text: from rest_framework import serializers
  from usersenders.models import UserSender
  from django.utils.translation import ugettext_lazy as _
  
  
  class UserSenderRegistrationSerializer(serializers.ModelSerializer):
      class Meta:
          model = UserSender
          fields = ("name", "age", "group")
  
      def create(self, validated_data):
          return super(UserSenderRegistrationSerializer, self).create(validated_data)
  
  
  class UserSenderGifteeAPIView(serializers.Serializer):
      name = serializers.CharField(required=True)
  
      default_error_messages = {
          'Nonexistent': _('Non existent name')
      }
  
      def __init__(self, *args, **kwargs):
          super(UserSenderGifteeAPIView, self).__init__(*args, **kwargs)
          self.userSender = None
  
      def validate(self, attrs):
          try:
              user = UserSender.objects.get_by_name(attrs.get("name"))
              user.send_to = UserSender.objects.get_giftee(user)
              self.userSender = user
              return attrs
          except:
              raise serializers.ValidationError(self.error_messages['Nonexistent'])
  