docs: def save(self, *args, **kwargs):
          """Saving ensures that the slug, if not set, is set to the slugified name."""
          self.clean()
  
          if not self.slug:
              self.slug = slugify(self.name)
  
          super(SpecialCoverage, self).save(*args, **kwargs)
  
          if self.query and self.query != {}:
              # Always save and require client to filter active date range
              self._save_percolator()