class FriendGiftSerializer(ModelSerializer):
    giftDisplayData = AllGiftSerializer(source='giftId', required=True)
    bestMatch = serializers.IntegerField()
    topAttribute = serializers.SerializerMethodField()

    class Meta:
        model = FriendGift
        fields = ('giftId', 'giftDisplayData', 'bestMatch', 'topAttribute')

    def get_topAttribute(self, obj):
        return self.context["top_attribute"]