Using a field to filter another field in Field Maps; no work around?

[LeanneTough]

Ideally, I want a drop down box in Field Maps to filter another drop down box. I have a field called 'Codes', and each code has several 'Options' which are in another field. If a worker chose the Code 'Roofing', the very long Options list would be filtered to just show the Roofing Options.

I've spent a couple of days trying to see if there is a work around, and everywhere keeps saying that Filter in Arcade isn't possible yet. @Anonymous User, I saw you've talked about sub-types (https://community.esri.com/t5/arcgis-field-maps-questions/can-you-limit-the-drop-down-list-of-domain-values/m-p/1019329#M272) but I can't find any documentation about how to code this in Field Maps. 

Is there really no work around? Do I just need to be patient? Does anyone know for how long?

[Anonymous User · Accepted solution]

Another solution that would function similar to a filter would be to create unique fields for each of the 'Codes' corresponding options. Then create a domain for each of those fields (containing the options), creating drop-down boxes for each of those fields, and then using Arcade's hide-show logic to only show the drop-down box for the selected Code. So if code 'Roofing' is chosen, a drop down for Roofing Options is shown. All of the options could then be brought into one field using Python, Field Calculator, or having Arcade doing it dynamically. 

[LeanneTough]

Thank you William, this a great idea. I'm going to leave this open for a few more days to see if anyone gets back with any other solutions.