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在django中使用自定義標簽實現分頁功能

2020-01-04 16:56:03
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效果演示:

 django,分頁功能,分頁,自定義標簽實現分頁

github地址:https://github.com/mncu/django_projects/tree/master/django_projects/pagination_test

django,分頁功能,分頁,自定義標簽實現分頁

本例中總頁數為30頁,顯示頁數為12頁,當前頁的前排頁數為4,后排頁數為5

將分頁分為三種情況:

1   當前頁為第1頁到第7頁的時候,無省略頁,且12個位置的內容是不變

2  當前頁為第8頁到第25頁時,位置1與位置2內容不變,當前頁一直處于位置7,

3  當前頁為第25頁到第30頁時,位置1與位置2內容不變,位置8到位置12的內容不變,當前頁在位置8到位置12之中變換

自定義標簽代碼:

from django import templateregister = template.Library()@register.assignment_tagdef pagination(current_page,paginator,num_of_displaypages=10,num_of_backpages=4): # current_page is a django.core.paginator.Page 's instance # paginator is a django.core.paginator.Paginator 's instance # num_of_frontpages = num_of_displaypages - num_of_backpages -3 html='' # 當總頁數小于等于 顯示頁數 時,則將總頁數全部顯示 if paginator.num_pages <= num_of_displaypages :  for i in range(1,paginator.num_pages+1):   html+= '<li ><a href="?page=%s" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >%s </a></li>'%(i,i)  return html # 第一種情況  elif current_page.number <= num_of_displaypages-num_of_backpages:  for i in range(1,num_of_displaypages+1):   html+= '<li ><a href="?page=%s" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >%s </a></li>'%(i,i)  return html # 第二種情況 elif num_of_displaypages-num_of_frontpages <= current_page.number <= paginator.num_pages-num_of_backpages :  html = '''   <li><a href="?page=1" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >1</a></la>   <li class="disabled"><a href="?page=1" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >...</a></la>  '''  for i in range(current_page.number-num_of_frontpages,current_page.number+num_of_backpages+1):   html+='<li><a href="?page=%s" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >%s</a></la>'%(i,i)  return html # 第三種情況 else:  html = '''   <li><a href="?page=1" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >1</a></la>   <li class="disabled"><a href="?page=1" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >...</a></la>  '''  for i in range(paginator.num_pages-num_of_backpages-num_of_frontpages,paginator.num_pages+1):   html+='<li><a href="?page=%s" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >%s</a></la>'%(i,i)  return html

來看html代碼

{% load mytags %}<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title> <!-- 新 Bootstrap 核心 CSS 文件 --> <link rel="stylesheet" href="http://cdn.bootcss.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="external nofollow" > <!-- 可選的Bootstrap主題文件(一般不用引入) --> <link rel="stylesheet" href="http://cdn.bootcss.com/bootstrap/3.3.0/css/bootstrap-theme.min.css" rel="external nofollow" > <!-- jQuery文件。務必在bootstrap.min.js 之前引入 --> <script src="http://cdn.bootcss.com/jquery/1.11.1/jquery.min.js"></script> <!-- 最新的 Bootstrap 核心 JavaScript 文件 --> <script src="http://cdn.bootcss.com/bootstrap/3.3.0/js/bootstrap.min.js"></script></head><body>{{ current_page.object_list }} <nav>  <ul class="pagination">  {% if current_page.has_previous %}  <li ><a href="?page={{ current_page.previous_page_number }}" rel="external nofollow" >上一頁 <span class="sr-only">(current)</span></a></li>  {% endif %}  {% pagination current_page paginator 12 5 as page_list %} <!-- 引用自定義標簽,并傳入參數 -->  {{ page_list|safe }} <!-- 顯示 -->  {% if current_page.has_next %}  <li><a href="?page={{ current_page.next_page_number }}" rel="external nofollow" >下一頁 <span class="sr-only">(current)</span></a></li>  {% endif %}  </ul> </nav><script> $(document).ready(function(){  $('.pagination li a').each(function(){   if ( $(this).html() == {{ current_page.number }} ){    $(this).parent().addClass('active')   }  }); })</script></body></html>

看看view函數:

from django.shortcuts import renderfrom django.core.paginator import Paginator, EmptyPage, PageNotAnInteger# Create your views here.def index(request): obj_list = ['page01','page02','page03','page04','page05','page06','page07','page08','page09','page10',    'page11','page12','page13','page14','page15','page16','page17','page18','page19','page20',    'page21','page22','page23','page24','page25','page26','page27','page28','page29','page30',] #create a paginator instance paginator = Paginator(obj_list,1) #Get the page_number of current page current_page_num = request.GET.get('page') try:  current_page = paginator.page(current_page_num) except PageNotAnInteger:  # If page is not an integer, deliver first page.  current_page = paginator.page(1) except EmptyPage:  # If page is out of range (e.g. 9999), deliver last page of results.  current_page = paginator.page(paginator.num_pages) return render(request,'index.html',     {'current_page': current_page,     'paginator': paginator     })

以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支持VEVB武林網。

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