一.视图(views.py)
from django.shortcuts import render,HttpResponse
# Create your views here.
from app01.models import Book # 假设models中有一个书籍表
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
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)
'''
'''
分页器的使用:
book_list = Book.objects.all()
paginator = Paginator(book_list, 10) # 实例化对象，每页有10条数据
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) # 第2页的page对象
print(page2.has_next()) # 是否有下一页
print(page2.has_previous()) # 是否有上一页
print(page2.next_page_number()) # 下一页的页码
print(page2.previous_page_number()) # 上一页的页码
# 抛错
# page = paginator.page(12) # 超出范围的错误类型，error:EmptyPage
# page = paginator.page("z") # error:PageNotAnInteger
'''
book_list = Book.objects.all()
paginator = Paginator(book_list, 10)
current_page_num = request.GET.get('page', 1)
try:
currentPage = int(current_page_num)
book_list = paginator.page(current_page_num)
except (PageNotAnInteger, ValueError):
book_list = paginator.page(1) # 页码不是数字字符串，返回第一页
currentPage = 1
except EmptyPage:
book_list = paginator.page(paginator.num_pages) # 超范围，返回最后一页
currentPage = paginator.num_pages
return render(request, "index.html", {"book_list": book_list, "paginator": paginator, "currentPage": currentPage})
二. 模板（index.html）
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>paginator</title>
<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>
<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="/index/?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="/index/?page={{ num }}"> {{ num }} </a></li>
{% else %}
<li class="item"><a href="/index/?page={{ num }}"> {{ num }} </a></li>
{% endif %}
{% endfor %}
{% if book_list.has_next %}
<li class="next"><a href="/index/?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>
三.分页拓展
def index(request):
book_list = Book.objects.all()
paginator = Paginator(book_list, 15)
page = request.GET.get('page',1)
currentPage = int(page)
# 如果页数十分多时，换另外一种显示方式
if paginator.num_pages>11:
if currentPage - 5 < 1:
pageRange = range(1,11)
elif currentPage + 5 > paginator.num_pages:
pageRange = range(currentPage - 5, paginator.num_pages + 1)
else:
pageRange = range(currentPage - 5, currentPage + 5)
else:
pageRange = paginator.page_range
try:
book_list = paginator.page(page)
except PageNotAnInteger:
currentPage = 1
book_list = paginator.page(1)
except EmptyPage:
book_list = paginator.page(paginator.num_pages)
currentPage = paginator.num_pages
return render(request,"index.html",locals())
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