Django分页（一）

手动实现简单分页

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div class="header">
    <div>
        {% for user in user_list %}
            <li>{{ user.name }} {{ user.age }} </li>
        {% endfor %}
        {{ prev_page }}<a href="/index?p={{ prev_page }}">上一页</a>
        {{ next_page }}<a href="/index?p={{ next_page }}">下一页</a>
    </div>

</div>
</body>
</html>

View Code

Views代码

from django.shortcuts import render,HttpResponse,redirect
from blog.models import *
from django.views import View
# Create your views here.
 
 
USER_LIST=[]
for i in range(888):
    temp={'name':'root'+str(i),'age':i}
    USER_LIST.append(temp)
    per_page_count = 10  # 定义每页要显示多少行数据
 
 
def get_index(request):
 
    current_page=request.GET.get('p')#获取客户端传过来的参数，得到翻到哪一页
    current_page = int(current_page)  # 字符--〉数字
    start = (current_page - 1) * per_page_count  # 定义从哪一行开始
    end = current_page * per_page_count  # 定义数据在哪一行结束
    data = USER_LIST[start:end]  # 对数据进行切片
    # p=1
    # 0,10  0-9
    # p=2
    # 10,20 10-19
    <br>#上一页
    prev_page=current_page-1
#下一页
    next_page=current_page+1
 
    return render(request,"index.html",{'user_list':data,'prev_page':prev_page,'next_page':next_page})

Django分页简单使用

在html文件下创建include目录，然后把分页功能代码放入其中

使用include引入功能html文件

功能html文件如下：

{% if posts.has_previous %}
    <a href="?p={{ posts.previous_page_number }}">Previous</a>
{% endif %}
<span class="current">
    Page {{ posts.number }} of {{ posts.paginator.num_pages }}.
</span>
{% if posts.has_next %}
<a href="?p={{ posts.next_page_number }}">Next</a>
{% endif %}

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div class="header">
    <div>

        <ul>
            {% for user in posts.object_list %}
            <li>{{ user.name }} {{ user.age }} </li>
            {% endfor %}

        </ul>


        {% if posts.has_previous %}
            <a href="?p={{ posts.previous_page_number }}">Previous</a>
        {% endif %}
        <span class="current">
            Page {{ posts.number }} of {{ posts.paginator.num_pages }}.
        </span>
        {% if posts.has_next %}
        <a href="?p={{ posts.next_page_number }}">Next</a>
        {% endif %}
            <!--{%  include 'include/page1.html'  %}-->

    </div>

</div>
</body>
</html>

View Code

View代码

from django.shortcuts import render,HttpResponse,redirect
from blog.models import *
from django.views import View
# Create your views here.
USER_LIST=[]
for i in range(888):
    temp={'name':'root'+str(i),'age':i}
    USER_LIST.append(temp)
    per_page_count = 10  # 定义每页要显示多少行数据
 
from django.core.paginator import Paginator,EmptyPage,PageNotAnInteger
def get_index1(request):
 
 
    #django分页主要有两个对象：paginator与page对象
 
    #如果这里是表的话models.表名.objects.all()来操作
    #将表里所有的内容都放进去，每页显示１０条记录
    paginator=Paginator(USER_LIST,10) #实例化Paginator
    #全部数据：USER_LIST
    #per_page:每页显示条目数量
    #count:数据据总个数
    #num_pages:总页数
    #page_range:总页数的索引范围
    #page:page对象(是否有上一页，是否有下一页)
 
    current_page=request.GET.get('p')
    current_page = int(current_page)  # 字符--〉数字
    print(current_page)
 
    try:
        posts = paginator.page(current_page)
        # 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
        # print(posts.object_list)
    except PageNotAnInteger:#如果输入内容不为整数，传入页面１
        posts = paginator.page(1)
    except EmptyPage:
        posts = paginator.page(paginator.num_pages)
    return render(request, 'index1.html', {'posts': posts})

Django分页自定义使用

功能html

{% if posts.has_previous %}
    <a href="?p={{ posts.previous_page_number }}">Previous</a>
{% endif %}
 
    {% for i in posts.paginator.page_num_range %}
        <a href="?p={{ i }}">{{ i }}</a>
    {% endfor %}
 
    {% if posts.has_next %}
        <a href="?p={{ posts.next_page_number }}">Next</a>
    {% endif %}

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div class="header">
    <div>
 
        <ul>
            {% for user in posts.object_list %}
            <li>{{ user.name }} {{ user.age }} </li>
            {% endfor %}
 
        </ul>
            {%  include 'include/page1.html'  %}
 
    </div>
 
</div>
</body>
</html>

View代码

class CustomPaginator(Paginator):
    def __init__(self, current_page, max_pager_num, *args, **kwargs):
        """
        :param current_page: 当前页
        :param max_pager_num:最多显示的页码个数
        :param args:
        :param kwargs:
        :return:
        """
        self.current_page = int(current_page)
        self.max_pager_num = max_pager_num
        super(CustomPaginator, self).__init__(*args, **kwargs)
 
    def page_num_range(self):
        # 当前页面
        # self.current_page
        # 总页数
        # self.num_pages
        # 最多显示的页码个数
        # self.max_pager_num
        print(1)
        if self.num_pages < self.max_pager_num:
            return range(1, self.num_pages + 1)
        print(2)
        part = int(self.max_pager_num / 2)
        if self.current_page - part < 1:
            return range(1, self.max_pager_num + 1)
        print(3)
        if self.current_page + part > self.num_pages:
            return range(self.num_pages + 1 - self.max_pager_num, self.num_pages + 1)
        print(4)
        return range(self.current_page - part, self.current_page + part + 1)
 
 
def get_index2(request):
    current_page = request.GET.get('p')
    current_page=int(current_page)
    paginator = CustomPaginator(current_page, 11, 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)
        # 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
        print(posts.object_list)
    except PageNotAnInteger:
        posts = paginator.page(1)
    except EmptyPage:
        posts = paginator.page(paginator.num_pages)
 
    return render(request, 'index2.html', {'posts': posts})