Django内置分页
Django内置分页
准备工作
import os if __name__ == '__main__': os.environ.setdefault("DJANGO_SETTINGS_MODULE", "new_pagedemo.settings") import django django.setup() from app01 import models # 列表生成式, 批量生成数据 create_list = (models.Book(title="book_%s" % i, price=i * i) for i in range(501,601)) # bulk_create()创建大量数据时使用 models.Book.objects.bulk_create(create_list)
学习研究
from app01.models import Book from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger def index(request): # 分页器的使用: book_list = Book.objects.all() # 总数据 paginator = Paginator(book_list, 10) # 传入总数据和每一页显示多少数据 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) 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,假如没有12页和不正经的输入 page=paginator.page(12) # error:EmptyPage page=paginator.page("z") # error:PageNotAnInteger return HttpResponse('ok')
使用
from app01.models import * from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger def index(request): book_list = Book.objects.all() # 总数据 paginator = Paginator(book_list, 10) # 总数居和一页显示多少数据 page = request.GET.get('page', 1) # 获取当前页码 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})
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<!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>
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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>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())