sarlink-portal-api/billing/serializers.py

from rest_framework import serializers
from .models import Payment, Topup
from devices.serializers import DeviceSerializer
from api.serializers import CustomReadOnlyUserSerializer


class PaymentSerializer(serializers.ModelSerializer):
    devices = DeviceSerializer(many=True, read_only=True)

    class Meta:  # type: ignore
        model = Payment
        fields = "__all__"


class UpdatePaymentSerializer(serializers.ModelSerializer):
    class Meta:  # type: ignore
        model = Payment
        fields = [
            "number_of_months",
        ]


class TopupSerializer(serializers.ModelSerializer):
    user = CustomReadOnlyUserSerializer(read_only=True)

    class Meta:  # type: ignore
        model = Topup
        fields = [
            "id",
            "amount",
            "user",
            "paid",
            "mib_reference",
            "created_at",
            "updated_at",
        ]
        read_only_fields = ["id", "created_at", "updated_at"]