Django—分页器组件

一 Django的分页器（paginator）简介

补充ORM批量插入ll = []
    for i in range(1, 101):
        ll.append(models.Book(name='图书%s' % i, price=20 + i))
    models.Book.objects.bulk_create(ll)

from django.core.paginator import Paginator

Paginator对象：    paginator = Paginator(user_list, 10)——两个参数（对象列表，每页显示的条数）
# paginator.per_page: 每页显示条目数量
# paginator.count:    数据总个数
# paginator.num_pages:总页数
# paginator.page_range:总页数的索引范围，页码数的列表，如: (1,10),(1,200)
# paginator.page(n): 取到第n页，返回一个page对象

# current_page=paginator.page(5)    
# current_page.has_next              是否有下一页
# current_page.next_page_number      下一页页码
# current_page.has_previous          是否有上一页
# current_page.previous_page_number  上一页页码
# current_page.object_list        当前页码内的所有数据
# number                当前页
# paginator             paginator对象

二代码实现

1、应用层views

from django.shortcuts import render, HttpResponse

# Create your views here.
from django.core.paginator import Paginator
from app01 import models


def index(request):
    #     ll = []
    #     for i in range(1, 101):
    #         ll.append(models.Book(name='图书%s' % i, price=20 + i))
    #     models.Book.objects.bulk_create(ll)
    book_list = models.Book.objects.all()
    paginator = Paginator(book_list, 3)
    # 如果页码数多,让它显示前5,后5,中间是当前在的页码
    try:

        current_page_num = int(request.GET.get('page'))
        current_page = paginator.page(current_page_num)
        print(current_page.object_list)
        # 总页码数,大于11的时候
        if paginator.num_pages >11:
            # 当前页码数-5大于1的时候,page_range应该是?
            if current_page_num-5<1:
                page_range=range(1,12)
            elif current_page_num+5>paginator.num_pages:
                #     当前页码数+5大于总页码数,总页码数往前推11个
                page_range=range(paginator.num_pages-10,paginator.num_pages+1)
            else:
                page_range = range(current_page_num - 5, current_page_num + 6)
        else:
            #小于11,有多少页,就显示多少页
            page_range=paginator.page_range
    except Exception as e:
        current_page_num = 1
        current_page = paginator.page(current_page_num)
        page_range = range(1, 12)

    return render(request, 'index_next.html', locals())

2、模版层 index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="/static/bootstrap-3.3.7-dist/css/bootstrap.css">
    <title>index</title>
</head>
<body>
<div class="container">
    <div class="row">
        <div class="col-md-6 col-md-offset-3">
            <table class="table table-striped">
                <thead>
                <tr>
                    <th>书名</th>
                    <th>价格</th>
                </tr>
                </thead>
                <tbody>
                {% for book in current_page %}
                    <tr>
                        <td>{{ book.name }}</td>
                        <td>{{ book.price }}</td>
                    </tr>
                {% endfor %}

                </tbody>
            </table>

            <nav aria-label="Page navigation">
                <ul class="pagination">
                    {% if current_page.has_previous %}
                        <li>
                            {#<a href="/index/?page={{ current_page_num|add:-1 }}" aria-label="Previous">#}
                            <a href="/index/?page={{ current_page.previous_page_number }}" aria-label="Previous">
                                <span aria-hidden="true">上一页</span>
                            </a>
                        </li>
                    {% else %}
                        <li class="disabled">
                            <a href="" aria-label="Previous">
                                <span aria-hidden="true">上一页</span>
                            </a>
                        </li>
                    {% endif %}
                    {% for foo in page_range %}
                        {% if current_page_num == foo %}
                            <li class="active"><a href="/index/?page={{ foo }}">{{ foo }}</a></li>
                        {% else %}
                            <li><a href="/index/?page={{ foo }}">{{ foo }}</a></li>
                        {% endif %}
                    {% endfor %}
                    {% if current_page.has_next %}
                        <li>
                            <a href="/index/?page={{ current_page.next_page_number }}" aria-label="Next">
                                <span aria-hidden="true">下一页</span>
                            </a>
                        </li>
                    {% else %}
                        <li class="disabled">
                            <a href="" aria-label="Next">
                                <span aria-hidden="true">下一页</span>
                            </a>
                        </li>
                    {% endif %}
                </ul>
            </nav>
        </div>

    </div>

</div>
</body>
</html>

来源：https://www.cnblogs.com/liweiwei0307/p/9991193.html

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Django—分页器组件

一 Django的分页器（paginator）简介

二 代码实现

1、应用层views

2、模版层 index.html

二代码实现