Django之分頁初級版本
阿新 • • 發佈：2018-12-06
Django的分頁器（paginator）
view.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):
'''
批量匯入資料:
Booklist=[]
for i in range(100):
Booklist.append(Book(title="book"+str(i),price=30+i*i))
Book.objects.bulk_create(Booklist)
view.py
def chakanbook(request):
'''
批量匯入
Booklist = []
for i in range(100):
Booklist.append(models.Book(title="book" + str(i), price=20 + i * i))
models.Book.objects.bulk_create(Booklist)
:param request:
:return:
'''
book_list = models.Book.objects.all()# book_list列印的是一個物件 先檢視所有的書
paginator=Paginator(book_list,5) #這裡的book_list必須是一個集合物件，把所有的書分頁，一頁有五個
print(paginator.page_range) #range(1, 4)
num = request.GET.get("page",2)#得到頁數範圍,預設有1頁
print(num,type(num))
book_list = paginator.page(num) #顯示第一頁的內容
return render(request,"chakan.html",{"book_list":book_list,"page_range":page_range,"num":int(num),"paginator":paginator})
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>分頁器</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 }}">上一頁</a></li>
{% else %}
<li class="previous disabled"><a href="#">上一頁</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 }}">下一頁</a></li>
{% else %}
<li class="next disabled"><a href="#">下一頁</a></li>
{% endif %}
</ul>
</div>
</body>
</html>
擴充套件
def index(request):
book_list=Book.objects.all()
paginator = Paginator(book_list, 15)
page = request.GET.get('page',1)
currentPage=int(page)
# 如果頁數十分多時，換另外一種顯示方式
if paginator.num_pages>30:
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())