bmwasaru / bank

event sourcing illustration

Illustrating Event Sourcing in Django

Requirements

Requires Python 3.6 and PostgreSQL

Installation

Create, activate virtualenv venv and install requirements

virtualenv -p python3 venv
. venv/bin/activate
pip install - requirements.txt

Change the database settings in the bank/settings.py`` file accordingly and create a superuser python manage.py createsuperuser`

Run the django shell

python manage.py shell

Testing it out

from bank.models import Account
from django.contrib.auth.models import User
from django.contrib.contenttypes.models import ContentType
from bank.models import Event
account = 
account.make_deposit(50.0)
account.make_deposit(12220.0)
account.make_withdrawal(20.0)
events = Event.objects.filter(
         content_type=ContentType.objects.get_for_model(account), 
         object_id=account.id
        )
for event in events:
    print(event.body)

{"owner_id": 1, "id": 6, "type": "created_account"}
{"amount": 50.0, "type": "make_deposit"}
{"amount": 12220.0, "type": "make_deposit"}
{"amount": 20.0, "type": "made_withdrawal"}