i need do query by more than one layer the same time

EduardoMazzucchelli

is it posible ?

I use javascript 4.11

'https://js.arcgis.com/4.11/esri/themes/light/main.css',
'https://js.arcgis.com/4.11/',
"https://unpkg.com/angular-esri-map@2.0.5/dist/angular-esri-map.js"

const view = new MapView({
container: "viewDiv",
map: new WebMap({
basemap: "satellite",
layers: [
new FeatureLayer({
url: https://portalgis.sinopecarg.com.ar/arcgis/rest/services/SERVICIOS_GIS/InstalacionesPozos_GSJ/MapServer/1,
new FeatureLayer({
url: https://portalgis.sinopecarg.com.ar/arcgis/rest/services/SERVICIOS_GIS/InstalacionesPozos_GSJ/MapServer/2
]
}),

I need do a query by: 

const pozosA = view.map.layers.getItemAt(1);
const pozosI = view.map.layers.getItemAt(2);

How have I to do ???

Regards

Eduardo

RRubalcava

You can wrap multiple requests in a Promise.all

Promise<SPAN class="punctuation token">.</SPAN><SPAN class="token function">all</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">[</SPAN>
  layer1<SPAN class="punctuation token">.</SPAN><SPAN class="token function">queryFeatures</SPAN><SPAN class="punctuation token">(</SPAN>query1<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN>
  layer2<SPAN class="punctuation token">.</SPAN><SPAN class="token function">queryFeatures</SPAN><SPAN class="punctuation token">(</SPAN>query2<SPAN class="punctuation token">)</SPAN>
<SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="token function">then</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">[</SPAN>result1<SPAN class="punctuation token">,</SPAN> result2<SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">=</SPAN><SPAN class="operator token">></SPAN> <SPAN class="punctuation token">{</SPAN>
  <SPAN class="comment token">// use your results</SPAN>
<SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

Only issue in this case, is if one request errors, they are both rejected. We have a utility in the API to handle this called esri/core/promiseUtils#eachAlways

There is a native Promise.allSettled that has the same behavior and will resolve when all promises are fulfilled, or rejected.