Django 分页和“当前页面" [英] Django pagination and "current page"

问题描述

我目前正在开发一个 Django 应用程序，它将使用臭名昭著的分页"技术.我想弄清楚 django.core.paginator 模块是如何工作的.

I'm currently developing a Django application which will make use of the infamous "pagination" technique. I'm trying to figure out how the django.core.paginator module works.

我有一个带有问题模型的应用程序.我将使用这个分页器列出所有问题.每页将有 20 个问题.

I have an application with a Question model. I will be listing all of the questions using this paginator. There will be 20 questions per page.

def show_question(question_pk):
    questions = Question.objects.all()
    paginator = Paginator(questions, 20)
    page      = ... # Somehow figure out which page the question is on
    return render_to_response('show_question.html', { 'page' : page })

在视图中，我将不同的页面列为... 2, 3, 4, 5, 6, ..." 我想以某种方式突出显示当前页面，就像许多网页做.

In the view, where I list the different pages as "... 2, 3, 4, 5, 6, ..." I want to highlight the current page somehow, like many pages do.

我真的想知道两件事:

1. 如何让 Django 找出问题所在的页面?
2. 如何编写模板以正确突出显示"当前访问的页面?

对不起，我忘记了这个问题的一部分.我还希望除当前页面之外的任何页面成为 /questions/{{ that_page.start_index }} 的链接.所以基本上每个页面链接都会链接到该页面上的第一个问题.

Sorry, I forgot part of this question. I would also like any page except for the current one to be a link to /questions/{{ that_page.start_index }}. So basically every page link would link to the first question on that page.

推荐答案

嗯...我从你的评论中看到你不想做 ol' GET 参数，这就是 django.core.paginator 写的用于使用.为了做你想做的事，我想不出比预先计算每个问题所在的页面更好的方法.例如，您的视图最终将类似于:

Hmm... I see from your comment that you don't want to do the ol' GET parameter, which is what django.core.paginator was written for using. To do what you want, I can think of no better way than to precompute the page that each question is on. As an example, your view will end up being something like:

ITEMS_PER_PAGE = 20
def show_question(question_pk):
    questions = Question.objects.all()
    for index, question in enumerate(questions):
        question.page = ((index - 1) / ITEMS_PER_PAGE) + 1
    paginator = Paginator(questions, ITEMS_PER_PAGE)
    page = paginator.page(questions.get(pk=question_pk).page)
    return render_to_response('show_question.html', { 'page' : page })

要突出显示模板中的当前页面，您可以执行类似的操作

To highlight the current page in the template, you'd do something like

{% for i in page.paginator.page_range %}
    {% ifequal i page.number %}
        <!-- Do something special for this page -->
    {% else %}
        <!-- All the other pages -->
    {% endifequal %}
{% endfor %}

至于项目，您将有两个不同的 object_list 可以使用...

As for the items, you'll have two different object_lists to work with...

page.object_list

将是当前页面中的对象和

will be the objects in the current page and

page.paginator.object_list

将是所有对象，无论页面如何.这些项目中的每一个都有一个页面"变量，可以告诉您它们在哪个页面上.

will be all objects, regardless of page. Each of those items will have a "page" variable that will tell you which page they're on.

总之，您所做的事情听起来非常规.你可能想重新考虑，但无论如何，祝你好运.

That all said, what you're doing sounds unconventional. You may want to rethink, but either way, good luck.

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