def all(self): return Quantity.select().where(Quantity.class_name == self.name)
def orphans(self): return Quantity.select().where(Quantity.class_name == self.name, ~(Quantity.key << self._key_query()))
def all(self): return Quantity.select().where(Quantity.class_name == self.name)
def orphans(self): return Quantity.select().where(Quantity.class_name == self.name, ~(Quantity.key << self._key_query()))