RestFramework的filter（搜索，过滤，排序）

1、django的filter（django_filters）

1. 安装

pip install django_filters

2. 配置

INSTALLED_APPS = [
    ...
    'django_filters',
    ...
]

3. 使用
   在app下新建一个filters.py文件

import django_filters
from django.db.models import Q

from .models import Goods


class GoodsFilter(django_filters.rest_framework.FilterSet):
    """
    商品的过滤类
    """
    pricemin = django_filters.NumberFilter(name='shop_price', help_text="最低价格",lookup_expr='gte')
    pricemax = django_filters.NumberFilter(name='shop_price', lookup_expr='lte')
    top_category = django_filters.NumberFilter(method='top_category_filter')


    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))


    class Meta:
        model = Goods
        fields = ['pricemin', 'pricemax', 'is_hot', 'is_new']

在view中的使用

class GoodsListViewSet(CacheResponseMixin, mixins.ListModelMixin, mixins.RetrieveModelMixin, viewsets.GenericViewSet):
    """
    商品列表页, 分页， 搜索， 过滤， 排序
    """
    # throttle_classes = (UserRateThrottle, )
    queryset = Goods.objects.all()
    serializer_class = GoodsSerializer
    pagination_class = GoodsPagination
    # authentication_classes = (TokenAuthentication, )
    filter_backends = (DjangoFilterBackend, filters.SearchFilter, filters.OrderingFilter)
    #使用filters.py中的类
    filter_class = GoodsFilter
    #这两个是drf的filter
    search_fields = ('name', 'goods_brief', 'goods_desc')
    ordering_fields = ('sold_num', 'shop_price')

    def retrieve(self, request, *args, **kwargs):
        instance = self.get_object()
        instance.click_num += 1
        instance.save()
        serializer = self.get_serializer(instance)
        return Response(serializer.data)

2、Restframework中的filter

1. SearchFilter
   搜索，配置搜索字段，可选择精确匹配或者模糊匹配（=）【具体看官方文档】
2. OrderingFilter
   排序，配置排序字段

直接导入进行配置使用

from rest_framework import filters
from django_filters.rest_framework import DjangoFilterBackend

class GoodsListViewSet(CacheResponseMixin, mixins.ListModelMixin, mixins.RetrieveModelMixin, viewsets.GenericViewSet):
    """
    商品列表页, 分页， 搜索， 过滤， 排序
    """
    # throttle_classes = (UserRateThrottle, )
    queryset = Goods.objects.all()
    serializer_class = GoodsSerializer
    pagination_class = GoodsPagination
    # authentication_classes = (TokenAuthentication, )
    filter_backends = (DjangoFilterBackend, filters.SearchFilter, filters.OrderingFilter)
    #使用filters.py中的类
    filter_class = GoodsFilter
    #这两个是drf的filter
    search_fields = ('name', 'goods_brief', 'goods_desc')
    ordering_fields = ('sold_num', 'shop_price')