Arcade expression returns value in popup in Map Viewer Classic but not Map Viewer

kenbuja

In Map Viewer, I had created an expression to return a list of fields. I check whether the field has the expected prefix ('MAX') and whether its value is equal to 1. I push the field alias into an array and return the return concatenated array.

 

var theSchema = Schema($feature);
var fields = theSchema['fields'];
var species = [];
for (var i in fields) {
   if (Find('MAX', fields[i]['name']) > -1 && $feature[fields[i]['name']] == 1) {
      Push(species,fields[i]['alias']);
   }
}
return Concatenate(species,', ');

 

In the Expression editor, this runs properly and returns the expected result.

I use this expression in the Text content

There are {Sum} corals species predicted or confirmed in the {ECOREGION} ecoregion in the {PROVINCE} province: {expression/expr0} 

However, this expression does not display in the Map Viewer popup.

Curiously, it does show up in Map Viewer Classic

Why doesn't it show in Map Viewer?

AnneFitz

Hi @KenBuja - thanks for providing some more info! I think it should work if you add Expects($feature, 'MAX*') at the beginning of your expression. The Expects function makes sure you have all the fields related to your expression available on the client. By default, only the fields used to visualize your data are available. For more information, check out the documentation for the Expects function. Let me know if this works for you!