Question

我正在使用Django REST Framework来覆盖我的视图类中的get_serializer_context（）方法，在下面（view.py），所以我可以将一个额外的上下文变量传递给下面的序列化器（serializer.py），但我是在我的API生成浏览器的结果时收到空值。我的结果如下（结果）。任何帮助将不胜感激。

view.py

class TaskListMixin(object):
    s1 = Schedule.objects.get(pk=1)
    r1 = Room.objects.get(pk=2)
    sp1 = r1.spacetype.pk
    s = Space.objects.get(pk = sp1)
    queryset = s.task.all()
    serializer_class = SimpleSerializer3
    permission_classes = (permissions.IsAuthenticated,)


class TaskListViewSet(TaskListMixin, generics.BulkModelViewSet):

    def get_serializer_context(self):
        context = super(TaskListViewSet, self).get_serializer_context()
        return {'request' : 'test'}

serializer.py

class SimpleSerializer3(BulkSerializerMixin, ModelSerializer):


is_my_object = serializers.SerializerMethodField()

def get_is_my_object(self, obj):
    test_me = self.context.get('request')


class Meta(object):
    model = Task
    list_serializer_class = BulkListSerializer
    fields = ('pk','task_name', 'is_my_object')

结果

[
{
    "pk": 1,
    "task_name": "Remove large debris from floor",
    "is_my_object": null
},
{
    "pk": 2,
    "task_name": "Clean walls and horizontal surfaces",
    "is_my_object": null
},
{
    "pk": 3,
    "task_name": "Clean touch points",
    "is_my_object": null
},
{
    "pk": 4,
    "task_name": "Empty trash container",
    "is_my_object": null
},
{
    "pk": 6,
    "task_name": "Spot clean desks/furniture",
    "is_my_object": null
},
{
    "pk": 7,
    "task_name": "High/Low dust",
    "is_my_object": null
}
]

Answer 1

您正在获取视图上下文，但没有通过更新返回它。

   def get_serializer_context(self):
        context = super(TaskListViewSet, self).get_serializer_context()
        context.update({'request' : 'test'})
        return context

Answer 2

我解决了这个问题。我没有从get_is_my_object（self，obj）返回值

def get_first_name(self, obj):
    test_me = self.context.get('request')
    return test_me

如何从View中将额外的上下文传递给Django Rest Serializer

2 个答案: