I want to subtract two model fields in the model itself. Example :
class Purchase(models.Model):
name = models.CharField(max_length=80, unique=True)
quantity = models.IntegerField(max_length=100, null=True)
scheme = models.IntegerField(max_length=100, null=True)
rate = models.IntegerField(max_length=100, null=True)
discountPercent = models.IntegerField(max_length=100, null=True)
discount = models.IntegerField(max_length=100, null=True)
gst = models.IntegerField(max_length=100, null=True)
value = models.IntegerField(max_length=100, null=True)
date_created = models.DateTimeField(auto_now_add=True, null=True)
product_image = models.ImageField(upload_to='product_image/', null=True, blank=True)
FinalPrice = .....?
class Meta:
ordering = ('-date_created',)
def __str__(self):
return self.name
Here I want to subtract field name "rate" and "discountPercent" and store its result in a new field named "FinalPrice". I tried to do it in views but I want to it in model itself. Please Guide me for this.
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