django中分页器

1.创建项目

2.在models中创建数据表

3.makemigrations和migrate进行数据迁移

4.使用pycharm自带的数据库拖动到左侧的database中形成表结构，注意：第一次使用必须下载驱动

5.在url中引用views创建路径

6.views中写视图函数

from django.shortcuts import render,HttpResponse,reverse,redirect

# Create your views here.
from app1.models import Book
from django.core.paginator import Paginator,EmptyPage

def index(request):
    '''
    批量插入数据：
    book_list = []
    for i in range(100):
        book = Book(title='book_%s'%i,price=i*i)
        book_list.append(book)

    Book.objects.bulk_create(book_list)

    return render(request,'index.html')


    分页器的使用:

    book_list=Book.objects.all()

    paginator = Paginator(book_list, 10)

    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
    '''
    book_list = Book.objects.all()
    paginator = Paginator(book_list,10)
    try:
        current_page_num = request.GET.get('page',1)
        current_page = paginator.page(current_page_num)
    except Exception as e:
        current_page_num=1
        current_page = paginator.page(1)


    return render(request,'index.html',{'current_page':current_page,'paginator':paginator})

7.html代码

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
</head>
<body>
<ul>
    {% for book in current_page %}
        <li>{{ book.title }}-----{{ book.price }}</li>
    {% endfor %}
</ul>

<nav aria-label="Page navigation">
  <ul class="pagination">
  
{#上一页的操作#}
    {% if current_page.has_previous %}
        <li><a href="?page={{ current_page.previous_page_number }}"aria-label="Previous">
            <span aria-hidden="true">上一页</span></a></li>
    {%else  %}
        <li class="disabled"><a href="">上一页</a></li>
    {% endif %}

  
{#  根据每页显示的进行分页#}
    {% for num in paginator.page_range %}
        {% if num == current_page_num %}
        <li class="active"><a href="?page={{ num }}">{{ num }}</a></li>
        {% else %}
         <li><a href="?page={{ num }}">{{ num }}</a></li>
        {% endif %}
    {% endfor %}

{#  下一页的操作#}
    {% if current_page.has_next %}
        <li><a href="?page={{ current_page.next_page_number }}"aria-label="Previous">
            <span aria-hidden="true">下一页</span></a></li></a></li>
    {%else  %}
        <li class="disabled"><a href="">下一页</a></li>
    {% endif %}




  </ul>
</nav>






</body>
</html>

 

posted on 2018-10-30 23:01  你说我记  阅读(78)  评论(0)  编辑  收藏  举报

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