Django基础-数据分页

2019独角兽企业重金招聘Python工程师标准>>>

pager.py

# -*- coding:utf8 -*-
"""
引用说明：
数据总个数：total_count
数据总页数：num_pages
每页显示的行数：perPageItemNum【默认显示10行】
最多显示页码数：maxPageNum【默认显示7个页码数】
默认返回页面：get_people.html【如需修改请批量替换】
"""
class Pagination(object):
    # 需要传入的值：数据总个数、当前页、每页显示行数、最多显示页码
    def __init__(self,totalCount,currentPage,perPageItemNum=10,maxPageNum=3):
        # 数据总个数
        self.total_count = totalCount
        try:
            # 当前页
            v = int(currentPage)
            if v <= 0:
               v = 1
            self.current_page = v
        except Exception as e:
            self.current_page = 1
        # 每页显示的行数
        self.per_page_item_num = perPageItemNum
        # 最多显示页面
        self.max_page_num = maxPageNum
    #页数显示切片起始位
    def start(self):
        return (self.current_page-1) * self.per_page_item_num

    # 页数显示切片结束位
    def end(self):
        return self.current_page * self.per_page_item_num
    @property
    def num_pages(self):
        """
        总页数
        """
        a,b = divmod(self.total_count,self.per_page_item_num)
        if b == 0:
            return a
        return a+1
    #页码范围
    def pager_num_range(self):
        if self.num_pages < self.max_page_num:
            return range(1,self.num_pages+1)
        part = int(self.max_page_num/2)
        if self.current_page <= part:
            return range(1,self.max_page_num+1)
        if (self.current_page + part) > self.num_pages:
            return range(self.num_pages-self.max_page_num+1,self.num_pages+1)
        return range(self.current_page-part,self.current_page+part+1)

    def page_str(self):
        page_list = []

        first = "<li><a href='get_people.html?p=1'>首页</a></li>"
        page_list.append(first)

        if self.current_page == 1:
            prev = "<li><a href='#'>上一页</a></li>"
        else:
            prev = "<li><a href='get_people.html?p=%s'>上一页</a></li>" %(self.current_page-1,)
        page_list.append(prev)
        for i in self.pager_num_range():
            if i == self.current_page:
                temp = "<li class='active'><a href='get_people.html?p=%s'>%s</a></li>" %(i,i)
            else:
                temp = "<li><a href='get_people.html?p=%s'>%s</a></li>" % (i, i)
            page_list.append(temp)

        if self.current_page == self.num_pages:
            nex = "<li><a href='#'>下一页</a></li>"
        else:
            nex = "<li><a href='get_people.html?p=%s'>下一页</a></li>" % (self.current_page + 1,)
        page_list.append(nex)

        last = "<li><a href='get_people.html?p=%s'>尾页</a></li>" %(self.num_pages,)
        page_list.append(last)

        return ''.join(page_list)

调用示例

from APP.views.pager import Pagination
#引用分页模块
def get_people(request):                                        #成员展示
    Gro_list = models.Group.objects.all()                                   #获取所有群组列表
    Dep_list = models.Department.objects.all()                              #获取所有部门列表
    people_list = models.People.objects.all()                               #获取所有人员列表
    people_num = models.People.objects.count()                              #获取所有人员数量
    #人员分页显示
    dq_Page = request.GET.get('p')                                          #获取当前页
    if dq_Page==None:dq_Page=1                                              #第一次打开无页码传入是默认打开显示第一页
    page_obj = Pagination(people_num,dq_Page)                               #引入分页模块传入人员数量和当前页
    data_list = people_list[page_obj.start():page_obj.end()]                #切片获取当前页应该显示人员列表

    return render(request,'get_people.html',locals())

分页前端页面代码

<link rel="stylesheet" href="../static/bootstrap/dist/css/bootstrap.css">
<script src="../static/js/jquery-3.3.1.min.js"></script>
<script src="../static/bootstrap/dist/js/bootstrap.min.js"></script>
<!--引用样式模块-->

<div class="w_page">
    <ul class="pagination pagination-sm">
        {{ page_obj.page_str|safe }}
    </ul>
    <div class="page_tag">
        {{ dq_Page }}/{{ page_obj.num_pages }}
    </div>
</div>

转载于:https://my.oschina.net/zhaojunhui/blog/2906889