Exclude empty field from pop-up with custom order using arcade expression in Field Maps

[range97]

Hi there, 

I have fields in my forms that are not relevant/used during every form submission. I would like to exclude empty fields from the popups and always exclude data not relevant to viewer such as OBJECTID, EditDate, Creator, GlobalID, CreationDate, Editor etc. 

I found an expression from another community post and input the fields I wanted excluded: 

var attributes = Dictionary($feature)["attributes"];

var fieldInfos = [];

var attributeValues = {};

var excludeFields = ["OBJECTID", "EditDate", "Creator", "GlobalID", "CreationDate", "Editor"];

for (var key in attributes) {

var value = attributes[key];

if (!IsEmpty(value) && value != "" && IndexOf(excludeFields, key) == -1) {

Push(fieldInfos, { fieldName: key });

attributeValues[key] = value;

}

}

return {

type: 'fields',

fieldInfos: fieldInfos,

attributes: attributeValues

};

This had the intended effect of hiding irrelevant and empty fields.  

I need to also control the order in which the returned visible fields are displayed. This expression is currently returning the fields in alphabetical order. I need to have the same three fields displayed at the top of the pop up in the following order for every submission: HMA, Observation Date and Time, and Type. I do not care about the order of the other 5-8 fields that would be displayed. Ideally I would like to order the popup in the same display order of the collector forms. 

I am not sure how to proceed. I have tried several alternatives and I am not getting the result I intend. 

[KenBuja]

To maintain the order of the fields, you have to get the schema of the feature. Try this code, which returns the field alias and domain name (if the field has a domain)

var fields = Schema($feature).fields;

var fieldInfos = [];
var attributes = {};

var excludeFields = [
  "OBJECTID",
  "EditDate",
  "Creator",
  "GlobalID",
  "CreationDate",
  "Editor"
];

for (var field of fields) {
  var key = field.alias;
  var value = DomainName($feature, field.name);
  if (!IsEmpty(value) && value != "" && IndexOf(excludeFields, key) == -1) {
    Push(fieldInfos, { fieldName: key });
    attributes[key] = value;
  }
}
return { type: "fields", fieldInfos: fieldInfos, attributes: attributes };

[range97]

Thank you for your response! I am still new to using Arcade Expressions. 

When I first tried the expression the pop up window populates with data. After saving and clicking off the current point to a different point on the same layer all the pop ups are blank. The only way I can get the expression to display anything in the popup window now is to have a field list as well as the arcade expression which is now displaying the block of fields from the arcade expression and the field list in a separate block below. If I remove the field list it returns a blank popup window. I think I am doing something wrong. 

Any ideas? When I tried looking for solutions to this blank popup issue it looks like I need to use the Expect function but not sure how I would go about that. 

[KenBuja · Accepted solution]

Thanks for pointing that out. I did leave off the Expects function at the top of the code. All you need to do is add this as the first line

Expects($feature, "*");

[range97]

Thank you so much for the help! Now it is behaving exactly as I had hoped. I don't think I would have thought to add it to the first line. I had tried it at the end of the string. You have been such a great help, I greatly appreciation for your generosity. Hopefully this also aids someone else.