topic Re: on.once(featureLayer, "before-apply-edits", lang.hitch(this, function (evt) { in ArcGIS Online Developers Questions

on.once(featureLayer, "before-apply-edits", lang.hitch(this, function (evt) {

JoseSanchez — Tue, 18 Apr 2017 13:10:40 GMT

Hello everyone,

On the Edit Widget, I am looking for a description of the "on.once" function?

this.editor.templatePicker.on("selection-change", lang.hitch(this, function () {
   var selected = this.editor.templatePicker.getSelected();
   if (selected) {
      var featureLayer = selected.featureLayer;
      on.once(featureLayer, "before-apply-edits", lang.hitch(this, function (evt) {
         if (evt.adds && evt.adds.length > 0) {

Is is part of the FCalss FeatureLayer

FeatureLayer (legacy) | API Reference | ArcGIS API for JavaScript 3.20

Thanks

Re: on.once(featureLayer, "before-apply-edits", lang.hitch(this, function (evt) {

RobertScheitlin__GISP — Tue, 18 Apr 2017 13:17:35 GMT

Jose,

You need to refer to the dojo doc on that:

dojo/on — The Dojo Toolkit - Reference Guide

Re: on.once(featureLayer, "before-apply-edits", lang.hitch(this, function (evt) {

JoseSanchez — Tue, 18 Apr 2017 14:44:57 GMT

Thanks Robert I took a look to the dojo function.

Concerning the event "before-apply-edits" it gets "Fired before edits are applied to the feature layer."

What I don't understand is where in the source code can I check this event BEFORE and AFTER attributes get populated by the editor on the

this.editor.attributeInspector popup window.

In this sample, the code runs BEFORE it gets modified in the attributeInspector, this is why fields are auto-populated.

I am looking for a way to get the values of the feature AFTER they get entered in the attributeInspector . For example how can I check that the ProjectID field has its first 4 digits equal to the current year, 2017.

  var featureLayer = selected.featureLayer;
      on.once(featureLayer, "before-apply-edits", lang.hitch(this, function (evt) {
         if (evt.adds && evt.adds.length > 0) {

// Populate field ProjectID: How to check that the 4 first 4 digits are the Current Year 2017

if (evt.adds[0].attributes.hasOwnProperty('ProjectID')) {

Re: on.once(featureLayer, "before-apply-edits", lang.hitch(this, function (evt) {

RobertScheitlin__GISP — Tue, 18 Apr 2017 15:18:16 GMT

I don't have the answer to that.

Re: on.once(featureLayer, "before-apply-edits", lang.hitch(this, function (evt) {

JoseSanchez — Tue, 18 Apr 2017 19:45:50 GMT

May be I need to use the event "applyEdits"

//add a save button next to the delete button
var saveButton = new Button({ label: "Save", "class": "saveButton"},domConstruct.create("div"));
domConstruct.place(saveButton.domNode, attInspector.deleteBtn.domNode, "after");

saveButton.on("click", function() {
updateFeature.getLayer().applyEdits(null, [updateFeature], null);
});

attInspector.on("attribute-change", function(evt) {
//store the updates to apply when the save button is clicked
updateFeature.attributes[evt.fieldName] = evt.fieldValue;
});

https://developers.arcgis.com/javascript/3/jssamples/ed_attribute_inspector.html