm simply trying to aggregate trail names and sum their segment lengths to display in a dashboard list:

 

var portal = Portal('https://www.arcgis.com/'); 
var fs = FeatureSetByPortalItem(Portal,
  '7b1fb95ab77f40bf8aa09c8b59045449',
  0,
  [ 
    'TRLNAME',
    'LengthMiles'
  ], 
    False //don’t include geometry 
); 
return GroupBy(fs, 'TRLNAME', { name: 'LengthMilesSum', expression: 'LengthMiles', statistic: 'SUM' });

 

The expression as is returns the error: Test execution error: Aggregation field not found. Verify test data.

I've tested enough to know that the error is in the group by function. Would love any help / tips.

Thanks!

jcarlson

There it is! You can see it in the URL:

sublayer=10

Change that to a 10 and it works!