Django filter exclude foreign key

Question

I\'m creating a news website which has two models:

1. News
2. BestNews.

BestNews has a foreign key of News.

News stand

Answer 1

all_news = News.objects.all().order_by('-pk')

to

all_news = News.objects.filter(select_news__isnull=True).order_by('-pk')

---

free advice:

change

bestnews1 = Best.objects.filter(select_reason="左一")[0].select_news

to

bestnews1 = Best.objects.filter(select_reason="左一").first()
bestnews1_new = None if bestnew1 is None else bestnews1.select_news
return render(request, 'index.html', {
            'all_news': news,
             'bestnews1_new':bestnews1_new,
             'bestnews2_new':bestnews2_new,
        })