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Attribute Rule to Update Feature Layer with Related Table Value

Question asked by jborgion Champion on Sep 18, 2020
Latest reply on Sep 21, 2020 by jborgion

I have created a number of attribute rules that populate a given field from underlying feature layers (thanks to Xander Bakker).  Now I would like to update a feature layer attribute from a related table.  In Frequently Asked Questions | ArcGIS for Developers  the question How do I access data from related tables sends you to the Featureset page.  But I don't see anything there regarding a related table.


In a nutshell, I have a feature layer of City polygons that I would like to relate to a table of corresponding three letter city codes.  When I add a new feature (centerline, address point etc) I can update the City name easily, but how would I update that City code from a related table?  I'd like to avoid adding yet another field to the City features.  Both the feature layer and related table will reside in the same $datastore, an enterprise geodatabase.