Signals not working for Follow model, potentially others as well.

[cdrandin]

I am using Python 3.7.1, Django 2.0.9
This issue apparently was mentioned, but haven't seen any changes to deal with it.

I am trying to use the following signals follower_created, followee_created, following_created.

I connected it like this

@receiver([follower_created, followee_created, following_created], sender=Follow)
def on_following_created(sender, **kwargs):
    print('on_following_created')
    print(kwargs)

I was able to get it to work by changing how the signals were being triggered in the models.py

follower_created.send(sender=self, follower=follower)
followee_created.send(sender=self, followee=followee)
following_created.send(sender=self, following=relation)

to

follower_created.send(sender=self.model, follower=follower)
followee_created.send(sender=self.model, followee=followee)
following_created.send(sender=self.model, following=relation)

assuming the ideal usage:

@receiver(..., sender=Follow)

is for sender to be the model.

Without making any changes to how the signals are triggered.
Connecting would just be

@receiver(..., sender=Follow.objects) # looks weird, but works (not sure intentional usage)

I have not checked the other signals, but I believe any signal being triggered as .send(sender=self) should be changed to .send(sender=self.model).

Edit:

I also tried with follower_removed, followee_removed, following_removed and it does not work with the following connection

@receiver([follower_removed, followee_removed, following_removed], sender=Follow)
def deleteFollowNotification(sender, **kwargs):
    print('deleteFollowNotification')
    print(kwargs)

I had to change

follower_removed.send(sender=rel, follower=rel.follower)
followee_removed.send(sender=rel, followee=rel.followee)
following_removed.send(sender=rel, following=rel)

to

follower_removed.send(sender=rel._meta.model, follower=rel.follower)
followee_removed.send(sender=rel._meta.model, followee=rel.followee)
following_removed.send(sender=rel._meta.model, following=rel)

@receiver([follower_removed, followee_removed, following_removed], sender=Follow.objects) # using Follow.objects

doesn't work either.

in models.py

rel = Follow.objects.get(follower=follower, followee=followee)

is an instance and I have no way of triggering follower_removed, followee_removed, following_removed.

Either sender in .send(sender=MyModel) needs to always be the model class or I am using these signals incorrectly.

I have checked Django release notes and haven't found anything that would change how signals work.