rest_framework数据增删改查操作

版本一

from django.shortcuts import render
from rest_framework.views import APIView
from rest_framework.response import Response
from .models import Student
from .serializers import StudentSerializer
from rest_framework.viewsets import ViewSetMixin, ModelViewSet

# Create your views here.

class GenericAPIView(APIView):
    queryset = None
    serializer_class = None

    def get_queryset(self):
        return self.queryset.all()

    def get_serializer(self, *args, **kwargs):
        return self.serializer_class(*args, **kwargs)


class ListModelMixin(object):
    def list(self, request):
        queryset = self.get_queryset()
        ser_obj = self.get_serializer(queryset, many=True)
        return Response(ser_obj.data)


class CreateModelMixin(object):
    def create(self, request):
        ser_obj = self.get_serializer(data=request.data)
        if ser_obj.is_valid():
            print(ser_obj.validated_data)
            ser_obj.save()
            return Response(ser_obj.validated_data)
        else:
            return Response(ser_obj.errors)


class All(GenericAPIView, ListModelMixin, CreateModelMixin):
    pass


class RetrieveModelMixin(object):
    def retrieve(self, request, id):
        student_obj = self.get_queryset().filter(id=id).first()
        ser_obj = self.get_serializer(student_obj)
        return Response(ser_obj.data)


class UpdateModelMixin(object):
    def update(self, request, id):
        student_obj = self.get_queryset().filter(id=id).first()
        ser_obj = self.get_serializer(instance=student_obj, data=request.data, partial=True)
        if ser_obj.is_valid():
            ser_obj.save()
            return Response(ser_obj.validated_data)
        else:
            return Response(ser_obj.errors)


class DestroyModelMixin(object):
    def destroy(self, request, id):
        student_obj = self.get_queryset().filter(id=id).first()
        if student_obj:
            student_obj.delete()
            return Response("")
        else:
            return Response("删除对象不存在")


class EditAll(GenericAPIView, RetrieveModelMixin, UpdateModelMixin, DestroyModelMixin):
    pass


class StudentAPIView(All):
    queryset = Student.objects.all()
    serializer_class = StudentSerializer

    def get(self, request):
        return self.list(request)

    def post(self, request):
        return self.create(request)


class StudentEditView(EditAll):
    queryset = Student.objects.all()
    serializer_class = StudentSerializer

    def get(self, request, id):  # 不知道为什么这里的形参id的名字必须与url(?P<id>\d+)中传递参数的名字一样,可能这里传的是关键字参数吧
        return self.retrieve(request, id)

    def patch(self, request, id):
        return self.update(request, id)

    def delete(self, request, id):
        return self.destroy(request, id)


# class ModelViewSet(ViewSetMixin, All, EditAll):  # 打开注释用的是自己写的ModelViewSet,不打开用的是rest_framework封装好的ModelViewSet
#     pass


class BooksAPIView(ModelViewSet):
    queryset = Student.objects.all()
    serializer_class = StudentSerializer

　　自己写的,还是觉得自己写的比较好用

from rest_framework.views import APIView
from rest_framework.response import Response
from .models import Student
from .serializers import StudentSerializer

class GenericAPIView(APIView):
    queryset = None
    serializer_class = None
    def get_queryset(self):
        return self.queryset.all()
    def get_serializer(self, *args, **kwargs):
        return self.serializer_class(*args, **kwargs)
    def retrieve(self, request, id):
        if not id:
            queryset = self.get_queryset()
            ser_obj = self.get_serializer(queryset, many=True)
        else:
            student_obj = self.get_queryset().filter(id=id).first()
            ser_obj = self.get_serializer(student_obj)

        return Response(ser_obj.data)
    def create(self, request):
        ser_obj = self.get_serializer(data=request.data)
        if ser_obj.is_valid():
            print(ser_obj.validated_data)
            ser_obj.save()
            return Response(ser_obj.validated_data)
        else:
            return Response(ser_obj.errors)
    def update(self, request, id):
        student_obj = self.get_queryset().filter(id=id).first()
        ser_obj = self.get_serializer(instance=student_obj, data=request.data, partial=True)
        if ser_obj.is_valid():
            ser_obj.save()
            return Response(ser_obj.validated_data)
        else:
            return Response(ser_obj.errors)
    def destroy(self, request, id):
        student_obj = self.get_queryset().filter(id=id).first()
        if student_obj:
            student_obj.delete()
            return Response("")
        else:
            return Response("删除对象不存在")


class StudentView(GenericAPIView):
    queryset = Student.objects.all()
    serializer_class = StudentSerializer

    def get(self, request, id=None):
        return self.retrieve(request, id)

    def post(self, request,id=None):
        return self.create(request)

    def patch(self, request, id=None):
        return self.update(request, id)

    def delete(self, request, id=None):
        return self.destroy(request, id)　　

 

serializers.py 这是通用的

from rest_framework import serializers
from .models import Student


class ClassesSerializer(serializers.Serializer):
    id = serializers.IntegerField()
    name = serializers.CharField(max_length=32)


class CourseSerializer(serializers.Serializer):
    id = serializers.IntegerField()
    name = serializers.CharField(max_length=32)


class StudentSerializer(serializers.ModelSerializer):
    classes_info = serializers.SerializerMethodField(read_only=True)
    course_info = serializers.SerializerMethodField(read_only=True)

    def get_classes_info(self, obj):
        ret = {
            "id": obj.classes.id,
            "name": obj.classes.name
        }
        return ret

    def get_course_info(self, obj):
        courses = obj.courses.all()
        ret = []
        for course in courses:
            ret.append({
                "id": course.id,
                'name': course.name
            })
        return ret

    class Meta:
        model = Student
        fields = "__all__"
        # fields = ["id", "name", "classes_info","course_info"]
        extra_kwargs = {
            "classes": {"write_only": True},
            "courses": {'write_only': True},
        }

　　

urls.py

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    # url(r'^api/students', StudentAPIView.as_view()),   # get post请求
    # url(r'^api/student/(?P<id>\d+)', StudentEditView.as_view()), #带有id的get patch delete请求

    # 使用我们自己写的ModelViewSet,继承ViewSetMixin进行请求的分发
    # url(r'^api/students', BooksAPIView.as_view({"get": "list", "post": "create"})),
    # url(r'^api/student/(?P<id>\d+)', BooksAPIView.as_view({"get": "retrieve", "patch": "update", "delete": "destroy"})),

    # 使用rest_framework自带的ModelViewSet进行请求的分发,这里要注意url携带的命名参数,名字应该是pk
    # url(r'^api/students', BooksAPIView.as_view({"get": "list", "post": "create"})),
    # url(r'^api/student/(?P<pk>\d+)', BooksAPIView.as_view({"get": "retrieve", "patch": "update", "delete": "destroy"})),

    #自己写的测试版
    url(r'^api/student$', StudentView.as_view()),
    url(r'^api/student/(?P<id>\d+)', StudentView.as_view()),
]