from django_filters.rest_framework import DjangoFilterBackend

from django_filters import rest_framework as filters

class BookView(ModelViewSet):

    queryset = Book.objects.all()

    serializer_class = BookSerializer

    filter_backends = (DjangoFilterBackend,)

    filter_fields = ('title', 'price')

class ProductFilter(filters.FilterSet):

    # 最小

    min_price = filters.NumberFilter(field_name="price", lookup_expr="gte")

    # 最大

    max_price = filters.NumberFilter(field_name="price", lookup_expr="lte")

    # 包含

    name = filters.CharFilter(field_name="title", lookup_expr="icontains")

    # 通过?字段自定义过滤

    class Meta:

        model = Book

        fields = ["min_price", "max_price", "name"]

class BookView(ModelViewSet):

    queryset = Book.objects.all()

    serializer_class = BookSerializer

    filter_backends = (DjangoFilterBackend,)

    # 自定义过滤类

    filter_class = ProductFilter

from rest_framework.pagination import LimitOffsetPagination

class P1(LimitOffsetPagination):

    max_limit =

    default_limit =

    # 从offset开始访问的下几个

    limit_query_param = "limit"

    # 定义从表中的offset开始计算

    offset_query_param = "offset"

class IndexView2(APIView):

    def get(self, request, *args, **kwargs):

        user_list = Book.objects.all()

        p1=P1()

        page_user_list = p1.paginate_queryset(queryset=user_list, request=request, view=self)

        print("打印的数据", page_user_list)

        ser = BookSerializer(instance=page_user_list, many=True)

        # return Response(ser.data)

        # 自带分页

        return p1.get_paginated_response(ser.data)

class BookView(ModelViewSet):

    queryset = Book.objects.all()

    serializer_class = BookSerializer

    filter_backends = (DjangoFilterBackend,)

    # 自定义过滤类

    filter_class = ProductFilter

    filter_fields = ('title', 'price')

    # pagination_class = MyPageNumberPagination

    # authentication_classes = [UserAuth]

    # permission_classes = [UserPerm]