Backend/addresses/api/serializers.py

from rest_framework import serializers
from ..models import Address, City, Province


class ProvinceSerializer(serializers.ModelSerializer):
     class Meta:
        model = Province
        fields = ["province_id", "province_name"]


class CitySerializer(serializers.ModelSerializer):
    province_id = serializers.CharField(source="province.province_id")
    class Meta:
        model = City
        fields = ["city_local_id", "city_name", "province_id"]

class AddressSerializer(serializers.ModelSerializer):
    province_name = serializers.CharField(source="province.province_name", read_only=True)
    city_name = serializers.CharField(source="city.city_name", read_only=True)
    user_email = serializers.EmailField(source="user.email", read_only=True)
    absolute_url = serializers.SerializerMethodField(method_name="get_absolute_url", read_only=True)
    relative_url = serializers.URLField(source="get_absolute_relative_url")
    class Meta:
        model = Address
        fields = ["province", "province_name", "city", "city_name", "postal_code", "address_detail", "relative_url", "absolute_url", "user_email", "created_at", "updated_at"]
        read_only_fields = ["user_email", "absolute_url", "province_name", "city_name", "created_at", "updated_at"]

    def to_representation(self, instance):
        rep = super().to_representation(instance)
        request = self.context.get("request")
        if not request.parser_context.get("kwargs"):
            rep.pop("province_name")
            rep.pop("city_name")
            rep.pop("created_at")
            rep.pop("updated_at")

        else:
            rep.pop("absolute_url")
            rep.pop("relative_url")
        
        return rep

    def get_absolute_url(self, obj):
        request = self.context.get("request")
        return request.build_absolute_uri(obj.pk)