Django: send notifications at user based on database change-CodePudding

I have 3 database tables:

users (stores info about users e.g. email, name)
metadata (stores data)
activity (stores changes made to users/metadata tables)

I want to achieve the following:

to store any change into the activity table (e.g. new user is created, a user updates the metadata table)
to send notifications to users whenever a change into the users/metadata tables happens.

What are the libraries/method that I could use in order to achieve the desired functionalities? Thank you!

CodePudding user response：

in addition to django signals which wes already recommended, you can also check out django channels django activity stream

CodePudding user response：

Assuming you are making use of the Django Models, I would use the Django Signals for saving the data to a second model: "MetaData" according to your question.

Specifically the post_save signal:

https://docs.djangoproject.com/en/4.0/ref/signals/#django.db.models.signals.post_save

@receiver(post_save, sender=User)
def post_save_user(sender, instance, created, **kwargs):
    # Save Stuff To Metadata Model.
    meta = MetaData(user=instance)
    meta.save()

You need to import those signals inside your models.py placed at the bottom of the file.

As for the notifications, I would follow @kristina's advice and use Django Channels.

Just remind that your application needs to be ASGI (Async). So your application server needs to be one like uvicorn, daphne, hypercorn, etc.