Question

我有以下代码

def get_context_data(self, **kwargs):
    context = super().get_context_data(**kwargs)
    prefetch = ['vendor', 'picture']
    context['most_popular_products'] = Product.objects.filter(is_popular=True)[:5].prefetch_related(*prefetch)
    context['coming_soon_products'] = Product.objects.filter(is_coming_soon=True)[:5].prefetch_related(*prefetch)
    context['recent_products'] = Product.objects.all()[:5].prefetch_related(*prefetch)
    return context

如您所见，有5个最新most_popular，coming_soon和recent个产品分别有3个电话。有没有办法减少数据库调用次数？

我想构建单个查询，如

popular, coming_soon, recent = Product.objects.filter...and.so.on

有什么想法吗？感谢

Answer 1

我不这么认为..但你可以使用一个查询集并从中过滤。

即。

products = Product.objects.all()
recent_products = products[:5]
coming_soon_products = products.filter(is_coming_soon=True)
most_popular_products = porducts.filter(is_popular=True)

Django：将3个单独的'filters（）'组合成单个查询

1 个答案: