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DRF过滤类

OrderingFilter排序

DRF自带的排序类OrderingFilter

必须是继承 GenericAPIView 的视图类才能调用，继承APIView时不能这么配置

# views.py
from rest_framework.filters import OrderingFilter

class publish(GenericViewSet, ListModelMixin):
    filter_backends = [OrderingFilter]

此时前端请求也要改变

根据id排序：

http://127.0.0.1:8000/publish/?ordering=id

根据id倒序排序：

http://127.0.0.1:8000/publish/?ordering=-id

如果重写了list方法则该方法不生效，只有用父类的list才会生效`

res = super().list(request, *args, **kwargs)

SearchFilter过滤

过滤类和排序类不冲突

# views.py
from rest_framework.filters import OrderingFilter, SearchFilter 

class publish(GenericViewSet, ListModelMixin):
    queryset = models.Publish.objects.all()
    serializer_class = PublishSerializer
    filter_backends = [OrderingFilter, SearchFilter]
    search_fields = ['name']

此时前端请求也要改

查找name中带’北’的数据：

http://127.0.0.1:8000/publish/?search=北

也可以多个字段模糊匹配

search_fields=['name','publish']

此时?search='北'会查找name和publish字段中都包含北的数据

第三方过滤`django-filter`

安装第三方模块：

pip3 install django-filter

class BookListView(GenericViewSet, ListModelMixin):
	# 第三方过滤类
    filter_backends = [DjangoFilterBackend]
    filterset_fields = ['price', 'name']
    	http://127.0.0.1:8008/publish/?price=66&name=红

自定义过滤类

from rest_framework.filters import BaseFilterBackend


class CommonFilter(BaseFilterBackend):
    def filter_queryset(self, request, queryset, view):
        # 完成过滤，返回 qs对象
        # http://127.0.0.1:8000/publish/?name=北
        name = request.query_params.get('name', None)
        if name:
            queryset = queryset.filter(name__contains=name)

        return queryset

使用

# views.py
from app.MyFilter import CommonFilter

class publish(GenericViewSet, ListModelMixin):
    queryset = models.Publish.objects.all()
    serializer_class = PublishSerializer
    # 使用自定义的类
    filter_backends = [CommonFilter]
    search_fields = ['name']