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Django DRF 有关反向查询的问题

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walker1024
walker1024Django Double会员2019年3月12日 16:32
啦啦啦啦,我是卖报得小行家

我有两张表,Instances和DataDisk,如下:

class Instances(models.Model):
    instance_id = models.CharField("服务器ID", unique=True, max_length=100, help_text="服务器ID")
    # project_id = models.ForeignKey("项目名称", Projects, to_fields='project_id')
    project = models.ForeignKey(Projects, max_length=100, help_text="项目")
    application = models.CharField("应用名称", max_length=10, help_text="应用名称")
    system = models.CharField("操作系统", max_length=100, help_text="操作系统")
    cpu_info = models.CharField("CPU信息", max_length=100, help_text="CPU信息")
    mem_info = models.CharField("内存信息", max_length=100, help_text="内存信息")
    disk_size = models.CharField("系统盘大小", max_length=100, help_text="系统盘大小")
    disk_type = models.CharField("系统盘类型", max_length=30, help_text="系统盘类型")
    disk_id = models.CharField("系统盘ID", max_length=50, help_text="系统盘ID")
    wip = models.GenericIPAddressField("外网IP", null=True, blank=True, help_text="外网IP")
    nip = models.GenericIPAddressField("内网IP", null=True, blank=True, help_text="内网IP")
    vpc_id = models.CharField("vpcid",null=True, blank=True, max_length=100, help_text="vpcid")
    subnet_id = models.CharField("子网ID", null=True, blank=True, max_length=100, help_text="子网ID")
    cidr = models.CharField("子网网段", null=True, blank=True, max_length=100, help_text="子网网段")
    region = models.CharField("区域", max_length=30, help_text="区域")
    zone = models.CharField("可用区域", max_length=30, help_text="可用区域")
    status = models.CharField("状态", max_length=10, help_text="状态")
    create_time = models.DateTimeField("创建日期", help_text="创建日期")
    update_time = models.DateTimeField("更新日期", auto_now=True)

    def __str__(self):
        return '{project}-{instanceid}-'.format(project=self.project.name, instanceid=self.instance_id)

    class Meta:
        db_table = "instances"
class DataDisk(models.Model):

    disk_type = models.CharField("数据盘类型", max_length=20, help_text="数据盘类型")
    disk_id = models.CharField("数据盘ID", max_length=50, help_text="数据盘ID")
    disk_size = models.CharField("数据盘大小", max_length=50, help_text="数据盘大小")
    host = models.ForeignKey(Instances, help_text="主机", on_delete=models.CASCADE)

    def __str__(self):
        return '{host}-{disk_id}-'.format(host=self.host.application, disk_id=self.disk_id)

    class Meta:
        db_table = "datadisks"

serializers文件内容如下:

class InstancesSerializer(serializers.ModelSerializer):
    """
        服务器序列化类
        """
    # data_disk = serializers.PrimaryKeyRelatedField(many=True, read_only=True)
    class Meta:
        model = Instances
        fields = "__all__"


class DatadiskSerializer(serializers.ModelSerializer):
    """
    数据盘序列化类
    """

    class Meta:
        model = DataDisk
        fields = "__all__"

views内容如下:

class InstancesViewset(viewsets.ReadOnlyModelViewSet):
    """
    list:
        列出所有服务器信息
    retrieve:
        读取一个服务器信息
    """
    queryset = Instances.objects.all()
    serializer_class = InstancesSerializer

class DatadiskViewset(viewsets.ReadOnlyModelViewSet):
    """
    list:
        列出所有硬盘信息
    retrieve:
        读取一个硬盘信息
    """
    queryset = DataDisk.objects.all()
    serializer_class = DatadiskSerializer

我如何访问服务器信息时,把该服务器所关联的硬盘也显示出来? https://sss.the5fire.com/v_the5fire/8f6622dbc20a7c8b9571e03fcca552f8.png

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