Web map Arcade expression to calculate field with sequential number

Question

Hi,

I have published a web map and app for editing a polygon. So every time when someone draws a new polygon the Serial_No field should calculate the next sequential ID.

e.g. if the last number for the polygon after sorting the field would be PDP_578 then the new polygon should calculate with PDP_579.

Is it possible? Appreciate any help about this.

Thanks,

Anu

ScottLehto4 · Answer

Thank you for this information. Has there been any improvements to this?

AnuSawant · Answer

Thanks Xander.

XanderBakker · Answer

Hi Anu Sawant ,

You would normally accomplish this using a Calculation Attribute Rule triggered by an Insert, but this functionality is not yet available in ArcGIS Online (it is in ArcGIS Enterprise and ArcGIS Pro). You can perform a calculation and when you detect a feature that has no Seriel_No, you could assign the next value to it, but you would need to schedule this as a task with a certain frequency and it will not be executed directly after a user creates a new feature.