food ordering management

A simple POC app on Django framework

What is this app ?

• This app demonstrate how to solve producer consumer problem using priority queuing in redis.
• It contains two user roles Manager and Delivery Agent
• A manager can create a task with priority as High/Medium/Low.
• A delivery agent can accept the highest priority task.
• Task can have various life cycle states viz. New->Accepted->Complted->Declined->Cancelled.
• Any event happening should be updated in realtime(websockets).

Library and Framework used

• Django as web framework
• Django.db as ORM with postgres as database.
• Channels with channel_redis to perform realtime communication by using websocket and redis as channel layer.
• Redis datastore to store task queues with above priorities.

How to Run?

• Use python3 and install all requirements : pip install -r requirements.txt
• Host/install redis server and save 'REDIS_CONNECTION' as environment variable. For example if you have hosted redis in your local system then : 'REDIS_CONNECTION' = redis://127.0.0.1:6379
• Similarly add environment variable with key 'DJANGO_SECRECT_KEY' and 'DATABASE_URL' where first one is random secret key,which second should be valid database URI for example : postgres://user:[email protected]:5432/test_database
• Run migrations python manage.py makemigrations and python manage.py migrate
• Run server python manage.py runserver
• This will run application in localhost:8000

This is a simple app to demonstate how to work in django app with realtime communication.

Any improvements/suggestions are appreciable.