from rest_framework import serializers class InspectionSerializer(serializers.Serializer): tires = serializers.CharField(required=False, allow_blank=True, default="Qoniqarli") engine = serializers.CharField(required=False, allow_blank=True, default="Qoniqarli") chassis = serializers.CharField(required=False, allow_blank=True, default="Qoniqarli") transmission = serializers.CharField(required=False, allow_blank=True, default="Qoniqarli") body = serializers.CharField(required=False, allow_blank=True, default="Qoniqarli") class ContractPDFRequestSerializer(serializers.Serializer): inspection = InspectionSerializer(required=False)