uncloud-mravi/uncloud/uncloud_pay/serializers.py

from rest_framework import serializers
from .models import Bill, Payment

class BillSerializer(serializers.ModelSerializer):
    class Meta:
        model = Bill
        fields = ['owner', 'amount']

class PaymentSerializer(serializers.ModelSerializer):
    class Meta:
        model = Payment
        fields = ['owner', 'amount', 'source', 'timestamp']