Django框架----分页器（paginator）
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Django框架----分页器（paginator）
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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, PageNotAnIntegerdef index(request):'''批量導入數(shù)據:Booklist=[]for i in range(100):Booklist.append(Book(title="book"+str(i),price=30+i*i))Book.objects.bulk_create(Booklist)'''''' 分頁器的使用:book_list=Book.objects.all()paginator = Paginator(book_list, 10)print("count:",paginator.count) #數(shù)據總數(shù)print("num_pages",paginator.num_pages) #總頁數(shù)print("page_range",paginator.page_range) #頁碼的列表page1=paginator.page(1) #第1頁的page對象for i in page1: #遍歷第1頁的所有數(shù)據對象print(i)print(page1.object_list) #第1頁的所有數(shù)據page2=paginator.page(2)print(page2.has_next()) #是否有下一頁print(page2.next_page_number()) #下一頁的頁碼print(page2.has_previous()) #是否有上一頁print(page2.previous_page_number()) #上一頁的頁碼# 拋錯#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})?view.py
def chakanbook(request):'''批量導入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打印的是一個對象 先查看所有的書paginator=Paginator(book_list,5) #這里的book_list必須是一個集合對象，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(shù)范圍,默認有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)# 如果頁數(shù)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_rangetry: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())轉載于:https://www.cnblogs.com/TheLand/p/8760208.html
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