topic Re: Is it possible to extract field Type information in onEachFeature? in Open Source Mapping Libraries Ques.

Is it possible to extract field Type information in onEachFeature?

GreigMcArthur — Mon, 28 Aug 2023 13:50:37 GMT

I'm currently using an older (6months+) version of esri-leaflet and previous I modified the onEachFeature function to be able to find the related L.esri.featureLayer for the layer.

With this I could then access the field metadata through featureLayer.fields

The reason was for simple type detection and formatting for display in popup - i.e. detect the esriFieldTypeOID field and ignore it, or detect a date field and format the output accordingly etc.

I don't see an equivalent of the 'fields' array in the current FeatureLayer class - is there somewhere else I can get this metadata for a layer?

Re: Is it possible to extract field Type information in onEachFeature?

PatrickArlt1 — Mon, 24 Nov 2014 17:28:38 GMT

Yes each layer has a built in layer.metadata() method to get the metadata for the layer. It accepts a callback function which will be executed with error and metadata which will contain your field information.

Getting service metadata | Esri Leaflet

In this example the metadata in the callback function should contain all your field information.

Re: Is it possible to extract field Type information in onEachFeature?

GreigMcArthur — Tue, 25 Nov 2014 18:46:56 GMT

That did it thanks- don't know how I missed that...very much appreciated!