I'm creating a news website which has two models:
BestNews has a foreign key of News .
News stands for all the news and BestNews is stands for the recommended news.
Now I have rendered News list and Best News list in index.html.But some news in these two parts are duplicated.
I hope news that in Best News list, will not appear in News list, and once I have removed the news from the Best News in admin, the news which has been removed from best news will appear News list.
Here is my News model:
class News(models.Model):
title = models.CharField(max_length=100, verbose_name='标题')
content = UEditorField(verbose_name="内容", width=600, height=300, imagePath="news/ueditor/", filePath="news/ueditor/", default='')
class Meta:
verbose_name = "新闻"
verbose_name_plural = verbose_name
def __str__(self):
return self.title
Here is my Best News model:
class Best(models.Model):
select_news = models.ForeignKey(News, on_delete=models.CASCADE, related_name='select_news',verbose_name='要闻')
SELECT_REASON = (
('左一', '左一'),
('左二', '左二'),
)
select_reason = models.CharField(choices=SELECT_REASON, max_length=50, null=False)
class Meta:
verbose_name = "精选"
verbose_name_plural = verbose_name
def __str__(self):
return self.select_reason + '-' + self.select_news.title
Here is my News list view:I get News list and Best News list in one view.
class NewsView(View):
def get(self, request):
all_news = News.objects.all().order_by('-pk')
bestnews1 = Best.objects.filter(select_reason="左一")[0].select_news
bestnews2 = Best.objects.filter(select_reason="左二")[0].select_news
return render(request, 'index.html', {
'all_news': news,
'bestnews1':bestnews1,
'bestnews2':bestnews1,
})
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,
})
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