Python - Django - 简单分页的实现

models.py：

from django.db import models

class Book(models.Model):

    title = models.CharField(max_length=32)

    def __str__(self):

        return self.title

    class Meta:

        db_table = "books"

批量创建 106 条数据

import os

if __name__ == '__main__':

    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mysite3.settings")

    import django

    django.setup()

    from app01 import models

    # 106 个书籍对象

    objs = [models.Book(title="《Python 的故事第{}版》".format(i)) for i in range(116)]

    # 在数据库中批量创建, 10 次一提交

    models.Book.objects.bulk_create(objs, 10)

views.py：

from django.shortcuts import render

from app01 import models

def book_list(request):

    # 从 URL 中取参数

    page_num = request.GET.get("page")

    print(page_num, type(page_num))

    page_num = int(page_num)

    # 定义两个变量保存数据从哪儿取到哪儿

    data_start = (page_num-1)*10

    data_end = page_num*10

    # 书籍总数

    total_count = models.Book.objects.all().count()

    # 每一页显示多少条数据

    per_page = 10

    # 总共需要多少页码来显示

    total_page, m = divmod(total_count, per_page)

    if m:

        total_page += 1

    all_book = models.Book.objects.all()[data_start:data_end]

    # 拼接 html 的分页代码

    html_list = []

    for i in range(1, total_page+1):

        tmp = '<li><a href="/book_list/?page={0}">{0}</a></li>'.format(i)

        html_list.append(tmp)

    page_html = "".join(html_list)

    return render(request, "book_list.html", {"books": all_book, "page_html": page_html})

book_list.html：

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>书籍列表</title>

    <link rel="stylesheet" href="/static/bootstrap/css/bootstrap.min.css">

</head>

<body>

<div class="container">

    <table class="table table-bordered">

        <thead>

        <tr>

            <th>序号</th>

            <th>id</th>

            <th>书名</th>

        </tr>

        </thead>

        <tbody>

        {% for book in books %}

            <tr>

                <td>{{ forloop.counter }}</td>

                <td>{{ book.id }}</td>

                <td>{{ book.title }}</td>

            </tr>

        {% endfor %}

        </tbody>

    </table>

    <nav aria-label="Page navigation">

        <ul class="pagination">

            {{ page_html|safe }}

        </ul>

    </nav>

</div>

</body>

</html>

运行结果：

巴特西

Python - Django - 简单分页的实现

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