topic Re: Getting $feature attribute using brackets and variable not working. in Attribute Rules Questions

Getting $feature attribute using brackets and variable not working.

omar-marji — Wed, 02 Mar 2022 09:02:33 GMT

Trying to access a feature's attribute using the bracket notation does not work when using a variable (unless it is accessed at least once using a string.

If you take a look at the snippet below. This gives an error

var fldName = "ASSETTYPE"; Console($feature[fldName]);

The error message is :

Invalid expression.
Error on line 2.
Field not found ASSETTYPE

While If I try to use the snippet below. It works without an error

var ftrValue = $feature["ASSETTYPE"]; Console(ftrValue); var fldName = "ASSETTYPE"; Console($feature[fldName]);

Any ideas how I can work around this restriction? I have a dynamic list of fields that I am trying to use to get values from the feature.

One thing to note is that if I use OBJECTID for the first snippet, it does not give any errors and works without having to access the field first using an inline string!

Re: Getting $feature attribute using brackets and variable not working.

JohannesLindner — Wed, 02 Mar 2022 10:33:05 GMT

I'm sure there are more elegant solutions...

var attributes = Dictionary(Text($feature))["attributes"] var field_names = ["ASSETTYPE", "OBJECTID"] for(var i in field_names) { Console(attributes[field_names[i]]) }

Re: Getting $feature attribute using brackets and variable not working.

omar-marji — Wed, 02 Mar 2022 12:25:23 GMT

Thanks for your help.

Unfortunately, this still has the same issue and I am starting to think it is in the way the "verify" function works when creating the attribute rules.

Check the below scenario:

Console(Text($feature));

This results in the following object

{ "geometry":{ "x":####, "y":####, "z":0, "m":null, "spatialReference":{"wkid":####} }, "attributes":{ "GLOBALID":"{443094DA-F564-47D2-A07E-F47EA9B1C03A}", "OBJECTID":5 } }

While this scenario (although the attributes was accessed after the console call)

Console(Text($feature)); var assetType = $feature["ASSETTYPE"];

Results in the following

{ "geometry":{ "x":####, "y":####, "z":0, "m":null, "spatialReference":{"wkid":####} }, "attributes":{ "ASSETTYPE":101, "GLOBALID":"{443094DA-F564-47D2-A07E-F47EA9B1C03A}", "OBJECTID":5 } }