Django Rest Framework list serializer that allows you to specify a "source" field in the child serializer

drf_child_source_list_serializer.py

from rest_framework import serializers
from rest_framework.fields import get_attribute


class ChildSourceListSerializer(serializers.ListSerializer):
    """List serializer that respects child's `source` field"""

    def get_attribute(self, instance):
        attribute = super().get_attribute(instance)
        return [get_attribute(item, self.child.source_attrs) for item in attribute]