如何在DRF中添加序列化器字段以获取不发布

Question

我正在处理现有的DRF代码库，并想添加last_build字段以仅在Get请求中返回。我不希望这会影响与发布请求有关的任何事情。我创建了一种返回我要寻找的字段并成功测试它返回我想要的数据的方法，但是我尚未测试这是否会影响现有的POST请求。

class JobSerializer(serializers.ModelSerializer):
    name = serializers.CharField(required=True, max_length=150)
    product = ProductSerializer(many=False, required=True)
    platform = PlatformSerializer(many=False, required=True)
    stages = StageSerializer(many=True, required=False)
    last_build = serializers.SerializerMethodField()
    def get_last_build(self, name):
        latest_build = JobExecution.manager.filter(job__name=name.name)
        return latest_build.last().build_id
    class Meta:
        model = Job
        fields = ("name", "product", "platform", "stages", "last_build")
        validators = [
            UniqueTogetherValidator(
                queryset=Job.manager.all(), fields=("name", "platform", "product")
            )
        ]
    def create(self, validated_data):
        # Create objects from data
        try:
            product_data = validated_data.pop("product", None)
            if product_data:
                ps = ProductSerializer()
                validated_data["product"] = ps.create(product_data)
            else:
                logger.exception("product is not valid")
            platform_data = validated_data.pop("platform", None)
            if platform_data:
                ps = PlatformSerializer()
                validated_data["platform"] = ps.create(platform_data)
            else:
                logger.exception("platform is not valid")
            stage_data = validated_data.pop("stages", [])
            stages = []
            the_job = Job.manager.get_or_create(**validated_data)[0]
            if stage_data:
                for stage_data in stage_data:
                    ss = StageSerializer()
                    stage_data["job"] = the_job
                    the_stage = ss.create(stage_data)
            return the_job
        except Exception as e:
            logger.exception(e)
            raise e

这是张贴的API视图的片段：

class JobView(GenericAPIView):
    def post(self, request, format=None):
        serializer = JobSerializer(data=request.data)
        logger.debug(request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data, status=status.HTTP_201_CREATED)
        else:
            logger.info("POST request for Job failed: %s", serializer.errors)
            return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

Answer 1

您可以添加一些用于跳过/put/patch请求的序列化方法的字段。添加必需= false 用于跳过检查数据， read_only = true for skip post request。

示例：

class JobSerializer(serializers.ModelSerializer):
    name = serializers.CharField(required=True, max_length=150)
    product = ProductSerializer(many=False, required=True)
    platform = PlatformSerializer(many=False, required=True)
    stages = StageSerializer(many=True, required=False)
    last_build = serializers.SerializerMethodField(required=False, read_only=True)