Django的分页器(paginator) views.py from django.shortcuts import render,HttpResponse # Create your views here. from app01.models import * from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger def index(request): ''
Django的分页器(paginator)
views.py
from django.shortcuts import render,HttpResponse# Create your views here.
from app01.models import *
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)
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
# 抛错
#page=paginator.page(12) # error:EmptyPage
#page=paginator.page("z") # error:PageNotAnInteger
'''
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",{"book_list":book_list,"paginator":paginator,"currentPage":currentPage})
views.py
index.html
<!DOCTYPE html><html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</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>
index.html
扩展
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:
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())
views.py
cnblog项目views.py
from django.shortcuts import render, redirect, HttpResponse# Create your views here.
from .models import Book
from django.core.paginator import Paginator, EmptyPage
def index(request):
# 批量导入数据
# 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) # 批量插入多条数据
# return render(request, 'index.html', locals())
book_list = Book.objects.all() # QuerySet列表
# 分页器
paginator = Paginator(book_list, 10)
print("数据总数:", paginator.count)
print("总页数", paginator.num_pages)
print("页码列表", paginator.page_range)
current_page_num = int(request.GET.get("page", 1))
if paginator.num_pages > 11:
if current_page_num - 5 < 1:
page_range = range(1, 12)
elif current_page_num + 5 > paginator.num_pages:
page_range = range(paginator.num_pages - 10, paginator.num_pages + 1)
else:
page_range = range(current_page_num - 5, current_page_num + 6)
else:
page_range = paginator.page_range
try:
current_page = paginator.page(current_page_num)
# 显示某一页具体数据的两种方式
print("object_list", current_page.object_list)
for i in current_page:
print(i)
except EmptyPage as e:
current_page = paginator.page(1)
return render(request, "index.html", locals())
views.py
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