How can I validate models in Django?

How can I validate models in Django?

In Django, you can validate models by using the clean() method or field-specific validators.

Can you give me an example of using the clean() method?

Sure! You can override the clean() method in your model to add custom validation logic. For example:

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 like MaxLengthValidator or create custom validators. For example:

from django.core.validators import MaxLengthValidator

class MyModel(models.Model):
    name = models.CharField(max_length=100, validators=[MaxLengthValidator(50)])