HyperlinkedModelSerializer

最新推荐文章于 2025-05-27 17:28:12 发布

jiang_xiaoo24

最新推荐文章于 2025-05-27 17:28:12 发布

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这篇博客介绍了如何在序列化器中继承HyperlinkedModelSerializer，并添加url和highlighted字段。同时，它展示了在views中如何处理HyperlinkedRelatedField，以获取序列化器中的特定属性而非对象实例。

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一、序列化器，继承HyperlinkedModelSerializer，分别添加url以及highlighted字段，建立snippets = serializers.HyperlinkedRelatedField关系

class SnippetSerializer(serializers.HyperlinkedModelSerializer):
    owner = serializers.ReadOnlyField(source='owner.username')
    highlighted = serializers.HyperlinkedIdentityField(view_name='snippet-highlight', format='html')

    class Meta:
        model = Snippet
        fields = ('url', 'id', 'title', 'code', 'linenos', 'language', 'style', 'owner', 'highlighted')


class UserSerializer(serializers.HyperlinkedModelSerializer):
    snippets = serializers.HyperlinkedRelatedField(many=True, view_name='snippet-detail', read_only=True)

    class Meta:
        model = User
        fields = ('url', 'id', 'username', 'snippets')

二、views当中添加单独的SnippetHighlight,这里是获取一个序列化器中的属性，而不是获取序列化。默认带一个url.不是返回对象实例，而是返回对象实例的属性。

from snippets.models import Snippet
from snippets.serializers import SnippetSerializer,UserSerializer
from rest_framework import generics
from django.contrib.auth.models import User
from snippets.permissions import IsOwnerOrReadOnly
from rest_framework import permissions


class SnippetList(generics.ListCreateAPIView):
    queryset = Snippet.objects.all()
    serializer_class = SnippetSerializer

    def perform_create(self, serializer):
        serializer.save(owner=self.request.user)

    permission_classes = (permissions.IsAuthenticatedOrReadOnly,)


class SnippetDetail(generics.RetrieveUpdateDestroyAPIView):
    queryset = Snippet.objects.all()
    serializer_class = SnippetSerializer
    permission_classes = (permissions.IsAuthenticatedOrReadOnly,
                          IsOwnerOrReadOnly,)


class UserList(generics.ListAPIView):
    queryset = User.objects.all()
    serializer_class = UserSerializer


class UserDetail(generics.RetrieveAPIView):
    queryset = User.objects.all()
    serializer_class = UserSerializer

from rest_framework.decorators import api_view
from rest_framework.reverse import reverse
from rest_framework import renderers, generics
from rest_framework.response import Response

#这里提供一个统一入口
@api_view(['GET'])
def api_root(request, format=None):
    return Response(
        {
            'users': reverse('user-list', request=request, format=format),
            'snippets': reverse('snippet-list', request=request, format=format)
        }
    )


class SnippetHighlight(generics.GenericAPIView):
    queryset = Snippet.objects.all()
    renderer_classes = (renderers.StaticHTMLRenderer,)

    def get(self, request, *args, **kwargs):
        snippet = self.get_object()
        return Response(snippet.highlighted)