Admin is still annoying regarding model save(), and model post_save signals.

[Luis Masuelli]

If you want to perform additional logic when you save your model...

   

class MyModel(models.Model):

    #...

    def save(self, *args, **kwargs):
        self.a_rel_model_set.add(O)
        super(MyModel, self).save(*args, **kwargs)
        self.another_rel_model_set.add(O2)

Or similar login in pre_save and post_save signals, since they are many2many fields, they will be overriden on an admin form, since the form.save_m2m is called after the model save, and whatever changes I do on those signals, will be wiped out.

The logic I had to put it in log_change (ModelAdmin method). I don't know whether it is the appropriate method, but is the first method executed after model saving. Is it the appropriate method for that? Admin post-save logic... or should we have an additional method in the admin for that?

[Luis Masuelli]

Notes: This is only annoying when the logic involves many2many fields.