Flask Api

An API Built in Flask.

Docker Quickstart

This app can be run completely using Docker and docker-compose. Using Docker is recommended, as it guarantees the application is run using compatible versions of Python.

There are three main services:

To run the development version of the app

docker-compose up flask-dev

To run the production version of the app

docker-compose up flask-prod

The list of environment: variables in the docker-compose.yml file takes precedence over any variables specified in .env.

To run any commands using the Flask CLI

docker-compose run --rm manage <<COMMAND>>

Therefore, to initialize a database you would run

docker-compose run --rm manage db init
docker-compose run --rm manage db migrate
docker-compose run --rm manage db upgrade

Running locally

Run the following commands to bootstrap your environment if you are unable to run the application using Docker

cd FlaskAPi
pip install poetry
poetry install
export FLASK_APP=autoapp
flask run

The flask API will start on http://localhost:5000.

Database Initialization (locally)

Once you have installed your DBMS, run the following to create your app's database tables and perform the initial migration

flask db init
flask db migrate
flask db upgrade

Deployment

When using Docker, reasonable production defaults are set in docker-compose.yml

FLASK_ENV=production
FLASK_DEBUG=0

Therefore, starting the app in "production" mode is as simple as

docker-compose up flask-prod

If running without Docker

export FLASK_ENV=production
export FLASK_DEBUG=0
export DATABASE_URL="<YOUR DATABASE URL>"
npm run build   # build assets with webpack
flask run       # start the flask server

Shell

To open the interactive shell, run

docker-compose run --rm manage db shell
flask shell # If running locally without Docker

By default, you will have access to the flask app.

Running Tests/Linter

To run all tests, run

docker-compose run --rm manage test
flask test # If running locally without Docker

To run the linter, run

docker-compose run --rm manage lint
flask lint # If running locally without Docker

The lint command will attempt to fix any linting/style errors in the code. If you only want to know if the code will pass CI and do not wish for the linter to make changes, add the --check argument.

Migrations

Whenever a database migration needs to be made. Run the following commands

docker-compose run --rm manage db migrate
flask db migrate # If running locally without Docker

This will generate a new migration script. Then run

docker-compose run --rm manage db upgrade
flask db upgrade # If running locally without Docker

To apply the migration.

For a full migration command reference, run docker-compose run --rm manage db --help.

References

• Flask Cookiecutter Application