topic Re: FeatureLayer Promise Doesn't Resolve in ArcGIS JavaScript Maps SDK Questions

FeatureLayer Promise Doesn't Resolve

JaredGasco — Tue, 12 Dec 2017 17:56:19 GMT

Hello All,

I'm creating FeatureLayer objects from SubLayer objects in order to use them as sources in a Search widget. One of the FeatureLayer objects seems to work properly as a source while the other two don't. I originally added them as sources without using the then method callback on the FeatureLayer objects. I then tried adding them within the then method callback and none of them got added because the Promises never resolved. I then wrote some test code with a completely different MapServer and the same thing happens.

Does anyone know why the FeatureLayer Promise isn't resolving?

Re: FeatureLayer Promise Doesn't Resolve

UndralBatsukh — Tue, 12 Dec 2017 18:44:04 GMT

Hi Jared,

Looking at your code, you are not adding the featureLayer to the view so it is the developer's responsibility to load the layer. Please take a look at the doc for the FeatureLayer.load():

https://jscore.esri.com/javascript/latest/api-reference/esri-layers-FeatureLayer.html#load

fl.load().then(function(){
console.log("layer loaded");
});

Hope this helps,

-Undral

Re: FeatureLayer Promise Doesn't Resolve

ThomasSolow — Tue, 12 Dec 2017 18:58:05 GMT

The Feature Layer won't attempt to load unless you add it to the map or manually load it.

So try returning new FeatureLayer({ ... }).load(), or add the Feature Layer to your map before returning it.

I should note, I'm not sure if a sublayer in a MapImageLayer can be a FeatureLayer.

Re: FeatureLayer Promise Doesn't Resolve

KristianEkenes — Tue, 12 Dec 2017 19:36:36 GMT

> I should note, I'm not sure if a sublayer in a MapImageLayer can be a FeatureLayer.

You can use any feature service or map service endpoint as a data source for feature layer.

Re: FeatureLayer Promise Doesn't Resolve

JaredGasco — Tue, 12 Dec 2017 20:09:40 GMT

Thanks everyone. Invoking the load method before the then method solved my issues.