Here is code I came up with to execute my conceptual design above. Right now it is throwing a reference error on the queryX callback function. stating that "addPointsToMapX is undefined"Any thoughts?
!DOCTYPE html>
<html>
<head>
<title>Create a Map</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
<link rel="stylesheet" href="http://js.arcgis.com/3.7/js/dojo/dijit/themes/claro/claro.css">
<link rel="stylesheet" href="http://js.arcgis.com/3.7/js/esri/css/esri.css">
<style>
html, body, #mapDiv {
padding: 0;
margin: 0;
height: 100%;
}
</style>
<script src="http://js.arcgis.com/3.8/"></script>
<script>
// Initializes map
var map, defPopSymbol;
require(["esri/map", "esri/tasks/query", "esri/tasks/QueryTask", "esri/symbols/SimpleMarkerSymbol", "esri/InfoTemplate", "dojo/_base/Color", "dojo/domReady!"],
function(Map, Query, QueryTask, SimpleMarkerSymbol, InfoTemplate, Color) {
map = new Map("mapDiv", {
basemap: "streets",
center: [-75.498,42.981], // long, lat
zoom: 6,
sliderStyle: "small"
});
// Delcare the output array of query 1
var SchoolID = new Array ();
SchoolPopSymbol = new SimpleMarkerSymbol().setColor(new Color([255,255,128, .85]));
// Query 1 the related to get campus IDs of program
var queryTask = new QueryTask("http://w7hp348/arcgis/rest/services/Testservice/XTest/MapServer/1"+ "?returnDistinctValues=true");
var query = new Query();
query.where = "Academic_Program_Name = 'Biology'";
query.returnGeometry = false;
query.outFields = ["Primary_SUNY_Institution_ID"];
queryTask.execute(query, GetSchoolID);
// Initialize query 2 which takes IDs obtained from query 1 and queries the Campus layer
var queryTaskX = new QueryTask("http://w7hp348/arcgis/rest/services/Testservice/XTest/MapServer/0");
var queryX = new Query();
queryX.returnGeometry = true;
queryX.outfields = ["CampusName"];
queryX.where = "SUNY_INSTITUTION_CODE = " + SchoolID;
queryTaskX.execute(queryX, addPointsToMapX);
// callback of query 1 populates "SchoolID" and fires query 2
function GetSchoolID(featureSet) {
var features = featureSet.features;
var feature;
for (var i=0, il=features.length; i<il; i++) {
feature = features;
SchoolID = featureSet.features.attributes["Primary_SUNY_Institution_ID"];
}
function addPointsToMapX(featureSet) {
var featuresX = featureSet.features;
var featureX;
for (var i=0, il=featuresX.length; i<il; i++) {
featureX = featuresX;
map.graphics.add(featuresX.setSymbol(SchoolPopSymbol));
console.log(featureX.length);
}
}
}
});
</script>
</head>
<body class="claro">
<div id="mapDiv"></div>
</body>
</html>
