Modifying Pydantic models

This is some WIP/thoughts on how I can modify a Pydantic Model to return only a specified (dynamic) subset of fields.

Currently, model_test4.py is the closest to what I want to achieve.

This is work to improve my sqliter project, specifically the case where the user wants to return only a subset of fields from a table, and will eventually replace the code in the model_validate_partial class method in model.py.

Putting it out here in the hope that someone else can benefit from it. There is not a lot of info on how to do this, so I had to figure it out myself.

Usage

You need to have uv installed to run the code, then you can set up the virtual environment and install the dependencies:

uv sync

Then activate the virtual environment:

source .venv/bin/activate

Note

The only dependency is pydantic, so you can install it with pip if you don't want to use uv, or add this to your own project.

Then you can run the individual example files:

python model_test4.py