how to tinker with app when developping

[robido]

First check

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Description

I have a few SQLAlchemy models in my fastAPI app, and let's say I want to experiment, for instance, I want to develop a filter, and I need to tinker with the code to try a few things. How can I do that without having to create Schemas and endpoints for a model I just want to play with?

Additional context

The FastAPI docs give a method for debugging, would it be one way to handle it? Pause the program then write custom commands. Essentially, I am asking if there is the equivalent of an interactive shell, similar to what Django, Flask, or Laravel (tinker) offer. If not, what is the recommended workflow to tinker with models?

[Kilo59]

You can run uvicorn with --reload and it will redeploy a local development server everytime it detects a source file has changed.

uvicorn your_package.main:app --reload

https://www.uvicorn.org/deployment/

[robido]

Thanks @Kilo59 I tried that, but I get this error:
sqlalchemy.exc.UnboundExecutionError: Could not locate a bind configured on mapper mapped class User->user, SQL expression or this Session

I am using this repo: https://github.com/tiangolo/full-stack-fastapi-postgresql. The code works fine in Docker, so if I go to http://localhost/api/v1/users I get the expected results, but http://localhost:8000/api/v1/users shows the above error.

I'll try this now see if that helps:
fastapi/full-stack-fastapi-template#7

[tiangolo]

What I would do is using VS Code, start an "Interactive Session", that's actually Jupyter underneath, that I think is more powerful than any other Python interactive shell, and then I would run commands there interactively, or actually, select sections of code in the editor and execute them in the interactive session (with Shift+Enter).

Check more info here: https://code.visualstudio.com/docs/python/jupyter-support

[github-actions]

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