如何在django rest框架中的查询参数中创建OR运算符

时间:2015-01-23 04:33:01

标签: python django filtering django-rest-framework

如果我需要在django休息中进行过滤,那么我通常会这样做

class ProductFilter(django_filters.FilterSet):
    min_price = django_filters.NumberFilter(name="price", lookup_type='gte')
    max_price = django_filters.NumberFilter(name="price", lookup_type='lte')
    class Meta:
        model = Product
        fields = ['category', 'in_stock', 'min_price', 'max_price']

class ProductList(generics.ListAPIView):
    queryset = Product.objects.all()
    serializer_class = ProductSerializer
    filter_class = ProductFilter

我可以像

一样使用

http://example.com/api/products?category=clothing&max_price=10.00

但这会AND

我怎么能这样做或者从网址

其中(category = clothing || max_price = 10)

基本上我应该能够提供URL中的所有参数,如

http://example.com/api/products? AND=[{category: clothing}, {age: 10}], OR=[{age_gte:10}]

1 个答案:

答案 0 :(得分:2)

Okey,你需要在你的url中传入一些标志来检查你是否要执行混合查询。同时为params添加前缀,如果在AND运算符中应使用age=20,则添加前缀'and_',它看起来像and_age=20,依此类推。 OR params也是如此。

让我们有这个网址

http://example.com/api/products?and_category=clothing&and_max_price=10.00&or_age=20&mixed=true

现在,我们的观点。

class ProductList(generics.ListAPIView):
    queryset = Product.objects.all()
    serializer_class = ProductSerializer
    filter_class = ProductFilter

    def get_queryset(self):
        data = self.request.DATA
        mixed_query = data.get('mixed',None)

        if not mixed_query:
            return self.queryset
        and_params = {}
        for key in data:
           if 'and_' in key:
              and_params[key] = data[key]


        queryset = Products.objects.filter(**and_params)
        for key in self.request.DATA:
            if 'or_' in key:
              queryset = queryset | Products.objects.filter(key=data[key])

        return queryset