Can I manually trigger signals in Django?

Question

I've written some signals in my Django app that are supposed to send out an email when a particular model instance is created or modified, but the signal receiver function doesn't seem to be responding; at any rate, I'm not getting any emails through (although I have already checked that I'm able to send emails with my current configuration).

Anyhow; I wondered, is it possible to manually send a post_save signal for debugging purposes, rather than trying to trigger it by creating a new model instance each time? Thanks!

score 63 · Accepted Answer · edited Apr 13 '19 at 21:55

63

Yes. See the documentation:

from django.db.models.signals import post_save

instance = MyModel(field='qwerty')
post_save.send(MyModel, instance=instance, created=True)

edited Apr 13 '19 at 21:55

Artem Bernatskyi

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answered Jan 16 '15 at 15:57

catavaran

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Ah! I read the Django docs on signals a few times but somehow I didn't grok that - seems obvious in retrospect. Thanks! :) – david_hughes Jan 16 '15 at 16:20
can't i just do instance.save() to trigger it?? – Vaibhav Vishal Oct 12 '18 at 08:33
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@VaibhavVishal That would result in an unnecessary, slow and expensive DB roundtrip – Patrick Feb 01 '19 at 13:08
This is exactly what I was looking for. – enchance Aug 16 '20 at 01:58

Can I manually trigger signals in Django?

1 Answers1