How can I implement advanced validation in Django REST Framework?

How can I implement advanced validation in Django REST Framework?

You can implement advanced validation by overriding the validate method in your serializer. This allows you to add custom validation logic.

Can you give me an example of how to override the validate method?

Sure! Here's a simple example:

class MySerializer(serializers.Serializer):
    name = serializers.CharField(max_length=100)

    def validate(self, data):
        if 'badword' in data['name']:
            raise serializers.ValidationError('Name cannot contain bad words.')
        return data

What if I want to validate multiple fields together?

You can still use the validate method for that. Just access the fields in the data dictionary and apply your logic accordingly.

Thanks! Is there a way to add custom error messages?

Yes! You can specify custom error messages in the ValidationError like this:

raise serializers.ValidationError({'name': 'Custom error message for name.'})