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In the case of nested serializers, is there a way to specify a method that will get the data?

class AuthorSerializer(ModelSerializer):
....

class BookSerializer(ModelSerializer):
    authors = AuthorSerializer(many=True)
....

In this example, I would like to intercept and modify how BookSerializer gets the authors. How do I accomplish this?

In the case of nested serializers, is there a way to specify a method that will get the data?

class AuthorSerializer(ModelSerializer):
....

class BookSerializer(ModelSerializer):
    authors = AuthorSerializer(many=True)
....

In this example, I would like to intercept and modify how BookSerializer gets the authors. How do I accomplish this?

• django
• django-rest-framework

Share Improve this question Follow asked Mar 24 at 18:49 David R.David R. 94599 silver badges1717 bronze badges 1

• So you want to filter these? – willeM_ Van Onsem Commented Mar 25 at 7:35

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1 Answer 1

Sorted by: Reset to default 0

If you want to filter, you typically don't do this in the serializer, but in the ViewSet, like:

from django.db.models import Prefetch
from rest_framework import viewsets


class BookViewSet(ModelViewSet):
    serializer_class = BoolSerializer
    queryset = Book.objects.prefetch_related(
        Prefetch('authors', Author.objects.filter(is_alive=True))
    )

This will also boost performance significantly, because all Authors are fetche in one additional query.

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