Django的分页器（paginator）

时间：2021-11-24 09:24:20

先导入模块：

from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger

分页器paginator 下面的所有方法:

    book_list=Book.objects.all()    

    paginator = Paginator(book_list, 10)   #实例化出一个对象

    print("count:",paginator.count)           #数据总数

    print("num_pages",paginator.num_pages)    #总页数

    print("page_range",paginator.page_range)  #页码的列表

    page1=paginator.page(1) #第1页的page对象

    for i in page1:         #遍历第1页的所有数据对象

        print(i)

    print(page1.object_list) #第1页的所有数据

    page2=paginator.page(2)

    print(page2.has_next())            #是否有下一页

    print(page2.next_page_number())    #下一页的页码

    print(page2.has_previous())        #是否有上一页

    print(page2.previous_page_number()) #上一页的页码

    # 抛错

    #page=paginator.page(12)   # error:EmptyPage

    #page=paginator.page("z")   # error:PageNotAnInteger

    '''

分页器的使用（views函数中的代码）：

 book_list=Book.objects.all()

    paginator = Paginator(book_list, 10)

    page = request.GET.get('page',1)

    currentPage=int(page)

    try:

        print(page)

        book_list = paginator.page(page)

    except PageNotAnInteger:

        book_list = paginator.page(1)

    except EmptyPage:

        book_list = paginator.page(paginator.num_pages)

    return render(request,"index.html",{"book_list":book_list,"paginator":paginator,"currentPage":currentPage})

templates中的代码

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

    <link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css"

    integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">

</head>

<body>

<div class="container">

    <h4>分页器</h4>

    <ul>

        {% for book in book_list %}

             <li>{{ book.title }} -----{{ book.price }}</li>

        {% endfor %}

     </ul>

    <ul class="pagination" id="pager">

                 {% if book_list.has_previous %}

                    <li class="previous"><a href="/index/?page={{ book_list.previous_page_number }}">上一页</a></li>

                 {% else %}

                    <li class="previous disabled"><a href="#">上一页</a></li>

                 {% endif %}

                 {% for num in paginator.page_range %}

                     {% if num == currentPage %}

                       <li class="item active"><a href="/index/?page={{ num }}">{{ num }}</a></li>

                     {% else %}

                       <li class="item"><a href="/index/?page={{ num }}">{{ num }}</a></li>

                     {% endif %}

                 {% endfor %}

                 {% if book_list.has_next %}

                    <li class="next"><a href="/index/?page={{ book_list.next_page_number }}">下一页</a></li>

                 {% else %}

                    <li class="next disabled"><a href="#">下一页</a></li>

                 {% endif %}

            </ul>

</div>

</body>

</html>

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