zoukankan html css js c++ java

crm--分页

1、给数据库添加数据

试图函数（book表，含有title和price列）

# 给数据库添加数据
def index(request):
    book_list = []
    for i in range(1, 101):
        book = Book.objects.create(title="book_%s" % i, price=i * 2)
        book_list.append(book)
    Book.objects.bulk_create(book_list)
    return HttpResponse("ok")

django分页的基本语法

    paginator = Paginator(book_list, 20)  # 对谁分页，每页分多少行数据
    print(paginator.count)   # 多少个分页对象
    print(paginator.num_pages)  #分了多少页
    print(paginator.page_range) # range(1,6) 分了5页，从1-5

    page = paginator.page(1)  # 第n页的数据
    print(page.object_list)   # 取一页的数据

    print(page.has_next())   # 上一页
    print(page.has_previous())  # 下一页
    print(page.next_page_number())  # 下一个的数字
    print(page.previous_page_number()) # 上一页的数值

views函数

    book_list = Book.objects.all()
    # print(book_list)

    paginator = Paginator(book_list, 10)
    try:
        current_page = int(request.GET.get("page", 1))  # 默认是1
        page = paginator.page(current_page)
    except EmptyPage as e:
        page = paginator.page(1)
    return render(request, "index.html", locals())

index页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
</head>
<body>
<h4>书籍列表</h4>
<ul>
    {% for book in page %}
        <li>{{ book }}</li>
    {% endfor %}
</ul>
<nav aria-label="Page navigation">
  <ul class="pagination">
    {% if page.has_previous %}
        <li>
          <a href="?page={{ 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 num in paginator.page_range %}
            {% if current_page == num %}
                <li class="active"><a href="?page={{ num }}">{{ num }}</a></li>
            {% else %}
                 <li><a href="?page={{ num }}">{{ num }}</a></li>
            {% endif %}
        {% endfor %}
  {% if page.has_next %}
        <li>
          <a href="?page={{ 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>
</body>
</html>

查看全文

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 3.2.8 sed 的运作
 3.2.7.1 替换细节
 3.2.7 基本用法
 3.2.6 在文本文件里进行替换
 3.2.5 程序与正则表达式
 pgm2
pgm6
pgm7
pgm8

原文地址：https://www.cnblogs.com/echo2019/p/10720014.html