服务器一对多与多对多处理

 如上图中这是我运维平台服务器接口返回的单条数据，但是这个数据里少了网卡设备和多Ip字段，那我的网卡设备有几种展现方式，怎么展现?--这里我想要以如下的形式展现：

[
    {
        "id": 1,
        "ip": "192.168.1.9",
        "hostname": "yz-ms-web-09",
        "cpu": "Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz 1",
        "mem": "2G",
        "disk": "100G",
        "os": "centos 7",
        "sn": "B49479B2-D774-4B09-B7B9-F29384350C01",
        "rmt_card_ip": "",
        "cabinet_position": null,
        "uuid": "B49479B2-D774-4B09-B7B9-F29384350C01",
        "last_check": "2020-06-30T01:39:29.826163Z",
        "remark": null,
        "manufacturer": 1,
        "model_name": 1,
        "idc": null,
        "cabinet": null,
        "device": [
            {
                "name": "eth0"
                "mac": "",
                "ips": [
                    {"ip":"192.168.1.1", "netmask":"255.255.255.0"}
                    {"ip":"192.168.1.2", "netmask":"255.255.255.0"}
                    {}
                ],
                "name": "eth1"
                "mac": "",
                "ips": [
                    {"ip":"192.168.1.1", "netmask":"255.255.255.0"}
                    {"ip":"192.168.1.2", "netmask":"255.255.255.0"}
                    {}
                ]
            },
            {}
        ],
    }
]

　　网卡跟服务器是一对多的关系(一对多和多对多的处理方式是一样的).

一.一对多数据处理:

1.apps/servers/serilaizers.py

from rest_framework import serializers
from .models import Manufacturer, ProductModel
from rest_framework import  serializers

from .models import Server,NetworkDevice,IP


class ServerAutoReportSerializer(serializers.Serializer):
    """
    服务器同步序列化类
    """
    ip          = serializers.IPAddressField(required=True)
    hostname    = serializers.CharField(required=True, max_length=20)
    cpu         = serializers.CharField(required=True, max_length=50)
    mem         = serializers.CharField(required=True, max_length=20)
    disk        = serializers.CharField(required=True, max_length=200)
    os          = serializers.CharField(required=True, max_length=50)
    sn          = serializers.CharField(required=True, max_length=50)
    manufacturer= serializers.CharField(required=True)
    model_name  = serializers.CharField(required=True)
    uuid        = serializers.CharField(required=True, max_length=50)
    network     = serializers.JSONField(required=True)

    def validate_manufacturer(self, value):
        try:
            return Manufacturer.objects.get(vendor_name__exact=value)
        except Manufacturer.DoesNotExist:
            return self.create_manufacturer(value)

    def validate(self, attrs):
        manufacturer_obj = attrs["manufacturer"]
        try:
            attrs["model_name"] = manufacturer_obj.productmodel_set.get(model_name__exact=attrs["model_name"])
        except ProductModel.DoesNotExist:
            attrs["model_name"] = self.create_product_model(manufacturer_obj, attrs["model_name"])
        return attrs

    def create_server(self, validated_data):
        network = validated_data.pop("network")
        server_obj = Server.objects.create(**validated_data)
        self.check_server_network_device(server_obj, network)
        return server_obj

    def create(self, validated_data):
        uuid = validated_data["uuid"].lower()
        sn   = validated_data["sn"].lower()

        try:
            if sn == uuid or sn == "" or sn.startswith("vmware"):
                server_obj = Server.objects.get(uuid__icontains=uuid)
            else:
                server_obj = Server.objects.get(sn__icontains=sn)
        except Server.DoesNotExist:
            return self.create_server(validated_data)
        else:
            return self.update_server(server_obj, validated_data)

    def update_server(self, instance, validated_data):
        instance.hostname = validated_data.get("hostname", instance.hostname)
        instance.cpu = validated_data.get("cpu", instance.cpu)
        instance.ip = validated_data.get("ip", instance.ip)
        instance.mem = validated_data.get("mem", instance.mem)
        instance.disk = validated_data.get("disk", instance.disk)
        instance.os = validated_data.get("os", instance.os)
        instance.save()
        self.check_server_network_device(instance, validated_data["network"])
        return instance

    def check_server_network_device(self,server_obj, network):
        """
        检查批定服务器有没有这些网卡设备，并作关联
        """
        network_device_queryset = server_obj.networkdevice_set.all()
        current_network_device_queryset = []
        for device in network:
            try:
                network_device_obj = network_device_queryset.get(name__exact=device["name"])
            except NetworkDevice.DoesNotExist:
                network_device_obj = self.create_network_device(server_obj, device)
            self.check_ip(network_device_obj, device["ips"])
            current_network_device_queryset.append(network_device_obj)

        for network_device_obj in list(set(network_device_queryset) - set(current_network_device_queryset)):
            network_device_obj.delete()

    def check_ip(self, network_device_obj, ifnets):
        ip_queryset = network_device_obj.ip_set.all()
        current_ip_queryset = []
        for ifnet in ifnets:
            try:
                ip_obj = ip_queryset.get(ip_addr__exact=ifnet["ip_addr"])
            except IP.DoesNotExist:
                ip_obj = self.create_ip(network_device_obj, ifnet)
            current_ip_queryset.append(ip_obj)

        for ip_obj in list(set(ip_queryset) - set(current_ip_queryset)):
            ip_obj.delete()

    def create_ip(self, network_device_obj, ifnet):
        ifnet["device"] = network_device_obj
        return IP.objects.create(**ifnet)


    def create_network_device(self,server_obj, device):
        device.pop("ips")
        device["host"] = server_obj
        network_device_obj = NetworkDevice.objects.create(**device)
        return network_device_obj


    def create_manufacturer(self, vendor_name):
        return Manufacturer.objects.create(vendor_name=vendor_name)

    def create_product_model(self,manufacturer_obj, model_name):
        return ProductModel.objects.create(model_name=model_name, vendor=manufacturer_obj)

    def to_representation(self, instance):
        ret = {
            "hostname": instance.hostname,
            "ip": instance.ip
        }
        return ret

class ServerSerializer(serializers.ModelSerializer):
    """
    服务器序列化类
    """
    def get_network_device(self, serveer_obj):
        ret = []
        network_device = serveer_obj.networkdevice_set.all()
        for device in network_device:
            data = {
                "name": device.name,
                "mac": device.mac_address,
                "ips": self.get_ip(device)
            }
            ret.append(data)
        return ret
    def get_ip(self, network_device_obj):
        ret = []
        for ifnet in network_device_obj.ip_set.all():
            data = {
                "ip": ifnet.ip_addr,
                "netmask": ifnet.netmask
            }
            ret.append(data)
        return ret

    def to_representation(self, instance):
        ret = super(ServerSerializer, self).to_representation(instance)
        ret["device"] = self.get_network_device(instance)
        return ret
    class Meta:
        model =  Server
        fields = "__all__"


class NetworkDeviceSerializer(serializers.ModelSerializer):
    """
    网卡序列化
    """
    class Meta:
        model =  NetworkDevice
        fields = "__all__"

class IPSerializer(serializers.ModelSerializer):
    """
    IP序列化
    """
    class Meta:
        model =  IP
        fields = "__all__"

最终展示的效果就如下图了

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