from django.db import models
class Product(models.Model):
name = models.CharField(max_length=255)
price = models.IntegerField()
discounted_price = models.IntegerField()
class Meta:
constraints = [
models.CheckConstraint(
check=models.Q(price__gt=models.F('discounted_price')),
name='price_gt_discounted_price',
),
]