django的分页系统

django自带的分页

from django.contrib import admin
from django.urls import path,re_path
from app01 import views
urlpatterns = [
    
    re_path(r'^index.html', views.index),
]
urls.py
def index(request):

    current_page = request.GET.get('page')
    user_list=models.UserInfo.objects.all()
    paginator = Paginator(user_list,10)
    # per_page: 每页显示条目数量
    # count:    数据总个数
    # num_pages:总页数
    # page_range:总页数的索引范围，如: (1,10),(1,200)
    # page:     page对象
    try:
        posts=paginator.page(current_page)
    except Exception as e:
        posts = paginator.page(1)
    # has_next              是否有下一页
    # next_page_number      下一页页码
    # has_previous          是否有上一页
    # previous_page_number  上一页页码
    # object_list           分页之后的数据列表
    # number                当前页
    # paginator             paginator对象

    return render(request,'index.html',{'posts':posts})
views.py
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<ul>
    {% for i in posts.object_list %}
        <li>{{ i.name }}</li>
    {% endfor %}
</ul>
<div>

    {% if posts.has_previous %}
        <a href="/index.html?page={{ posts.previous_page_number }}">上一页</a>
    {% endif %}
    {% for num in posts.paginator.page_range %}
        <a href="/index.html?page={{ num }}">{{num}}</a>
    {% endfor %}
    {% if posts.has_next %}
        <a href="/index.html?page={{ posts.next_page_number }}">下一页</a>
    {% endif %}


</div>

</body>
</html>
index.html

 自己写的分页类

class PageInfo():
    def __init__(self,base_url,current_page,per_page,all_count,show_page):
        '''

        :param base_url: 需要的url
        :param current_page: 当前页码，一般用get请求获得
        :param per_page: 每一页显示多少条数据
        :param all_count: 数据总条数
        :param show_page: 显示的总条数，例如显示34567，随着页码变换，也会动态变动
        '''
        try:
            self.current_page=int(current_page)
        except Exception as e:
            self.current_page=1
        self.base_url=base_url
        self.per_page=per_page
        self.all_count=all_count
        self.show_page=show_page
        a,b=divmod(self.all_count,self.per_page)
        if b:
            a=a+1
        self.all_pager=a
    def start(self):
        return (self.current_page - 1) * self.per_page
    def end(self):
        return self.current_page * self.per_page
    def pager(self):
        # v="<a href='/custom.html?page=1'>1</a>"
        # return v
        page_list=[]
        half=int((self.show_page-1)/2)
        if self.all_pager<self.show_page:
            begin=1
            stop=self.all_pager+1
        else:
            if self.current_page<=half:
                begin=1
                stop=self.show_page+1
            elif self.current_page>self.all_pager-half:
                begin=self.all_pager-self.show_page+1
                stop=self.all_pager+1
            else:
                begin=self.current_page-half
                stop=self.current_page+half+1
        if self.current_page<=1:
            prev="<a style='display:inline-block; margin:5px' >上一页</a>"
        else:
            prev="<a style='display:inline-block; margin:5px' href='%s?page=%s'>上一页</a>"%(self.base_url,self.current_page-1)
        page_list.append(prev)
        for i in range(begin,stop):
            if i==self.current_page:
                temp="<a style='display:inline-block; background-color:red; margin:5px' href='%s?page=%s'>%s</a>"%(self.base_url,i,i)
            else:
                temp="<a style='display:inline-block; margin:5px' href='%s?page=%s'>%s</a>"%(self.base_url,i,i)
            page_list.append(temp)
        if self.current_page>=self.all_pager:
            nex="<a style='display:inline-block; margin:5px' >下一页</a>"
        else:
            nex="<a style='display:inline-block; margin:5px' href='%s?page=%s'>下一页</a>"%(self.base_url,self.current_page+1)
        page_list.append(nex)
        return ''.join(page_list)
View Code

 

posted @ 2018-09-20 09:10  平常心u  阅读(102)  评论(0)  编辑  收藏  举报