学生管理之原生分页方法

作者：@skyflask
转载本文请注明出处：https://www.cnblogs.com/skyflask/p/9601182.html

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目录

原生分页方法
1、分页方法
2、views.py
3、html文件
4、效果图

原生分页方法

1、分页方法

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#coding:utf-8 #__author:  Administrator #date:  2016/12/7   class PagerHelper:     def __init__(self,total_count,current_page,base_url,per_page=10):         self.total_count = total_count         self.current_page = current_page         self.base_url = base_url         self.per_page = per_page     '''     [1,10]     [11,20]     [21.30]     .....     [981,990]     [991,999]     每页10条记录，divmod(总记录数，10）计算出页数和剩余记录数。     比如:999条记录，则可分100页：99页每页10条，最后一页9条记录。         1000条记录，则分为100页，每页10条。     <a>href=class.html?p=1</a>  获取对应页的记录     '''     #获取每页的起始页     @property     def db_start(self):         return (self.current_page -1) * self.per_page       #获取每页的末尾页     @property     def db_end(self):         return self.current_page * self.per_page       #获取总页数     def total_page(self):         v, a = divmod(self.total_count, self.per_page)         if a != 0:             v += 1         return v       def pager_str(self):         #获取总页码         v = self.total_page()           pager_list = []         pager_list.append('<a href="%s?p=%s">首页</a>'  % (self.base_url, 1))         #如果是第一页，则不能再点击上一页了         if self.current_page == 1:             pager_list.append('<a href="javascript:void(0);">上一页</a>')         #如果不是第一页，则上一页就是current_page-1         else:             pager_list.append('<a href="%s?p=%s">上一页</a>' % (self.base_url, self.current_page - 1,))           # 6，1:12         # 7，2:13         #如果total页数小于等于11，则起始页为1，结束页为total         if v <= 11:             pager_range_start = 1             pager_range_end = v         #如果total页数大于11         #   如果当前页小于6，则起始页为1，结束页为11         #   如果当前页大于6，则起始页为当前页-5，结束页为当前页+5+1         #       如果此时结束页超出了总页数，则起始页为总页数-10，结束页为总页数+1         else:             if self.current_page < 6:                 pager_range_start = 1                 pager_range_end = 11 + 1             else:                 pager_range_start = self.current_page - 5                 pager_range_end = self.current_page + 5 + 1                 if pager_range_end > v:                     pager_range_start = v - 10                     pager_range_end = v + 1         #生成每一页的a标签连接         for i in range(pager_range_start, pager_range_end):             if i == self.current_page:                 pager_list.append('<a class="active" href="%s?p=%s">%s</a>' % (self.base_url, i, i,))             else:                 pager_list.append('<a href="%s?p=%s">%s</a>' % (self.base_url, i, i,))         #如果当前页为末尾页，则为下一页，且无法点击；否则是可以点击的下一页         if self.current_page == v:             pager_list.append('<a href="javascript:void(0);">下一页</a>')         else:             pager_list.append('<a href="%s?p=%s">下一页</a>' % (self.base_url, self.current_page + 1,))         pager_list.append('<a href="%s?p=%s">末页</a>' % (self.base_url, v))         #将所有页面放入到一个字符串         pager = "".join(pager_list)         return pager

　　

2、views.py

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@auth def handle_classes(request):     if request.method == "GET":         #models.Classes.objects.create(caption='职业打酱油一班')         #for i in range(1000):         #   models.Classes.objects.create(caption='职业打酱油'+str(i)+'班')             # 当前页         current_page = request.GET.get('p',1)         current_page = int(current_page)           # 所有数据的个数         total_count = models.Classes.objects.all().count()           from utils.page import PagerHelper         obj = PagerHelper(total_count, current_page, '/classes.html',15)         pager = obj.pager_str()           cls_list = models.Classes.objects.all()[obj.db_start:obj.db_end]           current_user = request.session.get('username')         return render(request,                       'classes.html',                       {'username': current_user, 'cls_list': cls_list, 'str_pager': pager})

　　

3、html文件

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<table border="1">         <thead>             <tr>                 <th>ID</th>                 <th>标题</th>                 <th>操作</th>             </tr>         </thead>         <tbody>             {% for item in cls_list %}                 <tr>                     <td alex="id">{{ item.id }}</td>                     <td alex="caption">{{ item.caption }}</td>                     <td>                         <a class="td-edit">编辑</a>| <a target="_blank" href="/edit_classes.html?nid={{ item.id }}">跳转编辑</a> | <a class="td-delete" href="/delete_classes.html?nid={{ item.id }}" onclick="return confirm('确定删除吗?');">删除</a>                     </td>                 </tr>             {% endfor %}         </tbody>     </table>   <div class="pagination">     {{ str_pager|safe }} </div>

　　

4、效果图