A way to check whether JSON has successfully mapped to a data type?

Database & APIs

I'd love to try to use Data Types instead of JSON to populate various lists in a project. The latter works great, but I've now spent days of yak-shaving trying to get the same data into Data Types and from there into my lists. I've started having dreams of that red error screen.

I've been through https://docs.flutterflow.io/resources/data-representation/custom-data-types/ β€” and specifically the section on mapping JSON responses from API calls … over and over. I pretty much have that memorized, yet the data is apparently NOT mapping into the Data Type I've created.

Not sure what I'm missing, and the documentation still seems to be pretty sparse on this. But I'd love to figure out if the data is mapping successfully, at least, before setting all the variables in the app.

Is that possible?

What have you tried so far?
Did you check FlutterFlow's Documentation for this topic?
Yes
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