Update cache after instance save

[matt-dalton]

Maybe I'm missing something obvious, but is there a way to clear the cache after saving the instance directly, instead of via the form?

We have one singleton that's updated automatically via a worker task, so doesn't go through the form. If I run this:

sgtn = MySingleton.get_solo()
sgtn.name = 'New Value'
sgtn.save()

and then I query the result using MySingleton.get_solo().name I get the previous value.

I tried overriding the save method like this:

def save(self, *args, **kwargs):
        self.clear_cache()
        super().save(*args, **kwargs)  

But that didn't work either. Is there a way of configuring this? Seems like quite a reasonable use case if not.