Triggering events on model field change

Hola,

I have a model with a collection of BooleanFields.

When particular fields change value I'd like to trigger an event (usually email).

A quick search shows that there are questions like this back to 09.

The two most obvious and recent solutions involve using:

 - django's from_db (https://docs.djangoproject.com/en/1.11/ref/models/instances/#customizing-model-loading)
or
 - django-model-utils (https://django-model-utils.readthedocs.io/en/latest/setup.html)

Model utils doesn't support 1.11 but that could just be a documentation oversight.

What does the crowd think?

cheers

L.

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