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Playlist Manager - Backend

System Requirements

The project uses poetry for Python to create an isolated environment and manage package dependencies. To prepare your system, ensure you have an official distribution of Python version 3.10+ and install Poetry using one of the following commands (as instructed by the poetry documentation):

Poetry installation (Bash)

curl -sSL https://install.python-poetry.org | python3 -

Poetry installation (PowerShell)

(Invoke-WebRequest -Uri https://install.python-poetry.org -UseBasicParsing).Content | py -

You can check poetry is installed by running poetry --version from a terminal.

Please note that after installing poetry you may need to restart VSCode and any terminals you are running before poetry will be recognised.

Dependencies

The project uses a virtual environment to isolate package dependencies. To create the virtual environment and install required packages, run the following from your preferred shell:

$ poetry install

You'll also need to clone a new .env file from the .env.template to store local configuration options. This is a one-time operation on first setup:

$ cp .env.template .env  # (first time only - or when environment variables have been updated)

The .env file is used by flask to set environment variables when running flask run. This enables things like development mode (which also enables features like hot reloading when you make a file change). There's also a SECRET_KEY variable which is used to encrypt the flask session cookie.

Running the App

Once the all dependencies have been installed, start the Flask app in development mode within the Poetry environment by running:

$ poetry run flask run

You should see output similar to the following:

 * Serving Flask app 'todo_app/app'
 * Debug mode: on
WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
 * Running on http://127.0.0.1:5000
Press CTRL+C to quit
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 140-316-129

If you now run the frontend you should be able to communicate with the backend

Running Tests

Tests can be run with poetry run pytest

Running DB Migrations

Load env variables with source .env Run Python locally python3 Import migration file >>>: from src.database.migrations.(migration_file_name) import up, down Run migration >>>: up() / down()