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将对象的URL转换为其数据库实例

django-views django-rest-framework django-models django python

0

Tavy · 技术社区 · 8 年前

class ResourceViewSet(viewsets.ModelViewSet):
    queryset = Resource.objects.all()
    serializer_class = ResourceSerializer

    @action(methods=['put'], detail=True)
    def groups_append(self, request, pk=None):
        instance = self.get_object()
        groups = request.data.get("groups")
        for resource_group in groups:
            instance.groups.add(WHAT_HERE(resource_group))
        instance.save()
        return Response(self.get_serializer(instance, many=False).data)

请求如下:

PUT    http://.../api/resources/1/groups_append/

带主体:

{"groups": ["http://.../api/resource_groups/1/", ...]}

资源序列化程序:

class ResourceSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = Resource
        fields = ('resource_id', 'object_id', 'type', 'system', 'path', 'groups', 'job_set')

    def update(self, instance, validated_data):
        instance.object_id = validated_data.get('object_id', instance.object_id)
        instance.type = validated_data.get('type', instance.type)
        instance.system = validated_data.get('system', instance.system)
        instance.path = validated_data.get('path', instance.path)
        instance.save()
        return instance

资源组序列化程序:

class ResourceGroupSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = ResourceGroup
        fields = ('resource_group_id', 'label', 'resource_set')

    def update(self, instance, validated_data):
        instance.label = validated_data.get('label', instance.label)
        instance.save()
        return instance

1 回复 | 直到 8 年前

1

Ehsan Nouri 8 年前

使用 HyperlinkedRelatedField 对于中的组 ResourceSerializer 或者只是为此操作创建一个新的序列化程序(主要思想是使用序列化程序而不是直接从请求体获取数据),如下所示:

class ResourceSerializer(serializers.HyperlinkedModelSerializer):

    groups = serializers.HyperlinkedRelatedField(
        many=True,
        read_only=True,
        view_name='groups-detail' ## name of the groups detail url
    )
    class Meta:
        model = Resource
    ....

@action(methods=['put'], detail=True)
def groups_append(self, request, pk=None):
    instance = self.get_object()
    serializer = self.get_serializer(instance, data=request.data, partial=True)
    serializer.is_valid(raise_exception=True)
    ### then get the groups from the validated data
    groups = serializer.validated_data.get('groups', [])
    ....
    ....

参考文献:

1- hyperlinkedrelatedfield