topic Returned FeatureSet from data expression with domain relation? in ArcGIS Dashboards Questions

Returned FeatureSet from data expression with domain relation?

dstrigl — Wed, 08 Sep 2021 11:36:13 GMT

Dear Community,

I am playing around with the ArcGIS Dashboard and the data expression functionality ...

Now I am created a new FeatureSet using data expressions from an Layer with relation to a domain.

If I am presenting this FeatureSet in a list widget only the numeric values are presented and not the corresping domain values.

Is there a way to apply this domain to the new FeatureSet or any other recommended way?

Regards,

Daniel.

Re: Returned FeatureSet from data expression with domain relation?

jcarlson — Wed, 08 Sep 2021 13:34:08 GMT

Other Recommended Way

There is a way of applying the domain to another object, but since you're working directly with the layer, it would be easier to use DomainName while building your FeatureSet. I imagine you're iterating through the layer and populated the FeatureSet's Features array, so it might look like this:

// Assuming vars 'lyr' and 'out_dict' represent your input layer and output dictionary which will be converted to a FeatureSet, respectively var i = 0 for(var l in lyr){ out_dict['features'][i] = {attributes: {'domain_field': DomainName(l, 'domain_field')}} i ++ } fs = FeatureSet(Text(out_dict))

Applying a Domain to a FeatureSet

See the Arcade function Domain. If you use this on your layer first, it returns a dictionary representing the domain for a given field. The example on the linked page looks like this:

{
  type: "codedValue" ,
  name: "poleTypes",
  dataType: "number",
  codedValues: [
    { name: "Unknown", code: 0 },
    { name: "Wood", code: 1 },
    { name: "Steel", code: 2 }
  ]
}

When creating the FeatureSet (or rather, the dictionary that will become your FeatureSet), you establish the fields array. Within a given field, you can simply append the domain returned from this function, as the domain is a property of a field. This can be done before populating the features.

// Assuming var 'lyr' is your input layer var dom = Domain(lyr, 'domain_field') var out_dict = { 'fields': [{ 'name': 'domain_field', 'type': 'esriFieldTypeInteger', 'domain': dom }], 'geometryType': '', 'features': [] } // Populate your FeatureSet as usual, domain should apply

Re: Returned FeatureSet from data expression with domain relation?

dstrigl — Thu, 09 Sep 2021 07:08:53 GMT

Hi @jcarlson,

thanks a lot for your help.

The way with the DomainName() function is exactly what I am trying now:

But this seems to doesn't work in my sample 😞

Additionally I tested the following:

var fs = FeatureSetByPortalItem(...); Console("ACCOUNT_MANAGER:"); for (var f in fs) { var d = DomainName(f, "ACCOUNT_MANAGER"); Console(d); }

and I only get the numeric values and NOT the names represented by the domain!

ACCOUNT_MANAGER: 4 2 2 4 4 . . .

Do you have any idea what's wrong?

The names are still in the layer, because if I open the table inside the Map Viewer I will see it ...

Some note: Could it be a problem that the table which includes the ACCOUNT_MANAGER has a subtype?

Regards,

Daniel.

Re: Returned FeatureSet from data expression with domain relation?

mikaël — Wed, 31 Jan 2024 17:01:14 GMT

I know this is an old thread but I had the same problem. The field which had a domain is type "esriFieldTypeInteger" (names are strings and codes are integers). So what I ended up doing was create a new "esriFieldTypeString" field with arcade and pushing the DomainName to that field.

So basically, in a loop where l is the iteration in layer: (dictionary(l)).attributes["new_field"] = domainname(l, "domain_field").