Rest_Framework--Hyperlinked

超链接API：Hyperlinked

它指的是当你返回的结果中有一对多或多对多时,这时候,服务器会返回一条url,你点击这个url就会直接看到具体的信息,

比如对于单个book对象来说,他返回的hyperlinked,点进去就会看到publish的id,title,email等信息

urls.py：

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^books/$', BookView.as_view()),
    url(r'^publishes/$', PublishView.as_view()),
    url(r'^books/(?P<pk>\d+)/$',BookdetailView.as_view(),name="books"),
    url(r'^publishes/(?P<pk>\d+)/$',PublishdetailView.as_view(),name="publishes")
]

serializers_base.py：

from rest_framework import serializers
from api_demo.models import *

class Bookserializers(serializers.ModelSerializer):  # 导入ModelSerializer这个类
    publish = serializers.HyperlinkedIdentityField(
        view_name='publishes',  # publish具体对象对应的url别名
        lookup_field="publish_id",  # 该字段在表book中的字段名
        lookup_url_kwarg="pk")  # publish具体对象对应的url中参数的名字

    class Meta:
        model = Book
        fields = "__all__"  # 对多对字段默认是主键值
        depth = 1

注意

这里你也要设计url.和序列化publish,否则超链接不会成功,代码因为重复我没有写

出现问题:

`HyperlinkedIdentityField` requires the request in the serializer context.Add `context={'request': request}` when instantiating the serializer.

这里要求我们在所有调用Bookserializers类进行序列化对象时都要添加上`context={'request': request},否则就会报上边的错误

class BookView(APIView):
    def get(self,request,*args,**kwargs):
        booklist=Book.objects.all()
        temp=Bookserializers(booklist,many=True,context = {'request': request})# 序列化操作,如果传入的是多个值,many=True,默认False
        return Response(temp.data) #发送其中的data就可以

    def post(self,request,*args,**kwargs):
        """
        添加函数
        :param request:
        :param args:
        :param kwargs:
        :return:
        """
        data=request.data #postman发过来的json,后端要用request.data来接收

        bs=Bookserializers(data=data,context = {'request': request}) #这里包括了反序列化,生成对象,但是没有保存到数据库中
        if bs.is_valid():#校验数据
            bs.save()
            return Response(bs.data)
        else:
            return Response(bs.errors)

#对book表中的单个数据进行查看,删除,编辑

class BookdetailView(APIView):
    def get(self,request,book_id,*args,**kwargs):
        """
        对单个对象查
        :param request:
        :param book_id:
        :param args:
        :param kwargs:
        :return:
        """
        book_obj=Book.objects.filter(pk=book_id).first()
        temp=Bookserializers(book_obj,context = {'request': request})
        return Response(temp.data)
    def put(self,request,book_id,*args,**kwargs):
        """
        对单个对象编辑
        :param request:
        :param book_id:
        :param args:
        :param kwargs:
        :return:
        """
        book_obj=Book.objects.filter(pk=book_id).first()
        temp=Bookserializers(data=request.data,instance=book_obj,context = {'request': request})
        if temp.is_valid():
            temp.save()
            return Response(temp.data)
        else:
            return Response(temp.errors)