Question

im试图将相关集合加载到序列化器中，因此整个集合将作为嵌套字典出现在父序列下。

我目前没有任何错误，但是我的api也根本没有为circuits_subnets返回任何数据。

有什么想法吗？谢谢

编辑

我添加了一个嵌套的序列化程序，但是api仍然没有显示错误和数据

views.py：

from selenium import webdriver
from selenium.webdriver.support.ui import Select

driver = webdriver.Firefox()
driver.get('url')

driver.find_element_by_xpath("xpath_of_dropdownlist").click()

select_Add = Select(driver.find_element_by_id("Address 1"))

select_Add.select_by_index(0)

serializers.py

class DeviceConnViewSet(viewsets.ReadOnlyModelViewSet):
    # sub queries    
    poll_ip = Subquery(
        DeviceCircuitSubnets.objects.filter(device_id=OuterRef(
            'id'),subnet__subnet_type__poll=True).values('subnet__subnet')[:1])
    mgmt_ip = Subquery(
        DeviceCircuitSubnets.objects.filter(device_id=OuterRef(
            'id'),subnet__subnet_type__mgmt=True).values('subnet__subnet')[:1])   
    queryset = Device.objects.all().annotate(
                                    poll_ip=poll_ip,
                                    mgmt_ip=mgmt_ip
                                ) \
                                .select_related('site','site__site_type','model','model__device_type') \
                                .prefetch_related('devicecircuitsubnets_set') \
                                .order_by('site__location')  

    serializer_class = DeviceConn

API输出示例

class CircuitSubnetsSerializer(serializers.ModelSerializer):
    circuit_name = serializers.ReadOnlyField(
        source='circuit.name',
    )
    subnet = serializers.ReadOnlyField(
        source='subnet.subnet',
    )
    subnet_mask = serializers.ReadOnlyField(
        source='subnet.mask',
    )
    subnet_type = serializers.ReadOnlyField(
        source='subnet.subnet_type.subnet_type',
    )
    class Meta:
        model = DeviceCircuitSubnets
        fields = ('circuit_name', 'subnet','subnet_mask','subnet_type')

class DeviceConn(QueryFieldsMixin, serializers.HyperlinkedModelSerializer):
    poll_ip = serializers.ReadOnlyField()
    mgmt_ip = serializers.ReadOnlyField()
    bgp_as = serializers.ReadOnlyField(
        source='site.bgp_as',
    )
    location = serializers.ReadOnlyField(
        source='site.location',
    )
    site_type = serializers.ReadOnlyField(
        source='site.site_type.site_type',
    )
    device_type = serializers.ReadOnlyField(
        source='model.device_type.device_type_plural',
    )
    circuit_subnets = CircuitSubnetsSerializer(many=True, read_only=True)

    class Meta:
        model = Device   
        fields = ('site_id','poll_ip','mgmt_ip','bgp_as','hostname', 'device_type','location','site_type','circuit_subnets')

Answer 1

在DeviceConn序列化器上，添加一个字段以表示要序列化的关系：

class DeviceConn(serializers.HyperlinkedRelatedField):
    your_related_field = serializers.HyperlinkedRelatedField(many=True, 
    read_only=True, view_name=my_view)
    class Meta:
       fields = `__all__` # or add only the fields you want.

See more here

Django Rest-如何序列化预取相关集？

1 个答案: