Django自定制分页功能
Posted ago-0912
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URL:
"""django_paginner URL Configuration
The `urlpatterns` list routes URLs to views. For more information please see:
https://docs.djangoproject.com/en/2.1/topics/http/urls/
Examples:
Function views
1. Add an import: from my_app import views
2. Add a URL to urlpatterns: path(‘‘, views.home, name=‘home‘)
Class-based views
1. Add an import: from other_app.views import Home
2. Add a URL to urlpatterns: path(‘‘, Home.as_view(), name=‘home‘)
Including another URLconf
1. Import the include() function: from django.urls import include, path
2. Add a URL to urlpatterns: path(‘blog/‘, include(‘blog.urls‘))
"""
from django.contrib import admin
from django.urls import path
from app01 import views
urlpatterns = [
path(‘admin/‘, admin.site.urls),
path(‘index/‘, views.index),
path(‘index1/‘, views.index1),
]
views:
from django.shortcuts import render, HttpResponse from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger # Create your views here. USER_LIST = [] for i in range(1, 659): temp = {‘name‘: ‘root‘ + str(i), ‘age‘: i} USER_LIST.append(temp) def index(request): # 当前的页数 current_page = request.GET.get(‘p‘) # 每页显示10个 per_page_count = 10 # 第一页(0,10)索引是0到9 # 第二页(10,20)索引是10到19 current_page = int(current_page) # 开始:当前页-1*每页显示10个 # 第二页 # (2-1)*10 start = (current_page - 1) * per_page_count # 2*10 end = current_page * per_page_count data = USER_LIST[start:end] if current_page <= 1: prev_page = 1 prev_page = current_page - 1 next_page = current_page + 1 return render(request, ‘index.html‘, {‘user_list‘: data, ‘prev_page‘: prev_page, ‘next_page‘: next_page}) class CustomPaginator(Paginator): def __init__(self, current_page, per_pager_num, *args, **kwargs): # 当前页 self.current_page = int(current_page) # 每页最多显示页码数量 self.per_page_num = int(per_pager_num) super(CustomPaginator, self).__init__(*args, **kwargs) def pager_num_range(self): # 当前页 # self.current_page # 每页最多能显示的页码数量,漂亮最好取奇数 11 # self.per_page_num # 总页数 # self.num_pages # 总页数是django分页功能根据数据大小自动分配好的 # 如果总页数小于每页最多能显示的页码数量 # 那么就返回range(第一页到总页数+1),因为range取值是取(开头,结尾-1) if self.num_pages < self.per_page_num: return range(1, self.num_pages + 1) # 总页数特别多 # 当你的当前页 小于或等于,最多显示的页数的一半时,显示前五个,后五个 part = int(self.per_page_num / 2) if self.current_page <= part: # return range(1, part + 1) return range(1, self.per_page_num + 1) # 极限值:如果当前页+最多显示页数一半>总页数(超出了显示的范围) # 返回range(总页数-最多显示的页数,总页数+1) if (self.current_page + part) > self.num_pages: return range(self.num_pages-self.per_page_num, self.num_pages + 1) # if self.current_page > part: return range(self.current_page - part, self.current_page + part + 1) def index1(request): # 全部数据:USER_LIST=得出共有多少条数据 # 10, # per_page: 每页显示条目数量 # count: 数据总个数 # num_pages:总页数 # page_range:总页数的索引范围，如: (1,10),(1,200) # page: page对象(是否具有下一页;是否有上一页) current_page = request.GET.get(‘p‘) paginator = CustomPaginator(current_page, 7, USER_LIST, 10) try: posts = paginator.page(current_page) # has_next 是否有下一页 # next_page_number 下一页页码 # has_previous 是否有上一页 # previous_page_number 上一页页码 # object_list 分页之后的数据列表 # number 当前页 # paginator paginator对象 except PageNotAnInteger: posts = paginator.page(1) except EmptyPage: posts = paginator.page(paginator.num_pages) return render(request, ‘index1.html‘, {‘posts‘: posts})
templates-index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title></title> </head> <body> <ul> {% for row in posts.object_list %} <li>{{ row.name }}-{{ row.age }}</li> {% endfor %} </ul> {% include ‘include/pager.html‘ %} </body> </html>
pager.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> {% if posts.has_previous %} <a href="/index1?p={{ posts.previous_page_number }}">上一页</a> {% else %} <a href="#">上一页</a> {% endif %} {% for i in posts.paginator.pager_num_range %} {% if i == posts.number %} <a style="font-size: 30px;" href="/index1?p={{ i }}">{{ i }}</a> {% else %} <a href="/index1?p={{ i }}">{{ i }}</a> {% endif %} {% endfor %} {% if posts.has_next %} <a href="/index1/?p={{ posts.next_page_number }}">下一页</a> {% else %} <a href="#">下一页</a> {% endif %} <span> {{ posts.number }}/{{ posts.paginator.num_pages }} </span> </body> </html>
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