topic Re: QueryTask and coded domain values in ArcGIS JavaScript Maps SDK Questions

QueryTask and coded domain values

WilliamMeredith — Wed, 25 Feb 2015 22:50:06 GMT

Is it possible to return coded domain values using QueryTask in the JavaScript API? FindTask seems to do it ok, no luck with QueryTask.

Re: QueryTask and coded domain values

RobertScheitlin__GISP — Sat, 11 Dec 2021 06:15:57 GMT

William,

Query Task does not do this for you. You as the developer have to get the coded values in code.

Here is a snippet function that I use in some widgets.

     _getCodedValue: function (layer, fieldName, fieldValue, typeID) {
        var result;
        var codedValueDomain;
        if (typeID) {
          var featureType = this._getFeatureType(layer, typeID);
          if (featureType) {
            codedValueDomain = featureType.domains[fieldName];
          }
        } else {
          var field = this._getField(layer, fieldName);
          if (field) {
            codedValueDomain = field.domain;
          }
        }
        if (codedValueDomain) {
          if(codedValueDomain.type === 'codedValue'){
            for (var cv = 0; cv < codedValueDomain.codedValues.length; cv++) {
              var codedValue = codedValueDomain.codedValues[cv];
              if (fieldValue === codedValue.code) {
                result = codedValue;
                break;
              }
            }
          }
        }
        return result;
      }

Re: QueryTask and coded domain values

WilliamMeredith — Fri, 27 Feb 2015 19:00:57 GMT

Thanks Robert. Works for my needs.

Billy

Re: QueryTask and coded domain values

RoxanneWilson — Mon, 23 May 2016 19:22:01 GMT

Robert,

I was going to try using this code snippet in my existing code. As I've got zero coding experience and this is my first web map, I'm not sure what text do I change in your snippet and to what to make it work with my data. I have a field called Make, that has a domain applied to it called CCTVmakes. It's setup so 1=Make X and 2= Make Y, etc...

Thanks.

Re: QueryTask and coded domain values

RobertScheitlin__GISP — Mon, 23 May 2016 20:00:25 GMT

Roxanne,

Are you developing a JS app or something in WAB?

If it is for Native JS API app then you just need to change the function signature to this:

function _getCodedValue(layer, fieldName, fieldValue, typeID) {

Then in your code use the function by providing the appropriate function parameters

var codedValue = _getCodedValue(yourlayerobject, "your field name", theCurrentFieldValue, theTypeIDifyourfieldusesasubtype);

Re: QueryTask and coded domain values

RoxanneWilson — Tue, 24 May 2016 15:03:15 GMT

It is for a native JS API and not WAB. But you've lost me on the explanation part.

Re: QueryTask and coded domain values

RobertScheitlin__GISP — Tue, 24 May 2016 15:20:39 GMT

Roxanne,

I am not sure I can break it down any further. The code provided is a basic JS function that you call from your code providing all the required parameters of the function.

Re: QueryTask and coded domain values

RoxanneWilson — Tue, 24 May 2016 17:13:24 GMT

When I have this typed, I get the error that getCodedValue is undefined.

function_getCodedValue (layer, fieldname, fieldValue);

var codedValue = _getCodedValue (VideoCamera, Make);

Re: QueryTask and coded domain values

RobertScheitlin__GISP — Tue, 24 May 2016 17:25:33 GMT

Roxanne,

OK, here is the issue.

This is the whole function:

function _getCodedValue(layer, fieldName, fieldValue, typeID) {

var result;

var codedValueDomain;

if (typeID) {

var featureType = this._getFeatureType(layer, typeID);

if (featureType) {

codedValueDomain = featureType.domains[fieldName];

}

} else {

var field = this._getField(layer, fieldName);

if (field) {

codedValueDomain = field.domain;

}

if (codedValueDomain) {

if(codedValueDomain.type === 'codedValue'){

for (var cv = 0; cv < codedValueDomain.codedValues.length; cv++) {

var codedValue = codedValueDomain.codedValues[cv];

if (fieldValue === codedValue.code) {

result = codedValue;

break;

}

return result;

}

and this is how you call it:

var codedValue = _getCodedValue (VideoCamera, "The field name as a string", "this is the value you have for that fields attribute");

Re: QueryTask and coded domain values

RoxanneWilson — Wed, 25 May 2016 16:25:07 GMT

Could I simplify that and just create a function that says something like if Make=1, return Axis. else if make =2, return Vicon?

I attempted, but my syntax isn't right. And I've never dealt with function or if/else statements.

function MakeValue

if (Make =1){

return "Axis";

} else {

if (Make =2){

return "Vicon";

};

Re: QueryTask and coded domain values

RobertScheitlin__GISP — Wed, 25 May 2016 16:39:13 GMT

Roxanne,

If is going to be a definite learning curve for you as I can see you don't even understand the basics of writing a function. You really need to do some Googling on JS Basics.

JavaScript 101, Beginner's Guide to Learning Block / Inline JavaScript

The function you are attempting should look like:

function getMake(Make){

if (Make === 1){

return "Axis";

} else if (Make === 2){

return "Vicon";

};

}

Re: QueryTask and coded domain values

RoxanneWilson — Wed, 25 May 2016 16:59:14 GMT

I've got zero experience with coding or javascript. So to say this project has been a bit of a learning curve, is a bit of an understatement.

I appreciate you correcting the issue with my function code. Just one last question. With another function that is in the template, the function was create like:

SetImage = function (value, key, data), etc...

Then in the popup I was able to reference the SetImage function to display an image instead of the file value. When I put the getMake function in the popup, it doesn't return the values Axis or Vicon. Is that because the getMake function doesn't have the = ? And since it doesn't, am I still able to reference that function so it shows Vicon or Axis in the popup instead of 1 or 2?

Re: QueryTask and coded domain values

RobertScheitlin__GISP — Wed, 25 May 2016 17:07:38 GMT

Roxanne,

Correct, it would have to be:

var getMake = function(Make){

if (Make === 1){

return "Axis";

} else if (Make === 2){

return "Vicon";

};

}

Re: QueryTask and coded domain values

ahmed_hussiney — Thu, 24 Sep 2020 09:35:20 GMT

Another way to do this , in the query task result you can find the field information including domain information if the field is assigned to domian, Then you can get each coded domain value and update the query result with domain instead of the code.

var domain = queryResults.featureSet.fields["Your Field Index"].domain;

var codedValues = domain.codedValues;