Django(五)--分页器（paginator）

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分页器的使用

>>> from django.core.paginator import Paginator>>> objects = ['john', 'paul', 'george', 'ringo']>>> p = Paginator(objects, 2) >>> p.count        #数据总数4>>> p.num_pages    #总页数2>>> type(p.page_range)  # `<type 'rangeiterator'>` in Python 2.<class 'range_iterator'>>>> p.page_range        #页码的列表range(1, 3)     # =========[1,2] >>> page1 = p.page(1)   #第1页的page对象>>> page1<Page 1 of 2>>>> page1.object_list   #第1页的数据['john', 'paul'] >>> page2 = p.page(2)>>> page2.object_list    #第2页的数据['george', 'ringo']>>> page2.has_next()     #是否有下一页False>>> page2.has_previous() #是否有上一页True>>> page2.has_other_pages() #是否有其他页True>>> page2.next_page_number() #下一页的页码Traceback (most recent call last):...EmptyPage: That page contains no results>>> page2.previous_page_number()  #上一页的页码1>>> page2.start_index() # 本页第一条记录的序数（从1开始）3>>> page2.end_index() # 本页最后录一条记录的序数（从1开始）4 >>> p.page(0)       #错误的页，抛出异常Traceback (most recent call last):...EmptyPage: That page number is less than 1>>> p.page(3)       #错误的页，抛出异常Traceback (most recent call last):...EmptyPage: That page contains no results

实现一个分页效果：

Template:

{% load staticfiles %}<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>Title</title>    <link rel="stylesheet" href="{% static 'bootstrap.css' %}"></head><body><div class="container">    <h4>分页器</h4>    <ul>    {% for book in book_list %}         <li>{{ book.title }} {{ book.price }}</li>    {% endfor %}</ul>    <ul class="pagination" id="pager">                 {% if book_list.has_previous %}                    <li class="previous"><a href="/blog/?page={{ book_list.previous_page_number }}">上一页</a></li>                 {% else %}                    <li class="previous disabled"><a href="#">上一页</a></li>                 {% endif %}                 {% for num in paginator.page_range %}                     {% if num == currentPage %}                       <li class="item active"><a href="/blog/?page={{ num }}">{{ num }}</a></li>                     {% else %}                       <li class="item"><a href="/blog/?page={{ num }}">{{ num }}</a></li>                     {% endif %}                 {% endfor %}                 {% if book_list.has_next %}                    <li class="next"><a href="/blog/?page={{ book_list.next_page_number }}">下一页</a></li>                 {% else %}                    <li class="next disabled"><a href="#">下一页</a></li>                 {% endif %}            </ul></div></body></html>

views：

from django.shortcuts import render,HttpResponse# Create your views here.from django.core.paginator import Paginator, EmptyPage, PageNotAnIntegerfrom app01.models import *def index(request):    '''    批量导入数据:    Booklist=[]    for i in range(100):        Booklist.append(Book(title="book"+str(i),price=30+i*i))    Book.objects.bulk_create(Booklist)    '''    book_list=Book.objects.all()    paginator = Paginator(book_list, 10)    page = request.GET.get('page',1)    currentPage=int(page)    try:        print(page)        book_list = paginator.page(page)    except PageNotAnInteger:        book_list = paginator.page(1)    except EmptyPage:        book_list = paginator.page(paginator.num_pages)    return render(request,"index.html",locals())

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