Django中分页器的使用
django分页器模块
#分页器 from django.core.paginator import Paginator,EmptyPage,PageNotAnInteger
分页器常用方法：
def index(request): book_list=Book.objects.all() #实例化分页器对象，第二个对象是每页最大条数 paginator=Paginator(book_list,21) #三个静态方法 print('count',paginator.count) #数据总数 print('num_pages',paginator.num_pages) #总页数 print('page_range',paginator.page_range) #页码范围，相当于（1，总页数+1） #取某一页的page对象 page1=paginator.page(1) #第一页的page对象 #遍历第一页的数据对象的两种方式 for i in page1: print(i) print(page1.object_list) 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()) #上一页页码 return render(request,'index.html',locals())
正式建一个分页器：
views：
from django.shortcuts import render,redirect from .models import * #分页器 from django.core.paginator import Paginator,EmptyPage,PageNotAnInteger # Create your views here. def add(request): #数据库批量添加 book_list=[] for i in range(500): book_obj=Book(title='book%s'%i,price=i) book_list.append(book_obj) Book.objects.bulk_create(book_list) return redirect('/index/') def index(request): current_page_num=int(request.GET.get('page',1)) book_list = Book.objects.all() paginator=Paginator(book_list,11) page=paginator.page(current_page_num)
html（利用bootstrap框架）：
<body> <ul> {% for book in page %} <li>{{ book.pk }}--{{ book.title }}--{{ book.price }}</li> {% endfor %} </ul> <nav aria-label="Page navigation"> <ul class="pagination"> <li> <a href="?page={{ current_page_num|add:-1 }}" aria-label="Previous">上一页</a> </li> {% for num in paginator.page_range %} {% if current_page_num == 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#} {% if page.has_next %} <li> <a href="?page={{ current_page_num|add:1 }}" aria-label="Next">下一页</a> </li> {% else %} <li class="disabled"> <a href="#" aria-label="Next">下一页</a> </li> {% endif %} </ul> </nav> </body>
页数比较多时，不一一显示：
可以加一段逻辑
def index(request): current_page_num=int(request.GET.get('page',1)) book_list = Book.objects.all() paginator=Paginator(book_list,11) num_pages=paginator.num_pages #总页数过多时，不一一显示 if num_pages>11: if current_page_num<6: page_range=range(1,12) elif current_page_num>num_pages-5: page_range=range(num_pages-10,num_pages+1) else: page_range=range(current_page_num-5,current_page_num+6) else: page_range=paginator.page_range page=paginator.page(current_page_num)