Suggestions on formatting JSON serialization?

Hello! Experimenting with the gem with a basic rails api - any suggestions on a good entry point/mechanism for customizing the JSON output of a ActiveRecord attribute storing a Tod::TimeOfDay? I'd like to show the outpost as a '11:00:00' for example rather than the components.

I'm just using a simple `as_json` for my models. There's lots of ways of doing this of course, adding a method that does the string formatting, using ActiveModelSerializers and overriding the attribute getter, but I'd like to find a higher-level way of customizing the output, if possible. Thank you!

Start with the Rails API's model as_json path and the Tod::TimeOfDay attribute mentioned in the issue. Compare the possible entry points—custom string formatting, ActiveModelSerializers, and overriding the attribute getter—and clarify which supported mechanism should produce "11:00:00" rather than component fields. Done means a documented, tested way to obtain that JSON output.

Written by the indexing model from the issue text.