Django restful 框架 "The serializer field might be named incorrectly"

Question

你好亲爱的堆栈溢出者，我用 restful 框架建立了一个 Django 项目，我使用 JSON 响应以结构化的方式从服务器检索数据。

models.py

class Container(models.Model):     
    created = models.DateTimeField(auto_now_add=True)     
    title = models.CharField(max_length=100, blank=False, default='content')     
    content = models.TextField()      

        class Meta:         
            ordering = ['created']

有问题的代码：

views.py

class ContentView(RetrieveAPIView):
    queryset = Container.objects.all()
    serializer_class = ContainerSerializer
    def get_object(self):
        queryset = self.get_queryset()
        serializer = ContainerSerializer(queryset,many=True)
        return JsonResponse(serializer.data , safe=False)

执行时出现如下错误：

AttributeError: Got AttributeError when attempting to get a value for field `title` on serializer `ContainerSerializer`.
The serializer field might be named incorrectly and not match any attribute or key on the `JsonResponse` instance.
Original exception text was: 'JsonResponse' object has no attribute 'title'.
[21/May/2021 17:27:13] "GET /content/ HTTP/1.1" 500 18789

为了尽可能清楚，我将附上序列化程序的代码：

serializers.py

class ContainerSerializer(serializers.Serializer):
    id = serializers.IntegerField(read_only=True)
    title = serializers.CharField(required=True, allow_blank=False, max_length=100)
    content = serializers.CharField()

    def create(self, validated_data):
        return Container.objects.create(**validated_data)

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

在切换到 RetrieveAPIView 之前，一切都在测试服务器上运行良好。切换到这种新的请求方法时出现错误。

任何帮助将不胜感激！

Answer 1

让我们像这样尝试模型序列化程序：记住，您需要更新 serializers.py、views.py 和 urls.py 文件才能使其正常工作：

serialiers.py

from rest_framework import serializers
from . import models

class ContainerSerializer(serializers.ModelSerializer):

    class Meta:
        model = models.Container
        fields = ['id', 'created', 'title', 'content']

views.py

from rest_framework import viewsets
from . import serializers
from . import models

class ContainerViewSet(viewsets.ModelViewSet):

    serializer_class = serializers.ContainerSerializer
    queryset = models.Container.objects.order_by('id')

urls.py

from django.urls import include, path
from rest_framework import routers
from . import views

# rest:
router = routers.DefaultRouter()
router.register('containers', views.ContainerViewSet)

urlpatterns = [
    ...
    path('api/', include(router.urls))
]

现在我们可以完全访问 rest，所以我们可以执行 get、put、post、patch 和 delete 请求等. 对 url <base-url>/api/containers 的 get 请求应该 return 类似于：

[
  {
    'id' : 1,
    'created' : 'YYYY-MM-DD',
    'title' : 'title-1',
    'content' : 'content-1'
  },
  {
    'id' : 2,
    'created' : 'YYYY-MM-DD',
    'title' : 'title-2',
    'content' : 'content-2'
  }
]

Django restful 框架 "The serializer field might be named incorrectly"

Django restful framework "The serializer field might be named incorrectly"

python

django

serialization

django-rest-framework

jsonresponse