This is the example code featured in my webcast on Circular Dependencies in Python and Flask, available at https://www.youtube.com/watch?v=NH-8oLHUyDc. The application is based on the code from my blog article on SQLAlchemy soft deletes: http://blog.miguelgrinberg.com/post/implementing-the-soft-delete-pattern-with-flask-and-sqlalchemy.
- Create a virtual environment and activate it (Python 2.7 and Python 3.4+ are both okay)
- Install the requirements:
pip install -r requirements.txt - Create the database:
flask db upgrade - Run the service:
flask run
This example implements a small API that can be accessed from the command line. The httpie client is installed and you can use it to send requests. Below are some example commands:
To create a new user with name "john":
http POST http://localhost:5000/users name=john
To get the list of users:
http GET http://localhost:5000/users
To get the user with id 1:
http GET http://localhost:5000/users/1
To add a message from the user with id 2:
http POST http://localhost:5000/users/2/messages message=hello
To get the list of messages:
http GET http://localhost:5000/messages
To delete the user with id 3:
http DELETE http://localhost:5000/users/3