Django

Quickstart

Quick Development Start

/opt/Repo$ git clone <project-name>.git
/opt/Repo$ python -m venv ../Venvs/<project-name>

In VSCODE:

F1 -> "Python: Select Interpreter"

Ctrl + J, to enter terminal.

Install Django and Django REST framework into the virtual environment

pip install django djangorestframework

Create project and app:

django-admin startproject <project-name> .
django-admin startapp <app-name>

Makemigrations and migrate:

python manage.py makemigrations
python manage.py migrate

Create superuser:

python manage.py createsuperuser --email <email> --username <username>

Edit <app-name>/settings.py:

ALLOWED_HOSTS = ['*']

Run development web server:

python manage.py runserver 0:8000

Celery

Ensure broker/plugin installation:

sudo apt-get install rabbitmq-server
rabbitmq-plugins enable rabbitmq_management

In project virtual environment:

pip install celery django_celery_beat django-celery-results

  1. Add ‘django_celery_results’ and ‘django_celery_beat’ to your INSTALLED_APPS setting in settings.py.

  2. Define a Celery instance in your project’s __init__.py file:

 1from celery import Celery
 2from django.conf import settings
 3
 4app = Celery('my_project')
 5
 6# Load task modules from all registered Django app configs.
 7app.autodiscover_tasks()
 8
 9# Configure the default settings for Celery
10app.conf.update(
11    broker_url=settings.CELERY_BROKER_URL,
12    result_backend=settings.CELERY_RESULT_BACKEND,
13    timezone=settings.TIME_ZONE,
14    task_track_started=True,
15)

  1. In project settings.py:

CELERY_BROKER_URL = 'amqp://localhost'
CELERY_BROKER_URL="amqp://<user>:<password>@localhost:5672/<vhost>"
CELERY_RESULT_BACKEND = 'django-db'

Commands

Run celery worker:

celery --app=<app-name> worker -l info --task-events --concurrency=1

Run celery beat:

celery -A <app-name> beat -l info

Check registered celery tasks:

celery -A <app-name> inspect registered

Purge tasks:

celery --app=<app-name> call django_celery_beat.schedulers.DatabaseScheduler.purge

Call tasks from django commands:

python manage.py call_celery_task celery_tasks.tasks.fetch_instagram_data
python manage.py call_celery_task celery_tasks.tasks.fetch_instagram_posts
python manage.py call_celery_task celery_tasks.tasks.fetch_instagram_post_metrics

Flower (http://localhost:5555)

celery -A metrics --broker=amqp://localhost:5672// flower --broker_api=http://localhost:15672/api/
celery -A metrics flower --broker=amqp://<user>:<password>@localhost:5672/ --broker_api=http://<user>:<password>@localhost:15672/api/
celery -A vsports flower --logging=debug