How to update / add feature attributes?

AndrewMurdoch1

Good Day

I already know about setAttribute, my question is how save the update so my attribute become available?

 

this.grabData().then(() => {
	this.queryAllFeatures(this._layers[0]).then((features: Graphic[]) => {
  		features.forEach((feature, idx) => {
    			const matchedFeature = this.data.find(d => d.x === feature.attributes.x)
	
    			if (matchedFeature) {
			      const value1 =
				matchedFeature?.box?.find(i => i.type === 'a').value ?? 0;

				feature.setAttribute('someValue', Number(value1));
				// Repeated X times
    			}
  		})
  	})
})

 

If I do this, and try to reference "someValue" I get an error that it doesn't exist, so I tried to use "applyEdits" to update the value:

 

this._layers[0].applyEdits({ updateFeatures: features })
    .then((editsResult) => {
        console.log('Edit Results');
        console.log(editsResult);
    })
    .catch((error) => {
        console.log("error = ", error);
});

 

Which works, but I still don't see my new attributes.  Previous I was getting an error from applyEdits, but I resolved that problem! 

Can anyone see what I'm doing wrong? 

Thanks

AndrewMurdoch1

The other question I should ask, is this even recommended or practical to do?  We could have layers with 100k+ features in them, and we'd want to perform the same kind of step, is there anyway to do this at scale and with minimal latency?