Is there any advantage to using a decorator on models containing an ImageField?

Question

Django

Hello, I often see something like this in some code:

def contain_photos(model):
    upload_path = model.__name__.lower() + 's'
    image_field = models.ImageField(upload_to=upload_path)
    setattr(model, 'photo', image_field)


@contain_photos
class Animal(models.Model):
    pass

Does it make sense to do something like this? Or is it just simple to add an ImageField field to each model and set the appropriate path for loading images?