Django分页（一）
Django分页（一）
手动实现简单分页
HTML
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <div class="header"> <div> {% for user in user_list %} <li>{{ user.name }} {{ user.age }} </li> {% endfor %} {{ prev_page }}<a href="/index?p={{ prev_page }}">上一页</a> {{ next_page }}<a href="/index?p={{ next_page }}">下一页</a> </div> </div> </body> </html>
Views代码
from django.shortcuts import render,HttpResponse,redirect
from blog.models import *
from django.views import View
# Create your views here.
USER_LIST=[]
for i in range(888):
temp={'name':'root'+str(i),'age':i}
USER_LIST.append(temp)
per_page_count = 10 # 定义每页要显示多少行数据
def get_index(request):
current_page=request.GET.get('p')#获取客户端传过来的参数，得到翻到哪一页
current_page = int(current_page) # 字符--〉数字
start = (current_page - 1) * per_page_count # 定义从哪一行开始
end = current_page * per_page_count # 定义数据在哪一行结束
data = USER_LIST[start:end] # 对数据进行切片
# p=1
# 0,10 0-9
# p=2
# 10,20 10-19
#上一页
prev_page=current_page-1
#下一页
next_page=current_page+1
return render(request,"index.html",{'user_list':data,'prev_page':prev_page,'next_page':next_page})
Django分页简单使用
在html文件下创建include目录，然后把分页功能代码放入其中
使用include引入功能html文件
功能html文件如下：
{% if posts.has_previous %}
<a href="?p={{ posts.previous_page_number }}">Previous</a>
{% endif %}
<span class="current">
Page {{ posts.number }} of {{ posts.paginator.num_pages }}.
</span>
{% if posts.has_next %}
<a href="?p={{ posts.next_page_number }}">Next</a>
{% endif %}
HTML
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <div class="header"> <div> <ul> {% for user in posts.object_list %} <li>{{ user.name }} {{ user.age }} </li> {% endfor %} </ul> {% if posts.has_previous %} <a href="?p={{ posts.previous_page_number }}">Previous</a> {% endif %} <span class="current"> Page {{ posts.number }} of {{ posts.paginator.num_pages }}. </span> {% if posts.has_next %} <a href="?p={{ posts.next_page_number }}">Next</a> {% endif %} <!--{% include 'include/page1.html' %}--> </div> </div> </body> </html>
View代码
from django.shortcuts import render,HttpResponse,redirect
from blog.models import *
from django.views import View
# Create your views here.
USER_LIST=[]
for i in range(888):
temp={'name':'root'+str(i),'age':i}
USER_LIST.append(temp)
per_page_count = 10 # 定义每页要显示多少行数据
from django.core.paginator import Paginator,EmptyPage,PageNotAnInteger
def get_index1(request):
#django分页主要有两个对象：paginator与page对象
#如果这里是表的话models.表名.objects.all()来操作
#将表里所有的内容都放进去，每页显示１０条记录
paginator=Paginator(USER_LIST,10) #实例化Paginator
#全部数据：USER_LIST
#per_page:每页显示条目数量
#count:数据据总个数
#num_pages:总页数
#page_range:总页数的索引范围
#page:page对象(是否有上一页，是否有下一页)
current_page=request.GET.get('p')
current_page = int(current_page) # 字符--〉数字
print(current_page)
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
# print(posts.object_list)
except PageNotAnInteger:#如果输入内容不为整数，传入页面１
posts = paginator.page(1)
except EmptyPage:
posts = paginator.page(paginator.num_pages)
return render(request, 'index1.html', {'posts': posts})
Django分页自定义使用
功能html
{% if posts.has_previous %}
<a href="?p={{ posts.previous_page_number }}">Previous</a>
{% endif %}
{% for i in posts.paginator.page_num_range %}
<a href="?p={{ i }}">{{ i }}</a>
{% endfor %}
{% if posts.has_next %}
<a href="?p={{ posts.next_page_number }}">Next</a>
{% endif %}
HTML
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div class="header">
<div>
<ul>
{% for user in posts.object_list %}
<li>{{ user.name }} {{ user.age }} </li>
{% endfor %}
</ul>
{% include 'include/page1.html' %}
</div>
</div>
</body>
</html>
View代码
class CustomPaginator(Paginator):
def __init__(self, current_page, max_pager_num, *args, **kwargs):
"""
:param current_page: 当前页
:param max_pager_num:最多显示的页码个数
:param args:
:param kwargs:
:return:
"""
self.current_page = int(current_page)
self.max_pager_num = max_pager_num
super(CustomPaginator, self).__init__(*args, **kwargs)
def page_num_range(self):
# 当前页面
# self.current_page
# 总页数
# self.num_pages
# 最多显示的页码个数
# self.max_pager_num
print(1)
if self.num_pages < self.max_pager_num:
return range(1, self.num_pages + 1)
print(2)
part = int(self.max_pager_num / 2)
if self.current_page - part < 1:
return range(1, self.max_pager_num + 1)
print(3)
if self.current_page + part > self.num_pages:
return range(self.num_pages + 1 - self.max_pager_num, self.num_pages + 1)
print(4)
return range(self.current_page - part, self.current_page + part + 1)
def get_index2(request):
current_page = request.GET.get('p')
current_page=int(current_page)
paginator = CustomPaginator(current_page, 11, USER_LIST, 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
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
print(posts.object_list)
except PageNotAnInteger:
posts = paginator.page(1)
except EmptyPage:
posts = paginator.page(paginator.num_pages)
return render(request, 'index2.html', {'posts': posts})
