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Variable string query outFields vs hard-coding

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04-20-2022 02:21 PM
GregoryBologna
Frequent Contributor

Why does variable string query outFields fail for FeatureLayer?

Example:

var queryFields = "FIELD1,FIELD2";

const query = mapLayerView.createQuery();
query.outFields = [queryFields]; This works!

const queryFeatureLayer = new FeatureLayer({
   url: url,
   outFields: ["FIELD1", "FIELD2"]
   // outFields: [queryFields] This will return error below
});

Error
esri.layers.support.fieldProperties] field-attributes-layer:invalid-field Invalid field FIELD1,FIELD2 found in outFields {layer: v, outFields: Array(1)}

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Accepted Solutions
UndralBatsukh
Esri Regular Contributor

Hi there, 

Both FeatureLayer.outFields and Query.outFields expect string of arrays. Query.outFields accepting string of field names is not supported in the JS API and is working accidentally. 🙂

 

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UndralBatsukh
Esri Regular Contributor

Hi there, 

Both FeatureLayer.outFields and Query.outFields expect string of arrays. Query.outFields accepting string of field names is not supported in the JS API and is working accidentally. 🙂

 

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