text: from django.contrib.auth.models import User, Group
  from rest_framework import serializers
  from radiator.models import Alarm
  
  
  class UserSerializer(serializers.HyperlinkedModelSerializer):
      class Meta:
          model = User
          fields = ('url', 'username', 'email', 'groups')
  
  
  class GroupSerializer(serializers.HyperlinkedModelSerializer):
      class Meta:
          model = Group
          fields = ('url', 'name')
  
  class AlarmSerializer(serializers.HyperlinkedModelSerializer):
      class Meta:
          model = Alarm
          fields = ('slug', 'message','description','status','order','date_created','date_updated')
  