Arcade Expression Not Returning Anything in Pop-up in Some Scenarios.

MollyMoore — Mon, 29 Sep 2025 17:18:38 GMT

I am using an Arcade expression with HTML to format a feature layer pop-up in a web map. The format looks great, but for several features, the pop-up is just blank - without even the heading attributes that are populated for all features. In some cases, the features do not have related records and/or images - I thought I accounted for that with if statements. I think this issue seems to be occurring when there are no related site account records. Can anyone see anything wrong with the code that would be making this occur?

// first get heading with attributes from selected feature var output = ""+$feature.site_name+" NHA " output += "A site of "+$feature.sig_rank+" significance." // this is pulling in the attachment and displaying var attach = Attachments($feature) if(Count(attach) != 0) { var Part1 = "https://services2.arcgis.com/REST SERVICE URL" var ObjectID = $feature.OBJECTID var Part2 = "/attachments/" var AttachID = First(attach).ID var img_path = Part1 + ObjectID + Part2 + AttachID var img_caption = $feature.photo_caption output += "<img src="+img_path+"> "+img_caption+"" } // get site description and tr summary var related_site = FeatureSetByRelationshipName($feature, "Site_Accounts", ["site_desc","tr_summary"]); if (!IsEmpty(related_site)) { var firstRel = First(related_site); var desc = firstRel["site_desc"]; output += ""+desc+"" var tr_summ = firstRel["tr_summary"] if(!IsEmpty(tr_summ)) { output += "Threats and Recommendations " output += ""+tr_summ+"" } } // Get the related features var relatedRecords = FeatureSetByRelationshipName($feature, "Threats_and_Recommendation_Bullets", ["threat_text"]); // Check if any related records exist if (Count(relatedRecords) > 0) { // Start an HTML unordered list output += "Specific threats and stresses to the elements present at this site, as well as conservation actions, include: <ul>"; // Loop through each related record for (var record in relatedRecords) { // Add a list item with the attributes you want to display output += "<li>" + record.threat_text + "</li>"; } output+= "</ul>" } return { type : 'text', text : output //this property supports html tags };

Re: Arcade Expression Not Returning Anything in Pop-up in Some Scenarios.

KenBuja — Tue, 30 Sep 2025 14:43:41 GMT

Lines 20 tests whether a relationship exists, not whether there are records in the relationship. The code fails when you try to access a field from a null in line 22

You'll have to test whether that relationship has any records.

if (Count(related_site) > 0) {

Re: Arcade Expression Not Returning Anything in Pop-up in Some Scenarios.

MollyMoore — Tue, 30 Sep 2025 15:06:54 GMT

Thank you, this fixed the issue! Thanks for catching the problem and for the solution!

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Arcade Expression Not Returning Anything in Pop-up in Some Scenarios.

Re: Arcade Expression Not Returning Anything in Pop-up in Some Scenarios.

Re: Arcade Expression Not Returning Anything in Pop-up in Some Scenarios.