Django Singleton Model

django_singleton_model.py

class SingletonModel(models.Model):
    """
    Singleton - Ensures there's always only one entry in the database, and can
    fix the table (by deleting extra entries) even if added via another mechanism.

    Has a static load() method which always returns the object - from
    the database if possible, or a new empty (default) instance if the
    database is still empty.
    """

    class Meta:
        abstract = True

    def save(self, *args, **kwargs):
        self.__class__.objects.exclude(id=self.id).delete()
        super(SingletonModel, self).save(*args, **kwargs)

    @classmethod
    def load(cls):
        try:
            return cls.objects.get()
        except cls.DoesNotExist:
            return cls()