Displaying related records in popup using ArcGIS JavaScript API?

Question

I am attempting to display related fields in a popup window. I've created a GraphicsLayer, consisting of features from the results of a QueryTask. Upon adding the features to the GraphicsLayer, I am assigning a popupTemplate to each feature:

var popupTemplate = {
 title: "<b>{LONGNAME}</b>",
 content: [{
 type: "fields",
 fieldInfos: [{
 fieldName: "SPACEID",
 label: "Space Identifier",
 visible: true
 },{
 fieldName: "relationships/1/VERTICALORDER",
 label: "Vertical Order",
 visible: true
 }]
 }]
};

However, this technique does not seem to be able to reference the related table. The [SPACEID] field value is visible, but the related field value is not. Am I doing something wrong, or is there a different way to accomplish this?

EDIT: Perhaps this functionality is not possible yet? I've tested this with a simple FeatureLayer, and the relationship is not honored.

var layer = new FeatureLayer({
 url: baseURL + "/2",
 popupTemplate: { // autocasts as new PopupTemplate()
 title: "<b>{LONGNAME}</b>",
 content: [{
 type: "fields",
 fieldInfos: [{
 fieldName: "SPACEID",
 label: "Space Identifier",
 visible: true
 },{
 fieldName: "relationships/3/FIRSTNAME",
 label: "Employee Name",
 visible: true
 }]
 }]
 }
});

I have verified the relationship is functioning, using the REST queryRelatedRecords window. However the FeatureLayer does not see the table. Is there something further that needs to be done? I should note that the service is a MapService, in case that matters.

This issue is discussed here and elsewhere.

Answer 1

fieldName: "relationships/1/VERTICALORDER" means that have created a second RelationShip in your GraphicLayer.

If you didn't, (otherwise you would have post the code) then you have two options :

• build a RelationQuery https://developers.arcgis.com/javascript/latest/api-reference/esri-tasks-support-RelationshipQuery.html to add its results to your features, so you'll get a new field VERTICALORDER

• build a RelationShip https://developers.arcgis.com/javascript/latest/api-reference/esri-layers-support-Relationship.html to your GraphicLayer

• Barbarossa: I have a relationship for the MapService layer from which the features used to create the GraphicLayer came from. The GraphicLayer doesn't, as far as I can tell, have any relationships. Can you elaborate on how one would create a new relationship?