topic Re: DefinitionExpression with MapImageLayer subLayer in ArcGIS JavaScript Maps SDK Questions

DefinitionExpression with MapImageLayer subLayer

RandyBonds_Jr_ — Sat, 11 Dec 2021 06:43:27 GMT

I'm having trouble with a complex definitionExpression in a sublayer of my MapImageLayer (JSAPI 4.2). When I do the same query from the REST service directory, it works perfectly.

More or less, I want a date range and either of two other field values to be 1. What happens is that the points are all shown, but only the ones that match the query have a popup... it's really neat.

Here's my code

        var layer = new MapImageLayer({
          url: "https://gis.yakimawa.gov/arcgis101/rest/services/CouncilDistricts/ElementarySchoolSidewalksAnalysis/MapServer",
          sublayers: [
          {
            id: 4,
            visible: true,
            definitionExpression: "Type = 1",
            popupTemplate: template
          }, {
            id: 3,
            visible: true
          }, {
            id: 2,
            visible: true,
            popupTemplate: streetTemplate
          },{
            id: 1,
            visible: true,
            popupTemplate: streetTemplate
          }, {
            id: 0,
            visible: false,
            definitionExpression: "(Collision_Date <= date '2016-12-31 23:59:59' AND Collision_Date >= date '2014-01-01 00:00:00') AND (Number_of_Pedestrians_Involved > 0 OR Number_of_Pedalcyclists_Involve > 0)",
            popupTemplate: collisionTemplate
          }]
        });‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Re: DefinitionExpression with MapImageLayer subLayer

KristianEkenes — Sat, 11 Dec 2021 06:43:30 GMT

Hi Randy,

This is a bug we weren't aware of. So thanks for asking about it. This is actually already fixed for our next release. In the meantime you can use the following code to patch your app.

// TODO remove when upgrading to 4.3
function patchMapImageLayer(layer) {
  var original = layer.createExportImageParameters;
  layer.createExportImageParameters = function(options) {
    var params = original.call(layer, options);
    var layerDefs = params.layerDefs.split(";").reduce(function(result, layerDef) {
      var firstColon = layerDef.indexOf(":");
      var layerId = parseInt(layerDef.slice(0, firstColon));
      result[layerId] = layerDef.slice(firstColon + 1);
      return result
    }, {});
    params.layerDefs = JSON.stringify(layerDefs);
    return params;
  };
}
        
patchMapImageLayer(layer);‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Here's a small sample app using your layer, which shows it working as expected: JS Bin - Collaborative JavaScript Debugging

Be sure to remove this code once you upgrade to 4.3 since this will break the app. Hopefully that helps!

Re: DefinitionExpression with MapImageLayer subLayer

RandyBonds_Jr_ — Tue, 10 Jan 2017 22:54:22 GMT

Awesome! Thank a ton!