Nested serializers in Django - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the serializer base class.

Django

from rest_framework import [1]

Drag options to blanks, or click blank then click option'

Amodels

Bserializers

Cviews

Dfields

Attempts:

3 left

💡 Hint

Common Mistakes

Importing models instead of serializers

Using views instead of serializers

The serializers module contains the base classes for creating serializers in Django REST Framework.

2fill in blank

medium

Complete the code to define a nested serializer field.

Django

class BookSerializer(serializers.ModelSerializer):
    author = [1](read_only=True)

    class Meta:
        model = Book
        fields = ['title', 'author']

Drag options to blanks, or click blank then click option'

AIntegerField

BCharField

CSerializerMethodField

DAuthorSerializer

Attempts:

3 left

💡 Hint

Common Mistakes

Using CharField instead of a serializer for nested data

Using SerializerMethodField without defining the method

To nest a serializer inside another, you use the nested serializer class as a field.

3fill in blank

hard

Fix the error in the nested serializer to allow writing nested data.

Django

class AuthorSerializer(serializers.ModelSerializer):
    class Meta:
        model = Author
        fields = ['name']

class BookSerializer(serializers.ModelSerializer):
    author = AuthorSerializer([1]=True)

    class Meta:
        model = Book
        fields = ['title', 'author']

Drag options to blanks, or click blank then click option'

Arequired

Bwrite_only

Cmany

Dread_only

Attempts:

3 left

💡 Hint

Common Mistakes

Setting read_only=True disables writing nested data

Using many=True when the relation is not multiple

To allow writing nested data, the nested serializer field should not be read-only. Setting required=True ensures the field is expected during input.

4fill in blank

hard

Fill both blanks to correctly override the create method for nested data.

Django

class BookSerializer(serializers.ModelSerializer):
    author = AuthorSerializer()

    def create(self, validated_data):
        author_data = validated_data.pop([1])
        author = Author.objects.create([2])
        book = Book.objects.create(author=author, **validated_data)
        return book

Drag options to blanks, or click blank then click option'

A'author'

Bauthor_data

Cvalidated_data

D'book'

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong key to pop nested data

Passing wrong data to create method

We pop the nested author data from validated_data using the key 'author', then create the Author instance using that data.

5fill in blank

hard

Fill all three blanks to correctly override the update method for nested serializers.

Django

class BookSerializer(serializers.ModelSerializer):
    author = AuthorSerializer()

    def update(self, instance, validated_data):
        author_data = validated_data.pop([1])
        author = instance.author
        author.name = author_data.get([2], author.name)
        author.save()
        instance.title = validated_data.get([3], instance.title)
        instance.save()
        return instance

Drag options to blanks, or click blank then click option'

A'author'

B'name'

C'title'

D'author_data'

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect keys for nested data

Not saving updated instances

We pop the nested author data using 'author', update the author's name using the key 'name', and update the book's title using 'title'.