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DSN or django-signal-notifier is a Django package to send message or notification based on the Django's signals triggering

Project description

DSN or django-signal-notifier is a Django package to send message or notification based on the Django’s signals triggering. You can assign some backends to each signal(e.g., An In-Site notification app).

The major difference between django-signal-notifier and other Django’s notification packages is that DSN isn’t just a simple message delivering system. It can act as a middleware between Django and every messenger client (Various clients like email, telegram, SMS and twitter).

It’s working with event methodology, and it’s based on Django signal. If a signal triggers, A messenger is called to send a message for specified users. To understand how it works, We explain some main concepts at first.

Concepts (Summary version)

DSN’s architecture :

DSN Architecture

In a nutshell, we can say DSN is developed to send message :

  • When and Where ? : When a Trigger Triggered (The associated signal’s send function is called, and the trigger’s specs match).
  • What to send?: The message that is created to the message_template and other parameters like signal_kwargs.
  • Whom to send? : Send the message to the registered receivers in the subscription or the dynamic user that can be specified in the messenger.

Note

You should pay attention to these 3 questions when you want to assign a new trigger to a signal.

Setup

Requirements

  • Python 2.7, 3.4, 3.5, 3.6, 3.7
  • Django 1.7, 1.8, 1.9, 1.10, 1.11, 2.0, 2.1, 2.2, 3.0

Installation

1. Install django-signal-notifier by pip:

$ pip install django-signal-notifier

or use the source

$ git clone https://gitlab.com/hadiazaddel/django-signal-notifier
$ cd django-signal-notifier
$ python setup.py sdist
$ pip install dist/django-signal-notifier*
  1. Add “django_signal_notifier” at the end of INSTALLED_APPS setting like this
INSTALLED_APPS = [
    'django.contrib.auth',
    'django.contrib.contenttypes',
    ...
    'django_signal_notifier',
]
  1. django-signal-notifier configure by admin panel by default(Can be configured by code, tough)
  2. Use python manage.py migrate for schema migration.

Usage

  1. Run the development server and visit http://127.0.0.1:8000/admin/ To create a trigger(signal), backends(messenger and message_template), and subscription (you’ll need the Admin app enabled).

  2. You can test it like this:

    5.1. Create a trigger (verb=pre_save and action_object=TestModel1)

    5.2. Create a backend (messenger=SimplePrintMessengerTemplateBased and message_template=SimplePrintMessageTemplate)

    5.3. Create a subscription that connects the trigger and the backend. Add admin to the receiver(user) list.

    5.4. Run this command in manage.py shell:

    from django_signal_notifier.models import *
    TestModel1_another_instance = TestModel1.objects.create(name="new_test_model2", extra_field="extra")
    

    Now you should see a message when you create TestModel1. By Creating new TestModel1, Django calls the pre_save signal’s send method. Then this signal call associated trigger handler. In the Trigger handler, the associated backend is called. The message_template with some details are sent to the backend. In our case, a simple message is printed. You can provide your messengers and message_templates.

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