Not able to query related record

Question

Dear All

I want to query related record of a feature during identify using ArcGIS Javascript API 3.5
This is how I am working on it:
var relatedQuery = new esri.tasks.RelationshipQuery(); 
          relatedQuery.outFields = ["*"]; 
          relatedQuery.relationshipId = 1; 
          relatedQuery.objectIds  = 2102;
        var layerinfo = baseLayer.layerInfos;
        
    //   map.layerIds
        var layer = layerinfo[4];
         
            layer.queryRelatedFeatures(relatedQuery, function(relatedRecords) { 
            alert("related");

})

but it gives error that "the object doesnot support this property or method". I have multiple mapservices in my map.
Please help!

Thanks
Deepika

JasonZou · Answer

var layerinfo = baseLayer.layerInfos;

// map.layerIds
var layer = layerinfo[4];

layer.queryRelatedFeatures(relatedQuery, function(relatedRecords) {

layerInfo cannot be used to query related records. Two options:* Use QueryTask.executeRelationshipQuery(parameters,callback?,errback?)
* Create a feature layer for layerinfo[4], and then queryRelatedFeatures(relQuery,callback?,errback?). Sample.

VinayBansal · Answer

Hi Thanls for the help, I tired the workaround but still I get the same error. Is it that the task works only for feature service layers and not for map service layers. The related data is there in the same mxd which is published as a service and if I query through REST endpoint, I do get the results. Yes queryRelatedFeatures works for FeatureLayer. var relatedQuery = new esri.tasks.RelationshipQuery(); relatedQuery.objectIds = [2012]; relatedQuery.outFields = ["*"]; relatedQuery.relationshipId = 1; relatedQuery.returnGeometry = false; var myFeatureLayer = new esri.layers.FeatureLayer(<> + "/" + <>, { mode: esri.layers.FeatureLayer.MODE_SELECTION }); myFeatureLayer .queryRelatedFeatures(relatedQuery, function (relatedRecords) { //Code after records are found });

DeepikaJain · Answer

Hi

Thanls for the help, I tired the workaround but still I get the same error. Is it that the task works only for feature service layers and not for map service layers. The related data is there in the same mxd which is published as a service and if I query through REST endpoint, I do get the results.