# views.py
from rest_framework.views import APIView
from app01.models import Book
from app01.ser import BookSerializer
# 基于APIView写的
class BookView(APIView):
    def get(self,request):
        book_list=Book.objects.all()
        book_ser=BookSerializer(book_list,many=True)

        return Response(book_ser.data)
    def post(self,request):
        book_ser = BookSerializer(data=request.data)
        if book_ser.is_valid():
            book_ser.save()
            return Response(book_ser.data)
        else:
            return Response({‘status‘:101,‘msg‘:‘校验失败‘})


class BookDetailView(APIView):
    def get(self, request,pk):
        book = Book.objects.all().filter(pk=pk).first()
        book_ser = BookSerializer(book)
        return Response(book_ser.data)

    def put(self, request,pk):
        book = Book.objects.all().filter(pk=pk).first()
        book_ser = BookSerializer(instance=book,data=request.data)
        if book_ser.is_valid():
            book_ser.save()
            return Response(book_ser.data)
        else:
            return Response({‘status‘: 101, ‘msg‘: ‘校验失败‘})

    def delete(self,request,pk):
        ret=Book.objects.filter(pk=pk).delete()
        return Response({‘status‘: 100, ‘msg‘: ‘删除成功‘})
    
#models.py
class Book(models.Model):
    name=models.CharField(max_length=32)
    price=models.DecimalField(max_digits=5,decimal_places=2)
    publish=models.CharField(max_length=32)

#ser.py
class BookSerializer(serializers.ModelSerializer):
    class Meta:
        model=Book
        fields=‘__all__‘

# urls.py
path(‘books/‘, views.BookView.as_view()),
re_path(‘books/(?P<pk>\d+)‘, views.BookDetailView.as_view()),

# views.py
class Book2View(GenericAPIView):
    #queryset要传queryset对象，查询了所有的图书
    # serializer_class使用哪个序列化类来序列化这堆数据
    queryset=Book.objects
    # queryset=Book.objects.all()
    serializer_class = BookSerializer
    def get(self,request):
        book_list=self.get_queryset()
        book_ser=self.get_serializer(book_list,many=True)

        return Response(book_ser.data)
    def post(self,request):
        book_ser = self.get_serializer(data=request.data)
        if book_ser.is_valid():
            book_ser.save()
            return Response(book_ser.data)
        else:
            return Response({‘status‘:101,‘msg‘:‘校验失败‘})


class Book2DetailView(GenericAPIView):
    queryset = Book.objects
    serializer_class = BookSerializer
    def get(self, request,pk):
        book = self.get_object()
        book_ser = self.get_serializer(book)
        return Response(book_ser.data)

    def put(self, request,pk):
        book = self.get_object()
        book_ser = self.get_serializer(instance=book,data=request.data)
        if book_ser.is_valid():
            book_ser.save()
            return Response(book_ser.data)
        else:
            return Response({‘status‘: 101, ‘msg‘: ‘校验失败‘})

    def delete(self,request,pk):
        ret=self.get_object().delete()
        return Response({‘status‘: 100, ‘msg‘: ‘删除成功‘})
    
 #url.py
    # 使用GenericAPIView重写的
    path(‘books2/‘, views.Book2View.as_view()),
    re_path(‘books2/(?P<pk>\d+)‘, views.Book2DetailView.as_view()),

from rest_framework.mixins import  ListModelMixin,CreateModelMixin,UpdateModelMixin,DestroyModelMixin,RetrieveModelMixin
# views.py
class Book3View(GenericAPIView,ListModelMixin,CreateModelMixin):

    queryset=Book.objects
    serializer_class = BookSerializer
    def get(self,request):
        return self.list(request)

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

class Book3DetailView(GenericAPIView,RetrieveModelMixin,DestroyModelMixin,UpdateModelMixin):
    queryset = Book.objects
    serializer_class = BookSerializer
    def get(self, request,pk):
        return self.retrieve(request,pk)

    def put(self, request,pk):
        return self.update(request,pk)

    def delete(self,request,pk):
        return self.destroy(request,pk)
# urls.py
    # 使用GenericAPIView+5 个视图扩展类  重写的
    path(‘books3/‘, views.Book3View.as_view()),
    re_path(‘books3/(?P<pk>\d+)‘, views.Book3DetailView.as_view()),