Django REST framwork 自带分页器，一种是在settings.py里配置，另外一种是在views.py

serializers.py

class GoodSerializer(serializers.Serializer):
    name = serializers.CharField(required=True,max_length=100)
    click_num = serializers.IntegerField(default=0)

    def create(self, validated_data):
        return Goods.objects.create(**validated_data)



class CategorySerializer(serializers.ModelSerializer):
    class Meta:
        model = GoodsCategory
        fields = '__all__'

# category 是Goods的外键，如果想把外键表的信息给展示出来，需要将外键表也给序列化，
#然后用外键这个字段来实例化外键表
class GoodsSerializer(serializers.ModelSerializer):
    category = CategorySerializer()
    class Meta:
        model = Goods
        # fields = ('name', 'click_num', 'market_price', 'add_time')
        fields = '__all__' #全部

views.py

from rest_framework.pagination import PageNumberPagination
from goods.serializer import GoodsSerializer
from users.models import Goods

# APIView
class GoodsListView(APIView):
    def get(self, request, format=None):
        goods = Goods.objects.all()[:10]
        goods_serializer = GoodsSerializer(goods, many=True)
        return Response(goods_serializer.data)
    def post(self,request):
        serializer = GoodSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data,status=status.HTTP_200_OK)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)


# 分页
class GoodsPagination(PageNumberPagination):
    page_size = 10
    page_size_query_param = 'page_size'
    page_query_param = 'p'
    max_page_size = 100


class GoodsListView(generics.ListAPIView):
    queryset = Goods.objects.all()
    serializer_class = GoodsSerializer
    pagination_class = GoodsPagination

过滤

https://github.com/philipn/django-rest-framework-filters#filterset-usage

filters.py

import django_filters
from django.db.models import Q

from users.models import Goods


class GoodsFilter(django_filters.rest_framework.FilterSet):
    '''
    商品的过滤类
    '''
    # 取出最大值和最小值
    price_min = django_filters.NumberFilter(name='shop_price', lookup_expr='gte')
    price_max = django_filters.NumberFilter(name='shop_price', lookup_expr='lte')
    top_category = django_filters.NumberFilter(method='top_category_filter')

    # 参数是迷人传递进来的，需要手动将参数写入
    # 查找第一类别的所有商品
    def top_category_filter(self, queryset, name, value):
        return queryset.filter(Q(category_id=value)|Q(category__parent_category_id=value)|Q(category__parent_category__parent_category_id=value))

    # 模糊查询,类似MySQL里的like
    name = django_filters.CharFilter(name='name', lookup_expr='icontains')

    class Meta:
        model = Goods
        fields = ['price_min', 'price_max', 'name']


   

views.py

分页、搜索、过滤、排序

rom django_filters.rest_framework import DjangoFilterBackend
from rest_framework import status, mixins, filters
from rest_framework.pagination import PageNumberPagination
from rest_framework.response import Response
from rest_framework.views import APIView
from rest_framework import generics
from rest_framework import viewsets



# class GoodsListViewSet(mixins.ListModelMixin,viewsets.GenericViewSet):
#     '''
#     商品列表
#     '''
#     serializer_class = GoodsSerializer
#     pagination_class = GoodsPagination
# 
#     # 过滤需要重写get_queryset
#     def get_queryset(self):
#         queryset = Goods.objects.all()
#         price_min = self.request.query_params.get('price_min',0)
#         if price_min:
#              queryset = queryset.filter(shop_price__gt=int(price_min))
#         return queryset

class GoodListViewSet(mixins.ListModelMixin,viewsets.GenericViewSet):
    '''
    商品列表页
    '''
    queryset = Goods.objects.all()
    serializer_class = GoodsSerializer
    pagination_class = GoodsPagination
   filter_backends = (DjangoFilterBackend,filters.SearchFilter,filters.OrderingFilter)
    filter_class = GoodsFilter
    
    # 前端请求的时候参数是?search= ...
    search_fields = ('=name', 'goods_brief', 'goods_desc')
    # 前端请求的时候参数是?order ing= ...
    ordering_fields = ('sold_num', 'add_time')