分页器paginator

准备工作

分页器使用前，先导入，顺便导入页面为空和页码不是整数异常

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

简单示范

以之前book表为例

    book_list=Book.objects.all()

    paginator = Paginator(book_list, 10)

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

完善版

模板

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>Title</title>
 6     <link rel="stylesheet" href="\static\bootstrap-3.3.7-dist\css\bootstrap.css">
 7 </head>
 8 <body>
 9 <div class="container">
10     <div class="row">
11         <div class="col-md-6 col-md-offset-3">
12             <table class="table table-striped table-bordered">
13                 <thead>
14                 <th>书名</th>
15                 <th>价格</th>
16                 </thead>
17                 <tbody>
18                 {% for book in current_page %}
19                     <tr>
20                         <td>{{ book.title }}</td>
21                         <td>{{ book.price }}</td>
22                     </tr>
23                 {% endfor %}
24                 </tbody>
25             </table>
26             <nav aria-label="Page navigation">
27                 <ul class="pagination">
28                     {% if current_page.has_previous %}
29                         <li>
30                             <a href="?page={{ current_page.previous_page_number }}" aria-label="Previous">
31                                 <span aria-hidden="true">&laquo;</span>
32                             </a>
33                         </li>
34                     {% else %}
35                         <li class="disabled">
36                             <a href="#" aria-label="Previous">
37                                 <span aria-hidden="true">&laquo;</span>
38                             </a>
39                         </li>
40                     {% endif %}
41 
42                     {% for page in page_range %}
43                         {% if page == page_num %}  {#   current_page 是页面数据对象，不能在这里和page比较#}
44                             <li class="active"><a href="?page={{ page }}">{{ page }}</a></li>
45                         {% else %}
46                             <li><a href="?page={{ page }}">{{ page }}</a></li>
47                         {% endif %}
48 
49                     {% endfor %}
50 
51                     {% if current_page.has_next %}
52                         <li>
53                             <a href="?page={{ current_page.next_page_number }}" aria-label="Next">
54                                 <span aria-hidden="true">&raquo;</span>
55                             </a>
56                         </li>
57                     {% else %}
58                         <li class="disabled">
59                             <a href="#" aria-label="Next">
60                                 <span aria-hidden="true">&raquo;</span>
61                             </a>
62                         </li>
63                     {% endif %}
64 
65                 </ul>
66             </nav>
67         </div>
68     </div>
69 </div>
70 </body>
71 </html>

book.html

视图

 1 def book(request):
 2     book_list = Book.objects.all()
 3     paginator = Paginator(book_list, 5)  # 对book_list进行分页，每页5项
 4     page_num = int(request.GET.get('page', 1))  # 获取页面，第一次没有获取请求，设置为1
 5 
 6     # print("count:", paginator.count)  # 数据总数
 7     # print("num_pages", paginator.num_pages)  # 总页数
 8     # print("page_range", paginator.page_range)  # 页码的列表
 9 
10     if paginator.num_pages < 11:
11         page_range = paginator.page_range
12     else:
13         if page_num < 6:
14             page_range = range(1, 12)
15         elif page_num + 5 > paginator.num_pages:
16             page_range = range(paginator.num_pages - 10, paginator.num_pages + 1)
17         else:
18             page_range = range(page_num - 5, page_num + 5)
19     try:
20         current_page = paginator.page(page_num)  # 获取某一页数据对象
21     except EmptyPage:
22         current_page = paginator.page(1)  # 如果获取不到，使其获取第一页数据
23     return render(request, 'book.html', locals())

效果图

posted on 2018-11-10 15:04 潇洒浮生阅读(157) 评论(0) 编辑收藏举报