分页器基本案例思路
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app01/models.py
from django.db import models # Create your models here. class Book(models.Model): title=models.CharField(max_length=32) price=models.DecimalField(max_digits=6,decimal_places=2)
app01/page.py
import copy class Pagination(object): def __init__(self, current_page, all_count, request, per_page=10, max_pager_num=11): try: current_page = int(current_page) except Exception as e: current_page = 1 if current_page < 1: current_page = 1 self.current_page = current_page self.all_count = all_count self.per_page = per_page num_pages, tmp = divmod(all_count, per_page) if tmp: num_pages += 1 self.num_pages = num_pages self.max_pager_num = max_pager_num self.pager_count_half = int((self.max_pager_num - 1) / 2) import copy self.parmas = copy.deepcopy(request.GET) print("++++++++", self.parmas.urlencode()) @property def start(self): return (self.current_page - 1) * self.per_page @property def end(self): return self.current_page * self.per_page def page_html(self): if self.num_pages <= self.max_pager_num: pager_start = 1 pager_end = self.num_pages + 1 else: if self.current_page <= self.pager_count_half: pager_start = 1 pager_end = self.max_pager_num + 1 elif (self.current_page + self.pager_count_half) > self.num_pages: pager_start = self.num_pages - self.max_pager_num + 1 pager_end = self.num_pages + 1 else: pager_start = self.current_page - self.pager_count_half pager_end = self.current_page + self.pager_count_half + 1 pager_html_list = [] # 首页，上一页 self.parmas["page"]=1 first_page = ‘<nav aria-label="Page navigation"><ul class="pagination"><li><a href="?%s">首页</a></li>‘ % ( self.parmas.urlencode(),) pager_html_list.append(first_page) if self.current_page <= 1: prev_page = ‘<li class="disabled"><a href="#">上一页</a></li>‘ else: self.parmas["page"]=self.current_page-1 prev_page = prev_page = ‘<li><a href="?%s">上一页</a></li>‘ % (self.parmas.urlencode(),) pager_html_list.append(prev_page) # 每一页页码 for i in range(pager_start, pager_end): self.parmas["page"] = i if i == self.current_page: temp = ‘<li class="active"><a href="?%s">%s</a></li>‘ % (self.parmas.urlencode(), i,) else: temp = ‘<li><a href="?%s">%s</a></li>‘ % (self.parmas.urlencode(), i) pager_html_list.append(temp) # 最后一页，下一页 self.parmas["page"] =self.current_page+1 if self.current_page >= self.num_pages: next_page = ‘<li class="disabled"><a href="#">下一页</a></li>‘ else: next_page = ‘<li><a href="?%s">下一页</a></li>‘ % (self.parmas.urlencode(),) pager_html_list.append(next_page) self.parmas["page"]=self.num_pages last_page = ‘<li><a href="?%s">尾页</a></li></ul></nav>‘ % (self.parmas.urlencode()) pager_html_list.append(last_page) return ‘‘.join(pager_html_list)
app01/views.py
def index(request): book_list1 = Book.objects.all() current_page = request.GET.get("page") print(">>",current_page) pagination = Pagination(current_page, book_list1.count(),request,per_page=5,max_pager_num=11) book_list = book_list1[pagination.start:pagination.end] return render(request, "index2.html", locals())
templates/index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>分页器</title> <!-- 最新版本的 Bootstrap 核心 CSS 文件 --> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous"> </head> <body> <div> <ul> {% for book in book_list %} <li> {{ book.title }}-----{{ book.price }} </li> {% endfor %} </ul> {{pagination.page_html|safe}} </div> </body> </html>
项目总路由/urls.py
from django.contrib import admin from django.urls import path from app01 import views urlpatterns = [ path(‘admin/‘, admin.site.urls), path(‘index/‘, views.index), ]
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