course的views.py

from django.http.response import HttpResponse
from rest_framework.decorators import api_view
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status
from .models import Course
from .serializers import CourseSerializer
"""一、函数式编程"""
@api_view(["GET","POST"])
def course_list(request):
    """
    获取所有课程信息或新增一个课程
    """
    if request.method == "GET":
        s = CourseSerializer(instance=Course.objects.all(),many=True)
        return Response(data=s.data, status=status.HTTP_200_OK)
    elif request.method == "POST":
        s = CourseSerializer(data=request.data, partial=True)
        if s.is_valid():
            s.save(teacher=request.user)
            return Response(data=s.data, status=status.HTTP_201_CREATED)
        return Response(s.errors, status=status.HTTP_400_BAD_REQUEST)
@api_view(["GET","PUT","DELETE"])
def course_detail(request,pk):
    """
    获取、删除更新一个课程
    """
    try:
        course = Course.objects.get(pk=pk)
    except Course.DoesNotExist:
        return Response(data={"msg": "没有此课程信息"},status=status.HTTP_404_NOT_FOUND)
    else:
        if request.method == "GET":
            s = CourseSerializer(instance=course)
            return Response(data=s.data, status=status.HTTP_200_OK)
        elif request.method == "PUT":
            # 这里的instance的只是查出来的course，而data则是request传来的值
            s = CourseSerializer(instance=course, data=request.data)
            if s.is_valid():
                s.save()
                return Response(s.data,status=status.HTTP_200_OK)
        elif request.method == "DELETE":
            course.delete()
            return Response(status=status.HTTP_204_NO_CONTENT)
"""类试图 Class Based Views"""
class CourseList(APIView):
    def get(self, request):
        queryset = Course.objects.all()
        s = CourseSerializer(instance=queryset, many=True) # instance = xxx 是查询集
        return Response(s.data, status=status.HTTP_200_OK)
    def  post(self,request):
        s = CourseSerializer(data=request.data) # data是传递过来的数据，return前要先调用is_valid()方法验证数据
        if s.is_valid():
            s.save(teacher=self.request.user)
            return Response(data=s.data, status=status.HTTP_201_CREATED)
        return Response(s.errors, status.HTTP_400_BAD_REQUEST)
class CourseDetail(APIView):
    @staticmethod
    def get_object(pk):
        try:
            return Course.objects.get(pk=pk)
        except Course.DoesNotExist:
            # 返回none
            return
    def get(self,request,pk):
        obj = self.get_object(pk)
        if not obj:
            return Response(data={"msg": "没有此课程信息"}, status=status.HTTP_404_NOT_FOUND)
        s = CourseSerializer(instance=obj)
        return Response(s.data, status=status.HTTP_200_OK)
    def put(self,request,pk):
        obj = self.get_object(pk)
        if not obj:
            return Response(data={"msg": "没有此课程信息"}, status=status.HTTP_404_NOT_FOUND)
        s = CourseSerializer(instance=obj, data=request.data)
        if s.is_valid():
            s.save()
            return Response(data=s.data, status=status.HTTP_201_CREATED)
        return Response(data=s.data,status=status.HTTP_400_BAD_REQUEST)
    def delete(self,request,pk):
        obj = self.get_object(pk)
        if not obj:
            return Response(data={"msg": "没有此课程信息"}, status=status.HTTP_404_NOT_FOUND)
        obj.delete()
        return Response(status=status.HTTP_204_NO_CONTENT)

添加 course下的路由：

from django.urls import path, include

from course import views

urlpatterns = [
    # Function Based View
    path("fbv/list/", views.course_list, name="fbv-list"),
    path("fbv/detail/<int:pk>/", views.course_detail, name="fbv-detail"),
   
    # Class Based View
    path("cbv/list/", views.CourseList.as_view(), name="cbv-list"),
    path("cbv/detail/<int:pk>/", views.CourseDetail.as_view(), name="cbv-detail")
]

工程下的urls.py

from django.contrib import admin
from django.urls import path, include
urlpatterns = [
    path('api-auth/', include('rest_framework.urls')), # DRF的登录退出
    path('admin/', admin.site.urls),
    path('course/', include('course.urls'))
]