贾斯汀·哈马德斯（JustinHamades）答案
class PO(models.Model) qty = models.IntegerField(null=True) cost = models.IntegerField(null=True) @property def total(self): return self.qty * self.cost
贾斯汀·哈马德斯（JustinHamades）答案
class PO(models.Model) qty = models.IntegerField(null=True) cost = models.IntegerField(null=True) @property def total(self): return self.qty * self.cost
名师互学网 版权所有 (c)2021-2022 ICP备案号：晋ICP备2021003244-6号
