我有以下简单的待办事项列表模型:
class TodoList(models.Model):
id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
title = models.CharField(max_length=255)
class Todo(models.Model):
id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
todo_title = models.CharField(max_length=64)
todo_body = models.TextField()
completed = models.BooleanField(default=False)
list = models.ForeignKey(TodoList, on_delete=models.CASCADE, related_name='messages')
我想做的是使用drf-nested-routers设置嵌套路由。例如:
/api/v1/todo-lists/ <- List Todo Lists
/api/v1/todo-lists/{LIST_ID}/ <- CRUD a Todo list
/api/v1/todo-lists/{LIST_ID}/todos/ <- List todos for a particular list
/api/v1/todo-lists/{LIST_ID}/todos/{TODO_ID}/ <- CRUD for a particular todo
我有一个 Todo 序列化器:
class TodoSerializer(serializers.ModelSerializer):
class Meta:
model = Todo
fields = ('id', 'todo_title', 'todo_body', 'completed', 'list',)
read_only_fields = ('id', 'list',)
还有一个 TodoByList 视图集:
class TodoByListViewSet(mixins.CreateModelMixin,
mixins.ListModelMixin,
viewsets.GenericViewSet):
serializer_class = TodoSerializer
permission_classes = (IsAuthenticated,)
def get_queryset(self):
return Todo.objects.filter(list_id=self.kwargs['todolist_pk'])
def create(self, request, todolist_pk=None):
todo_list = get_object_or_404(TodoList, pk=todolist_pk)
serializer = self.get_serializer(data=request.data)
serializer.is_valid(raise_exception=True)
self.perform_create(serializer)
headers = self.get_success_headers(serializer.data)
return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
列表视图效果很好,但是对于创建我有点赶上 22。我的 Todo 模型的 list 参数是必需的(这是正确的),因此由于未设置perform_create
而不起作用。list
但是,如果我list
从read_only_fields
序列化程序中删除,则会.is_valid
失败,因为我没有将列表 ID 与我的请求数据一起传递。我需要做的是注入todo_list
从 url 参数中检索到的实例,但我不确定如何做到这一点。