一、什么是分页功能
二、Django的分页器（paginator）
语法：
paginator = Paginator(book_list, 8) #8条一页
print("count:", paginator.count) # 数据总数
print("num_pages", paginator.num_pages) # 总页数
print("page_range", paginator.page_range) # 页码的列表
page1 = paginator.page(1) # 第1页的page对象
for i in page1: # 遍历第1页的所有数据对象
print(i)
print(page1.object_list) # 第1页的所有数据
page2 = paginator.page(2)
print(page2.has_next()) # 是否有下一页
print(page2.next_page_number()) # 下一页的页码
print(page2.has_previous()) # 是否有上一页
print(page2.previous_page_number()) # 上一页的页码
views.py
from django.shortcuts import render,HttpResponse # Create your views here.
from django.shortcuts import render,HttpResponse # Create your views here.
from app01.models import *
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger from .models import *
#添加数据
def add(request):
book_list=[]
for i in range(1000):
book_obj=Book(title="book-%s"%i,price=i*24)
book_list.append(book_obj)
Book.objects.bulk_create(book_list) return HttpResponse("添加成功") def index(request):
'''
paginator = Paginator(book_list, 8) #8条一页 print("count:", paginator.count) # 数据总数
print("num_pages", paginator.num_pages) # 总页数
print("page_range", paginator.page_range) # 页码的列表 page1 = paginator.page(1) # 第1页的page对象
for i in page1: # 遍历第1页的所有数据对象
print(i) print(page1.object_list) # 第1页的所有数据 page2 = paginator.page(2)
print(page2.has_next()) # 是否有下一页
print(page2.next_page_number()) # 下一页的页码
print(page2.has_previous()) # 是否有上一页
print(page2.previous_page_number()) # 上一页的页码 :param request:
:return:
'''
current_page=int(request.GET.get("page",1))
book_list=Book.objects.all() paginator=Paginator(book_list,10)
page=paginator.page(current_page) #如果页数超过一定数量，就换方式展示
if paginator.num_pages > 11:
if current_page - 5 < 1:
pageRange = range(1, 11)
elif current_page + 5 > paginator.num_pages:
pageRange = range(paginator.num_pages - 9, paginator.num_pages + 1)
else:
pageRange = range(current_page - 5, current_page + 5) else:
pageRange = paginator.page_range return render(request,"index.html",locals())
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
<link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
</head>
<body> <ul>
{% for book in page %}
<li>{{ book.title }}-----{{ book.price }}</li>
{% endfor %}
</ul> <nav aria-label="Page navigation">
<ul class="pagination">
<li>
<a href="?page={{ current_page|add:-1 }}" aria-label="Previous">
上一页
</a>
</li> {% for num in pageRange %}
{% if current_page == num %}
<li class="active"><a href="?page={{ num }}">{{ num }}</a></li>
{% else %}
<li><a href="?page={{ num }}">{{ num }}</a></li>
{% endif %} {% endfor %} {% if page.has_next %}
<li><a href="?page={{ current_page|add:1 }}" aria-label="Next">下一页</a></li>
{% else %} {% endif %}
</ul>
</nav> </body>
</html>
"""page_demo URL Configuration The `urlpatterns` list routes URLs to views. For more information please see:
https://docs.djangoproject.com/en/1.11/topics/http/urls/
Examples:
Function views
1. Add an import: from my_app import views
2. Add a URL to urlpatterns: url(r'^$', views.home, name='home')
Class-based views
1. Add an import: from other_app.views import Home
2. Add a URL to urlpatterns: url(r'^$', Home.as_view(), name='home')
Including another URLconf
1. Import the include() function: from django.conf.urls import url, include
2. Add a URL to urlpatterns: url(r'^blog/', include('blog.urls'))
"""
from django.conf.urls import url
from django.contrib import admin
from app01 import views
urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^add/', views.add),
url(r'^index/', views.index),
]
urls.py
from django.db import models # Create your models here. class Book(models.Model):
title=models.CharField(max_length=32)
price=models.DecimalField(max_digits=8,decimal_places=2)
models.py