How can I customize serializers in Django REST Framework?

How can I customize serializers in Django REST Framework?

You can customize serializers in Django REST Framework by creating a subclass of serializers.Serializer or serializers.ModelSerializer. This allows you to define your own fields, validation, and serialization logic.

Can you give me an example of a custom serializer?

Sure! Here's a simple example:

from rest_framework import serializers

class CustomUserSerializer(serializers.ModelSerializer):
    class Meta:
        model = User
        fields = ['id', 'username', 'email']

    def validate_email(self, value):
        if '@example.com' in value:
            raise serializers.ValidationError('Email cannot be from example.com')
        return value

What if I want to add a new field that isn't in the model?

You can add a new field by defining it in your serializer class. For example:

class CustomUserSerializer(serializers.ModelSerializer):
    full_name = serializers.CharField(source='get_full_name', read_only=True)

    class Meta:
        model = User
        fields = ['id', 'username', 'email', 'full_name']