python__Django 分页

自定义分页的类:

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Created by Mona on 2017/9/20


from django.utils.safestring import mark_safe

class Paginator:
    '''
    页码的格式依赖于bootstrap;
    使用案例:
        
    from django.shortcuts import render,redirect,HttpResponse
    from app01.models import *
    from tools import page  导入
        
    def index(request):
        base_url = request.path_info
        total_item_count = UserInfo.objects.all().count()
        current_page = int(request.GET.get('page',1))
    
        page_obj = page.Paginator(total_item_count,current_page,base_url)
    
        user_list = UserInfo.objects.all()[page_obj.start:page_obj.end]
    
        return render(request,'index.html',{'user_list':user_list,'html_page': page_obj.pager})
    
    '''
    def __init__(self,total_item_count,current_page,base_url,
          per_page_item_count=10,show_pager_count=11): ''' :param total_item_count: 总记录数 :param current_page: 当前页码 :param base_url: 页码的前缀URL :param per_page_item_count: 每页显示的记录数 :param show_pager_count: 显示的页码个数 ''' self.total_item_count = total_item_count self.current_page = current_page self.base_url = base_url self.per_page_item_count = per_page_item_count self.show_pager_count = show_pager_count total_page, res = divmod(self.total_item_count, self.per_page_item_count) if res: total_page += 1 self.total_page = total_page self.half_show_pager_count = int(total_page/2) @property def start(self): ''' 页码查询数据的开始位置 :return: ''' return (self.current_page-1)*self.per_page_item_count @property def end(self): ''' 页码查询数据的结束位置 :return: ''' return self.current_page*self.per_page_item_count @property def pager(self): ''' 返回需要的前端页码 :return: ''' page_list = [] ul = ' <ul class="pagination">' page_list.append(ul) if self.current_page == 1: prev = ' <li><a href="#">上一页</a></li>' else: prev = ' <li><a href="%s?page=%s">上一页</a></li>' % (self.base_url, self.current_page - 1) page_list.append(prev) # 如果数据特别少: if self.total_page < self.show_pager_count: pager_start = 1 pager_end = self.total_page + 1 else: if self.current_page <= self.half_show_pager_count: pager_start = 1 pager_end = self.show_pager_count + 1 else: if self.current_page + self.half_show_pager_count > self.total_page: pager_start = self.total_page - self.show_pager_count + 1 pager_end = self.total_page + 1 else: pager_start = self.current_page - self.half_show_pager_count pager_end = self.current_page + self.half_show_pager_count + 1 for i in range(pager_start, pager_end): if i == self.current_page: tpl = ' <li class="active"><a href="%s?page=%s">%s</a></li>' % (self.base_url, i, i,) else: tpl = ' <li><a href="%s?page=%s">%s</a></li>' % (self.base_url, i, i,) page_list.append(tpl) if self.current_page == self.total_page: nex = ' <li><a href="#">下一页</a></li>' else: nex = ' <li><a href="%s?page=%s">下一页</a></li>' % (self.base_url, self.current_page + 1,) page_list.append(nex) lu = ' </ul>' page_list.append(lu) html_page = mark_safe(''.join(page_list)) return html_page

效果展示:

posted @ 2017-09-20 16:36  皖心  阅读(162)  评论(0编辑  收藏  举报