4. api_view和root_api

@api_view(["GET","POST"])
def idcs_list_v2(request,format=None,*args,**kwargs):
    if request.method == "GET":
        queryset = Idc.objects.all()
        serializer = IdcSerializer(queryset,many=True)
        return Response(serializer.data)
    elif request.method=="POST":
        serializer = IdcSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data,status=status.HTTP_201_CREATED)
        return Response(serializer.data,status=status.HTTP_400_BAD_REQUEST)

from rest_framework.response import *
@api_view(["GET","PUT","DELETE"])
def idcs_detail_V2(request,pk,*args,**kwargs):
    try:
        idc = Idc.objects.get(pk=pk)
    except Idc.DoesNotExist:
        return HttpResponse(status=status.HTTP_404_NOT_FOUND)
    
    if request.method == "GET":
        serializer= IdcSerializer(idc)
        return Response(serializer.data) 
        # 这个response是DRF中的，不需要上面那个JsonResponse类了,并且还有对应操作界面
    
    elif request.method == "PUT":
        serializer = IdcSerializer(idc,data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data)
        return Response(serializer.errors,status=status.HTTP_404_NOT_FOUND)
    elif request.method=="DELETE":
        idc.delete()
        return Response(status=status.HTTP_204_NO_CONTENT)

from rest_framework.reverse import reverse    
@api_view(["GET"])
def api_root(request,format=None,*args,**kwargs):
    return Response(
        {
            // idcs-list 是urls中的name， 将name解析成当前对应的请求
            "idcs" : reverse("idcs-list",request=request,format=format)
        }
    )

路由层

### 版本二
from rest_framework.urlpatterns import format_suffix_patterns
urlpatterns = [
   url("^$",views.api_root),
   url("^idcs/$",views.idcs_list_v2,name="idcs-list"),
   url("^idcs/(?P<pk>[0-9]+)/$",views.idcs_detail_V2,name="idc_detail"),
]
urlpatterns = format_suffix_patterns(urlpatterns)

format_suffix_patterns 这个能实现效果：

效果如下

api root作用就是给个首页