Local db

Do you mean for a sql index? Or something else?

I just mean some kind of Pydantic class.

So I just save it as json, and read that json file

So what's the full use case then? You want to index some json files?

No my full use case was

I want to use as pre-built db(local db, just a simple PyDantic class), with a composite indices.

For example, I want to use Doc1, Doc2, DB as a {context_str} when querying.

So I construct an index for Doc1, Doc2 and made DB as a json, and then construct is as an index

Yea that's definitely possible by the sound of it! 👌