How can you know if a value is the default value for a Model's property.
For example
class Alias(models.Model) :
image = models.ImageField(upload_to='alias', default='/media/alias-default.png')
a = Alias.get("123")
# this doesn't work
if a.image == a.image.default :
pass
# nor this
if a.image == Alias.image.default :
pass
I tried digging in the docs, but didn't see anything.