topic Re: Arcade expression not working automatically on web app / field app in ArcGIS Web AppBuilder Questions

Arcade expression not working automatically on web app / field app

yockee — Tue, 05 Nov 2024 08:03:56 GMT

I want to populate an attribute based on another attribute value using arcgis arcade on a web map / field map.

Suppose I have 2 attributes: attribute1 and attribute2. Attribute1 will be updated if Attribute2 has certain value. Here is the code on attribute1:

if ($feature.attribute2 != "b")
{
return "yy";
}
else
{
return "xy";

The formula is correct. But why attribute1 is not updated automatically when attribute2 is updated / inserted (I update the atribute by changing the column value of atribute2) ?

Here is the screenshot:

Re: Arcade expression not working automatically on web app / field app

ChristopherCounsell — Tue, 05 Nov 2024 09:06:43 GMT

Are you editing via the attribute table or via the form with the arcade calculation?

Updating the table directly typically doesn't invoke the form based calculation.

You need to edit the feature via the form in the web map, field map, or using a widget in an app.

Re: Arcade expression not working automatically on web app / field app

yockee — Tue, 05 Nov 2024 09:17:11 GMT

I update the table on the web map app. I do not edit the spatial, only edit
attribute.
Even using Field Map, the arcade function is not invoked.

Re: Arcade expression not working automatically on web app / field app

yockee — Wed, 06 Nov 2024 07:19:26 GMT

I wonder if this " return "xy"; " actually modifies the content (attribute) of the feature. Because no errors are reported and the apps working fine but the field is still not changing.

Perhaps the correct thing is this:

    return {
        'edit': [{
            'classname' : 'WAT_Hydrant',
            'updates' : [{
                'objectID': hydrant.ObjectID,
                'attributes' : {'INSP_STATUS' : 'OOS'}
            }]
        }]
    }

from: https://community.esri.com/t5/arcgis-pro-questions/using-arcade-to-edit-an-attribute-in-another/m-p/1271016#M67084

Re: Arcade expression not working automatically on web app / field app

ChristopherCounsell — Wed, 06 Nov 2024 07:18:36 GMT

Do you have both editing and calculation enabled on the feature in the form? If so, the expression won't run:

https://doc.arcgis.com/en/field-maps/latest/prepare-maps/configure-the-form.htm#ESRI_SECTION2_5F65DF4B642C4A4D9CAFE6A4BF6BB676

Re: Arcade expression not working automatically on web app / field app

yockee — Wed, 06 Nov 2024 09:40:11 GMT

How to check if editing and calculation are enabled ?
My service is a feature service with update geometry and attribute
enabled...

Re: Arcade expression not working automatically on web app / field app

ChristopherCounsell — Wed, 06 Nov 2024 09:49:20 GMT

In the form. Where you have configured the arcade expression to calculate it.

Can you show your form in map viewer and were you are applying the edits?