cached_fields.py 文件源码

def contribute_to_class(self, cls, name, **kwargs):
        super(models.ForeignKey, self).contribute_to_class(cls, name, **kwargs)
        if issubclass(cls, models.Model):
            setattr(cls, "cached_%s" % self.name,
                    property(curry(CachedModel._cached_FIELD, field=self,
                                   cache_exc=self.cache_exc)))