django 分页(2) 使用类 页码显示

django 分页显示页码

views.py

显示11页码

1 2 3 4 5 6 7 8 9 10 11


if 总页数（10） < 11
    起始位置 1  -  10总页数
    
else
    总页数 > 11
        IF 当前页 小于 6
        起始位置 1    结束页 11
        
            IF 当前页 大于 6
                IF 如果结束页 > 总页数
                    起始值 6 - 5   总页数
                else
                    起始值 6 - 5   结束页 6+5

#!/usr/bin/env python
#_*_coding:utf-8_*_

from django.shortcuts import render,render_to_response,redirect,HttpResponse
from app01 import models
from django.utils.safestring import mark_safe
import common
import html_helper
# Create your views here.

def index(request,page):

    page = common.try_int(page)
    hostcount = models.Host.objects.all().count()  # 获取数据库的总共条数

    pageobj = html_helper.PageInfo(page,hostcount)

    hostall = models.Host.objects.all()[pageobj.start:pageobj.end]  # 一页显示的条数

    page_html = html_helper.Pager(page,pageobj.all_page_count())

    ret = {'data':hostall,'count':hostcount,'page_ret':page_html}
    return render_to_response('index.html',ret)

html_helper.py

#!/usr/bin/env python
#_*_coding:utf-8_*_
from django.utils.safestring import mark_safe

class PageInfo(object):
    def __init__(self,current_page,all_page_count,per_item=5):
        self.CurrentPage = current_page
        self.AllCount = all_page_count
        self.PerItem = per_item

    @property
    def start(self):
        return (self.CurrentPage - 1) * self.PerItem

    @property
    def end(self):
        return self.CurrentPage * self.PerItem

    def all_page_count(self):
        '''
        tempcountpage = divmod(hostcount,pageint)
        if tempcountpage[1] == 0:
            all_page_count = tempcountpage[0]
        else:
            all_page_count = tempcountpage[0] +1

        '''
        tempcountpage = divmod(self.AllCount,self.PerItem)
        if tempcountpage[1] == 0:
            all_page_count = tempcountpage[0]
        else:
            all_page_count = tempcountpage[0] +1

        return  all_page_count


def Pager(page,all_page_count):
    # 定义一个列表，然后循环总页数，追加到列表中，
    page_html = []

    # 首页
    first_page = '<a href="/index/%d">首页</a>' % (1)
    page_html.append(first_page)

    # 上一页
    if page <= 1:
        up_page = '<a href="/index/%d">上一页</a>' % (1)
    else:
        up_page = '<a href="/index/%d">上一页</a>' % (page - 1)

    page_html.append(up_page)

    # 显示1。。。最后的页数
    if all_page_count < 12:
        begin_page = 0
        end_page = all_page_count
    else:
        if page < 6:
            begin_page = 0
            end_page = 12
        else:
            if page + 6 > all_page_count:
                begin_page = page - 6
                end_page = all_page_count
            else:
                begin_page = page - 6
                end_page = page + 6

    for i in range(begin_page,end_page):
        if page == i + 1:
            temp_html = '<a class="selected" href="/index/%d">[%d]</a>' % (i + 1, i + 1)
        else:
            temp_html = '<a href="/index/%d">[%d]</a>' % (i + 1, i + 1)

        page_html.append(temp_html)

    # 下一页
    if page >= all_page_count:
        next_page = '<a href="/index/%d">[下一页]</a>' % (all_page_count)
    else:
        next_page = '<a href="/index/%d">[下一页]</a>' % (page + 1)
        page_html.append(next_page)

    # 尾页
    end_page = '<a href="/index/%d">[尾页]</a>' % (all_page_count)
    page_html.append(end_page)

    # 使用mark_safe 可让html显示返回的a标签。join 把列表取出用空格连接
    page_html = mark_safe(' '.join(page_html))

    return  page_html