uncloud-mravi/uncloud_django_based/uncloud/uncloud_net/serializers.py

from django.contrib.auth import get_user_model
from rest_framework import serializers

from .models import *

class VPNProductSerializer(serializers.ModelSerializer):

    network_size = serializers.IntegerField(min_value=0,
                                            max_value=128)

    class Meta:
        model = VPNProduct
        fields = '__all__'