topic Re: How to update / add feature attributes? in ArcGIS JavaScript Maps SDK Questions

How to update / add feature attributes?

AndrewMurdoch1 — Wed, 16 Nov 2022 22:00:37 GMT

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

Re: How to update / add feature attributes?

UndralBatsukh — Thu, 17 Nov 2022 17:00:49 GMT

Hi there,

It is hard to suggest anything without a repro case. Are you working with a FeatureLayer that references a feature service or is this a client-side FeatureLayer? You should see the updated values for feature services without having to do anything as long as applyEdits resolves successfully. For client-side featureLayer, you have to query the updated features once applyEdits resolves successfully.

It is explained in this document: https://next.sites.afd.arcgis.com/javascript/latest/api-reference/esri-layers-FeatureLayer.html#applyEdits

This very simple sample shows and explains this workflow: https://developers.arcgis.com/javascript/latest/sample-code/layers-featurelayer-collection-edits/

Re: How to update / add feature attributes?

AndrewMurdoch1 — Thu, 17 Nov 2022 17:57:19 GMT

Good Day

Thanks for the reply, I'm using a Hosted Feature Layer, please see this more complete example:

addGISFeatureAttributes(layer: FeatureLayer) { return new Promise((r) => { console.time('correlationLook10k'); this.queryAllFeatures(layer).then((features: Graphic[]) => { this.grabData().then(() => { features.forEach((feature, idx) => { const matchedFeature = this.data.find(d => d.x === feature.attributes.x) if (matchedFeature) { const value1 = matchedFeature?.find(m => m.type === 'v1').value ?? 0; const value2 = matchedFeature?.find(m => m.type === 'v1').value ?? 0; const value3 = matchedFeature?.find(m => m.type === 'v1').value ?? 0; feature.setAttribute('v1', Number(value1)); feature.setAttribute('v2', Number(value2)); feature.setAttribute('v3', Number(value3)); feature.attributes.v4 = Number(value3); } }) layer.applyEdits({updateFeatures: features}).then((updateResults) => { console.log('Update Results'); console.log(updateResults); const query = { where: '1=1', outFields:['*'], returnGeometry: true, maxRecordCountFactor: 5 } const objectIds = []; updateResults.updateFeatureResults.forEach((item) => { objectIds.push(item.objectId); }); console.log('Object Ids'); console.log(objectIds); layer.queryFeatures(query).then((results) => { console.log(results.features.length, "features have been added."); console.timeEnd('correlationLook10k'); r(results); }).catch((error) => { console.log('Query Feature Error'); console.log(error); }) }).catch((error) => { console.log('Upload Error'); console.log(error); }) }); }); }); } showPortalFeatureLayerByYear(year: number = new Date().getFullYear()) { let layerId = "SOME PORTAL ID" this._layers = []; new FeatureLayer({ portalItem: { id: layerId, }, outFields: ['*'] }).load().then((layer) => { this.addGISFeatureAttributes(layer).then((features: FeatureSet) => { console.log('Features'); console.log(_.cloneDeep(features)); return new FeatureLayer({ source: features.features, fields: features.fields, renderer: null, spatialReference: { wkid: 102100 }, outFields: ["*"] }).load().then((layer) => { this._layers.push(layer); this.renderHostedFeatureLayer(); }) }) }) }

Should I have my new layer with v1 -> v4? This does the applyEdits, and this does the query stage. One thing I've noticed, this is slow, ~60 seconds for 10k assets, so this generally not recommended?

Thanks

Re: How to update / add feature attributes?

ReneRubalcava — Thu, 17 Nov 2022 20:42:10 GMT

Can you verify that the fields you are trying to update are in the the layers fields array?

Re: How to update / add feature attributes?

AndrewMurdoch1 — Thu, 17 Nov 2022 20:53:53 GMT

Yes, they exist, the features all contain v1 -> v4, v1 is always a number from 0 - 100 in string form, and I'm doing feature.setAttribute('v1', "SUPERRANDOMSET"). After that logic runs v1 is still "0" - "100", when I expect it to be "SUPERRANDOMSET".

Could there be a problem running the update on a layer that was created from ArcGIS Online? I've been able to do this with client side graphics when I build them manually.

Re: How to update / add feature attributes?

AndrewMurdoch1 — Thu, 17 Nov 2022 22:26:39 GMT

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?