How can I implement validation in Django models?

How can I implement validation in Django models?

In Django, you can implement validation by using the clean() method or field-specific validators. Would you like examples?

Yes, please provide an example of using the clean() method.

Sure! You can override the clean() method in your model like this:

from django.core.exceptions import ValidationError

class MyModel(models.Model):
    name = models.CharField(max_length=100)

    def clean(self):
        if not self.name:
            raise ValidationError('Name cannot be empty.')

What about using field validators?

You can use built-in validators or create custom ones. For example:

from django.core.validators import MinValueValidator

class Product(models.Model):
    price = models.DecimalField(validators=[MinValueValidator(0)])