Django 分页组件
前言
这个应该是上半年写的一个分页组件。没啥BUG，Python项目里都能用。
class Pagination(object):
"""通用分页组件"""
def __init__(self, totalCount, currentPage, perPageNum=10, maxPageNum=7,):
self.total_count = totalCount # 数据总个数 0
try:
self.current_page = int(currentPage) # 当前页 1
except Exception as e:
self.current_page = 1
if self.current_page <= 0:
self.current_page = 1
self.per_page_item_num = perPageNum # 每页显示的行数
self.max_page_num = maxPageNum # 按钮数量
@property
def start(self):
return (self.current_page - 1) * self.per_page_item_num # 0
@property
def end(self):
return self.current_page * self.per_page_item_num # 0
@property
def num_pages(self):
'''总页数'''
a, b = divmod(self.total_count, self.per_page_item_num)
if not b: # 如果存在多余的数据则多加一页页数
return a
return a + 1
def pager_num_range(self):
if self.num_pages < self.max_page_num:
return range(1, self.num_pages + 1) # range不取后面的值，所以+1
'''下面是数据足够多的情况下'''
part = int(self.max_page_num / 2) # 拿到一半的数据。
if self.current_page <= part:
return range(1, self.max_page_num + 1) # 动态效果
if (self.current_page + part) >= self.num_pages:
return range(self.num_pages - self.max_page_num + 1,self.num_pages + 1)
return range(self.current_page - part, self.current_page + part + 1)
def page_str(self):
"""该方法用于在插件中自动生成页码按钮"""
page_list = []
first_1 = '<ul class="pagination">'
if self.total_count == 0:
first = '<li class="disabled"><a>首页</a></li>'
else:
first = '<li><a href="?p=1">首页</a></li>'
page_list.append(first_1)
page_list.append(first)
# ---------------上一页---------------------#
if self.current_page == 1 or self.total_count == 0:
prev = '<li class="disabled"><a>上一页</a></li>'
else:
# Pyhon3.8新增f语句格式化字符串
# -1
prev = f'<li><a href="?p={self.current_page - 1}">上一页</a></li>'
page_list.append(prev)
# ---------------数据与当前页样式---------------------#
for i in self.pager_num_range():
if i == self.current_page:
temp = f'<li class="active" ><a href="?p={i}">{i}</a></li>'
else:
temp = f'<li ><a href="?p={i}">{i}</a></li>'
page_list.append(temp)
# ---------------下一页---------------------#
if self.current_page == self.num_pages or self.total_count == 0:
nex_t = '<li class="disabled" ><a>下一页</a></li>'
else:
nex_t = f'<li><a href="?p={self.current_page + 1}">下一页</a></li>'
page_list.append(nex_t)
if self.total_count == 0:
last = f'<li class="disabled" ><a>尾页</a></li>'
else:
last = f'<li><a href="?p={self.num_pages}">尾页</a></li>'
page_list.append(last)
last_1 = "</ul>"
page_list.append(last_1)
return ' '.join(page_list)
使用方式
使用很简单，这里就依Django为例。
from django.shortcuts import render
from app01 import models
from utils.page import *
# Create your views here.
def test(request):
currentPage = request.GET.get("p")
res_queryset = models.UserTest.objects.all()
page_obj = Pagination(
totalCount=res_queryset.count(), # 传入数据总数量
currentPage=currentPage, # 当前页
)
page_queryset = res_queryset[page_obj.start:page_obj.end] # 真正显示的数据
return render(request, "test.html", locals())
同时，你还需要在前端进行调用。
<body>
<!-- 展示的数据 -->
{% for user_obj in page_queryset %}
<p>{{user_obj.name}}</p>
{% endfor %}
<!-- 调用自定义分页 -->
{{page_obj.page_str|safe}}
</body>
