django之分页器

Posted 2020-10-28 小火星_Hirsi

tags:

篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了django之分页器相关的知识，希望对你有一定的参考价值。

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

以上是关于django之分页器的主要内容，如果未能解决你的问题，请参考以下文章

day18-2-django之分页和session