Django如何在views视图中做分页
Posted forsaken627
tags:
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场景模拟
class Teacher(models.Model):
name = models.CharField(max_length=32)
class UserInfo(models.Model):
username = models.CharField(max_length=32)
QQ = models.CharField(max_length=16)
class_name = models.CharField(max_length=32)
c_time = models.DateTimeField(auto_now_add=True)
status = models.IntegerField()
teacher = models.ForeignKey(Teacher)1.urls.py
url(r'^index/', views.index),2.views.py
def page_list_return(total, current=1):
"""
page
分页，返回本次分页的最小页数到最大页数列表
"""
min_page = current - 2 if current - 4 > 0 else 1
max_page = min_page + 4 if min_page + 4 < total else total
return range(min_page, max_page + 1)
def pages(post_objects, request):
"""
分页公用函数，返回分页的对象元组
"""
paginator = Paginator(post_objects, 3)
try:
current_page = int(request.GET.get('page', '1'))
except ValueError:
current_page = 1
page_range = page_list_return(len(paginator.page_range), current_page)
try:
page_objects = paginator.page(current_page)
except (EmptyPage, InvalidPage):
page_objects = paginator.page(paginator.num_pages)
if current_page >= 5:
show_first = 1
else:
show_first = 0
if current_page <= (len(paginator.page_range) - 3):
show_end = 1
else:
show_end = 0
# 所有对象,分页器,本页对象,所有页码,本页页码,是否显示第一页,是否显示最后一页
return post_objects, paginator, page_objects, page_range, current_page, show_first, show_end
def index(request):
'''
:param request:
:return:
'''
if request.method == "GET":
queryset = models.UserInfo.objects.all().order_by('id')
post_objects, paginator, page_objects, page_range, current_page, show_first, show_end = pages(queryset, request)
return render(request, 'index.html', locals())实现
- index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="x-ua-compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="/static/bootstrap.min.css">
<title>Title</title>
<style>
.ibox-content {
background-color: #ffffff;
color: inherit;
padding: 15px 20px 20px 20px;
border-color: #e7eaec;
border-image: none;
border-style: solid solid none;
border-width: 1px 0;
}
</style>
</head>
<body>
<div class="wrapper">
<div class="row">
<div class="col-sm-12">
<div class="ibox float-e-margins">
<div class="ibox-title">
<h5> 概览 </h5>
</div>
<div class="ibox-content" >
<div class="">
<a class="btn btn-sm btn-primary add_vendor"> 添加 </a>
<a class="btn btn-sm btn-warning "> 添加 </a>
<form id="search_form" method="get" action="" class="pull-right mail-search">
</form>
</div>
<table class="table table-striped table-bordered table-hover " id="editable" style="margin-top: 10px">
<thead>
<tr>
<th class="text-center">序号</th>
<th class="text-center">姓名</th>
<th class="text-center">QQ号码</th>
<th class="text-center">班级</th>
<th class="text-center">时间</th>
<th class="text-center">状态</th>
<th class="text-center">班主任</th>
<th class="text-center">操作</th>
</tr>
</thead>
<tbody>
{% for item in page_objects %}
<tr class="gradeX">
<td style="display: none">{{ item.map_id }}</td>
<td>{{ forloop.counter }}</td>
<td>{{ item.username }}</td>
<td>{{ item.QQ }}</td>
<td>{{ item.class_name }}</td>
<td>{{ item.c_time|date:"Y-m-d" }}</td>
<td>{{ item.status }}</td>
<td>{{ item.teacher.name }}</td>
<td class="text-center">
<a href="" class="btn btn-xs btn-info">编辑</a>
<button type="button" class="btn btn-xs btn-danger del_item">删除</button>
</td>
</tr>
{% endfor %}
</tbody>
</table>
<div class="row">
<div class="col-sm-6">
<div class="dataTables_info" id="editable_info" role="status" aria-live="polite">
第 {{ page_objects.start_index }} ~ {{ page_objects.end_index }}条 |
总 {{ paginator.count }} 条
</div>
</div>
{% include 'pagintor.html' %}
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>- pagintor.html
<div class="col-sm-6">
<div class="dataTables_paginate paging_simple_numbers" id="editable_paginate">
<ul class="pagination" style="margin-top: 0; float: right">
{% if page_objects.has_previous %}
<li class="paginate_button previous" aria-controls="editable" tabindex="0" id="editable_previous">
<a class="page" href="?page={{ page_objects.previous_page_number }}">Previous</a>
</li>
{% else %}
<li class="paginate_button previous disabled" aria-controls="editable" tabindex="0" id="editable_previous">
<a class="page" href="#">Previous</a>
</li>
{% endif %}
{% ifequal show_first 1 %}
<li class="paginate_button" aria-controls="editable" tabindex="0"><a class="page" href="?page=1" title="第1页">1...</a></li>
{% endifequal %}
{% for page in page_range %}
{% ifequal current_page page %}
<li class="paginate_button active" aria-controls="editable" tabindex="0"><a class="page" href="?page={{ page }}" title="第{{ page }}页">{{ page }}</a></li>
{% else %}
<li class="paginate_button" aria-controls="editable" tabindex="0"><a class="page" href="?page={{ page }}" title="第{{ page }}页">{{ page }}</a></li>
{% endifequal %}
{% endfor %}
{% ifequal show_end 1 %}
<li class="paginate_button" aria-controls="editable" tabindex="0"><a class="page" href="?page={{ p.num_pages }}" title="第{{ page }}页">...{{ p.num_pages }}</a></li>
{% endifequal %}
{% if page_objects.has_next %}
<li class="paginate_button next" aria-controls="editable" tabindex="0" id="editable_next">
<a class="page" href="?page={{ page_objects.next_page_number }}">Next</a>
</li>
{% else %}
<li class="paginate_button next disabled" aria-controls="editable" tabindex="0" id="editable_next">
<a class="page" href="#">Next</a>
</li>
{% endif %}
</ul>
</div>
</div>效果
语法举例
import os
from django.core.paginator import Paginator
objects = ['john','paul','george','ringo','lucy','meiry','checy','wind','flow','rain']<br>
p = Paginator(objects,3) # 3条数据为一页，实例化分页对象
print p.count # 10 对象总共10个元素
print p.num_pages # 4 对象可分4页
print p.page_range # xrange(1, 5) 对象页的可迭代范围
page1 = p.page(1) # 取对象的第一分页对象
print page1.object_list # 第一分页对象的元素列表['john', 'paul', 'george']
print page1.number # 第一分页对象的当前页值 1
page2 = p.page(2) # 取对象的第二分页对象
print page2.object_list # 第二分页对象的元素列表 ['ringo', 'lucy', 'meiry']
print page2.number # 第二分页对象的当前页码值 2
print page1.has_previous() # 第一分页对象是否有前一页 False
print page1.has_other_pages() # 第一分页对象是否有其它页 True
print page2.has_previous() # 第二分页对象是否有前一页 True
print page2.has_next() # 第二分页对象是否有下一页 True
print page2.next_page_number() # 第二分页对象下一页码的值 3
print page2.previous_page_number() # 第二分页对象的上一页码值 1
print page2.start_index() # 第二分页对象的元素开始索引 4
print page2.end_index() # 第2分页对象的元素结束索引 6
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