Nested serializers in Django - Mini Project: Build & Apply

Nested serializers

📖 Scenario: You are building a simple API for a bookstore. Each book has a title and an author. The author has a name and an email. You want to send book data along with the author's details in one response.

🎯 Goal: Create nested serializers in Django REST Framework to show book details with the author's information inside.

📋 What You'll Learn

Create a serializer for the Author model with fields name and email.

Create a serializer for the Book model with fields title and a nested author serializer.

Use the nested serializer inside the Book serializer to include author details.

Ensure the serializers follow Django REST Framework patterns.

💡 Why This Matters

🌍 Real World

APIs often need to send related data together, like a book with its author details. Nested serializers make this easy and clean.

💼 Career

Understanding nested serializers is essential for backend developers working with Django REST Framework to build APIs that serve complex data.

1

Create Author serializer

Create a serializer class called AuthorSerializer that inherits from serializers.Serializer. Add two fields: name as a serializers.CharField() and email as a serializers.EmailField().

Django

# Your code here

Need a hint?

Define a class inheriting from serializers.Serializer. Add fields as class attributes.

2

Create Book serializer with author field

Create a serializer class called BookSerializer that inherits from serializers.Serializer. Add a field title as serializers.CharField(). Also add a field author but do not define it yet.

Django

from rest_framework import serializers

class AuthorSerializer(serializers.Serializer):
    name = serializers.CharField()
    email = serializers.EmailField()

# Your code here

Need a hint?

Define BookSerializer with title field and add an author attribute placeholder.

3

Nest AuthorSerializer inside BookSerializer

In the BookSerializer class, replace the author field with an instance of AuthorSerializer() to nest the author details inside the book serializer.

Django

from rest_framework import serializers

class AuthorSerializer(serializers.Serializer):
    name = serializers.CharField()
    email = serializers.EmailField()

class BookSerializer(serializers.Serializer):
    title = serializers.CharField()
    # Replace author = None with nested serializer
    author = None

Need a hint?

Assign author = AuthorSerializer() inside BookSerializer.

4

Complete nested serializers setup

Ensure the full code includes imports, AuthorSerializer with name and email, and BookSerializer with title and nested author = AuthorSerializer().

Django

from rest_framework import serializers

class AuthorSerializer(serializers.Serializer):
    name = serializers.CharField()
    email = serializers.EmailField()

class BookSerializer(serializers.Serializer):
    title = serializers.CharField()
    author = AuthorSerializer()

# Your code here if needed

Need a hint?

Review the full code to confirm nested serializers are correctly set up.