flask-babylonjs

Flask BabylonJS

A Python Flask application with Babylon.js 3D scenes

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Executive Summary

Run this application as follows:

1. Enter flask_app directory: $ cd flask_app
2. If non-existent, create a virtual environment inside the flask_app directory: $ python3 -m venv .venv (macOS: $ virtualenv .venv)

In case of the following, follow its advice:

The virtual environment was not created successfully because ensurepip is not available.

On Debian/Ubuntu systems, you need to install the python3-venv package using the following command.

sudo apt-get update
sudo apt install python3.10-venv

You may need to use sudo with that command. After installing the python3-venv package, recreate your virtual environment.

On macOS see https://sourabhbajaj.com/mac-setup/Python/virtualenv.html

3. Start the virtual environment and enter: . .venv/bin/activate (macOS: source .venv/bin/activate)
4. Run $ pip install -r requirements.txt
5. Run: $ cd app then $ npm install finally $ cd ..
6. Set the Flask App to app directory: (.venv) $ export FLASK_APP=app
7. Set the Flask Environment to True for development: (.venv) $ export FLASK_DEBUG=True
8. Set the SQLAlchemy Database URI: (.venv) $ export SQLALCHEMY_DATABASE_URI=..., default is sqlite:///app.db
9. Set SQLAlchemy Track Modifications: (.venv) $ export SQLALCHEMY_TRACK_MODIFICATIONS=True
10. Set Secret Key: (.venv) $ export SECRET_KEY=********
11. Run the flask app: (.venv) $ flask run (.venv) $ python3 run.py
12. Open the web interface as prompted
13. Use CTRL+c to exit the web server.
14. Alternatively run the flask command line interface: (.venv) $ flask shell
15. Execute any flask commands: >>>
16. Use exit() to exit from the command line interface.

In general, you can take the following steps to manage your database migrations as you develop your Flask applications:

1. Modify the database models.

2. If no migrations directory yet exists in the flask_app directory, run (.venv) flask_app $ flask db init.

3. Generate a migration script with the flask db migrate -m "some comment" command. If there have been no changes since last migration, you will be prompted with No changes in schema detected.. Hence, you can repeat this command without fear.

4. Review the generated migration script and correct it if necessary.

5. Apply the changes to the database with the flask db upgrade command.

6. To restore a previous database version, use the flask db downgrade command.

100 - Introduction

See README.md

200 - Requirements

See README.md

300 - Building Our Application

See README.md

400 - Conclusion

See README.md