Django Rest Framework与序列化程序结合使用时发生AttributeError [英] AttributeError while using Django Rest Framework with serializers

问题描述

我正在遵循此处使用< a href = http://www.django-rest-framework.org/> Django Rest Framework ，我不断收到有关字段的奇怪错误。

I am following a tutorial located here that uses Django Rest Framework, and I keep getting a weird error about a field.

我的 models.py

from django.db import models

class Task(models.Model):
    completed = models.BooleanField(default=False)
    title = models.CharField(max_length=100)
    description = models.TextField()

然后在 serializers.py

from rest_framework import serializers

from task.models import Task

class TaskSerializer(serializers.ModelSerializer):

    class Meta:
        model = Task
        fields = ('title', 'description', 'completed')

和我的 views.py 如下所示：

from rest_framework import status
from rest_framework.decorators import api_view
from rest_framework.response import Response

from task.models import Task
from api.serializers import TaskSerializer


    @api_view(['GET', 'POST'])
    def task_list(request):
        """
        List all tasks, or create a new task
        """
        if request.method == 'GET':
            tasks = Task.objects.all()
            serializer = TaskSerializer(tasks)
            return Response(serializer.data)

        elif request.method == 'POST':
            serializer = TaskSerializer(data=request.DATA)
            if serializer.is_valid():
                serializer.save()
                return Response(serializer.data, status=status.HTTP_201_CREATED)
            else:
                return Response(
                    serializer.errors, status=status.HTTP_400_BAD_REQUEST
                )

并且我的urls.py有这行：

and my urls.py has this line:

url(r'^tasks/$', 'task_list', name='task_list'),

当我尝试访问 curl http：// localhost：9000 / api / tasks / ，我不断收到以下错误，我不确定该怎么做：

When I try accessing curl http://localhost:9000/api/tasks/, I keep getting the following error and I'm not sure what to make of it:

AttributeError at /api/tasks/
Got AttributeError when attempting to get a value for field `title` on serializer `TaskSerializer`.
The serializer field might be named incorrectly and not match any attribute or key on the `QuerySet` instance.
Original exception text was: 'QuerySet' object has no attribute 'title'.

我想念的是什么？

推荐答案

从查询集 TaskSerializer（tasks） many = True $ c>仅适用于 Task 的一个实例：

Simple specify many=True when creating a serializer from queryset, TaskSerializer(tasks) will work only with one instance of Task:

tasks = Task.objects.all()
serializer = TaskSerializer(tasks, many=True)

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