SOITA/trials/serializers.py

from rest_framework import serializers

from questions.serializers import QuestionSerializer
from trials.models import Test
from categories.serializers import CategorySerializer


class TestSerializer(serializers.ModelSerializer):

    questions = QuestionSerializer(many=True, required=False)
    category = CategorySerializer(required=False)

    class Meta:
        model = Test
        fields = (
            "id",
            "name",
            "passing_score",
            "questions",
            "category",
        )

    def create(self, validated_data):
        instance = Test.objects.create(
            **validated_data
        )
        return instance