在django模板中对div进行排序

Question

我是 Django 的新手，请帮助解决我的问题。

class Article(models.Model):
articlecategory = models.ForeignKey(ArticleCategory)

文章类别可以按Big_news（连续1条新闻）或Small_news（连续3条新闻）

我想要模板中的逻辑：

1) 按日期对所有文章排序
2)if last 3 news = Small_news => 创建排 3 div
3) 如果在最后 3 条新闻中我们有 Big_news => 创建行 with Big_news-> 然后用小新闻创建行（如果 big_news 之后的所有 3 个新闻都是 small_news）

如何在 Django 中获取这个（第 3 段）？

Answer 1

您应该在您的视图中处理此逻辑。它不属于您的模板。

class ArticleRowViewModel:
    def __init__(self, articles):
        self.articles = articles

    def is_big_news(self):
        return len(self.articles) == 1

articles = Article.objects.all().order_by('-date')
previous_articles = []
view_models = []
for article in articles:
    if article.big_news:
        # TODO: I don't know if this is right.
        # Your business logic didn't cover it. I'm treating it if there
        # any small news articles, that they should appear as such before
        # the current big `article` in the loop.
        if previous_articles:
            view_models.append(ArticleRowViewModel(previous_articles))
            previous_articles = []
        view_models.append(ArticleRowViewModel([article]))
    else:
        previous_articles.append(article)
        # Check if we have 3 small articles.
        if len(previous_articles) == 3:
            view_models.append(ArticleRowViewModel(previous_articles))
            previous_articles = []  
render_or_something(view_models)

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