Is it possible to assign a different tag to things saved to a TinyDB?

In my workout app, I’d like to save exercises to a list view, then the date to a separate list view, and when the Date List view is selected, it should show the exercises for that date, however it shows the entire DB, so all exercises ever entered.

Basically, when I press enter on Date, it saves it to an invisible list, and when press enter on exercises it saves it to the list below on a local variable, and to a DB which is called on when I press the date list view. This is all done on the same screen too.

If you are looking up things by date, this is a good place to use TinyDB with the yyyyMMdd date as the tags and the exercises as values.
See this sample …