planetstack/core/models/singletonmodel.py

   1 from django.db import models
   2
   3 class SingletonModel(models.Model):
   4     class Meta:
   5         abstract = True
   6
   7     def save(self, *args, **kwargs):
   8         self.__class__.objects.exclude(id=self.id).delete()
   9         super(SingletonModel, self).save(*args, **kwargs)
  10
  11     @classmethod
  12     def load(cls):
  13         try:
  14             return cls.objects.get()
  15         except cls.DoesNotExist:
  16             return cls()