--(Unsigned mail from my phone) -------- Original message --------From: tech george <techgeor...@gmail.com> Date: 11/4/22 03:50 (GMT+10:00) To: django-users@googlegroups.com Subject: Calculated Fields Hello,I am trying to calculate fields directly from a model but no luck. I want to get total_price from quantity, reoder_level and unit price. My code is abelow, Please advise.class Stock(models.Model): unit_price = models.DecimalField(max_digits=10, decimal_places=2, default='0', blank=True, null=True) quantity = models.IntegerField(default='0', blank=True, null=True) total_price = models.DecimalField(max_digits=10, decimal_places=2,default=1) reorder_level = models.IntegerField(default='0', blank=True, null=True) def save(self, *args, **kwargs): self.total_price = self.quantity + self.reorder_level * self.unit_price super(Stock, self).save(*args, **kwargs)What am i my doing wrongIf it was my code, I would extract the calculation into a model method and call it from the save method as you are doing.That would make it easier to unit-test and perhaps discover that there should be parens around the addition.You also need to call save on your model to execute the code.Apart from that, at first glance your code should work.Regards,
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