本文实例为大家分享了Django自定义分页的具体代码,供大家参考,具体内容如下
稳扎稳打版
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def book(request):
# 从URL取参数(访问的页码)
page_num = request.GET.get( "page" )
try :
# 将取出的page转换为int类型
page_num = int(page_num)
except Exception as e:
# 当输入的页码不是正经数字的时候 默认返回第一页的数据
page_num = 1
# 数据库总数据是多少条
total_count = models.Book.objects.all(). count ()
# 每一页显示多少条数据
per_page = 10
# 总共需要多少页码来展示
total_page, m = divmod(total_count, per_page)
if m:
total_page += 1
# 如果输入的页码数超过了最大的页码数,默认返回最后一页
if page_num > total_page:
page_num = total_page
# 定义两个变量从哪里开始到哪里结束
data_start = (page_num - 1) * 10
data_end = page_num * 10
# 页面上总共展示多少页码
max_page = 11
if total_page < max_page:
max_page = total_page
# 把从URL中获取的page_num 当做是显示页面的中间值, 那么展示的便是当前page_num 的前五页和后后五页
half_max_page = max_page // 2
# 根据展示的总页码算出页面上展示的页码从哪儿开始
page_start = page_num - half_max_page
# 根据展示的总页码算出页面上展示的页码到哪儿结束
page_end = page_num + half_max_page
# 如果当前页减一半 比1还小, 不然页面上会显示负数的页码
if page_start <= 1:
page_start = 1
page_end = max_page
# 如果 当前页 加 一半 比总页码数还大, 不然页面上会显示比总页码还大的多余页码
if page_end >= total_page:
page_end = total_page
page_start = total_page - max_page + 1
# 从数据库取值, 并按照起始数据到结束数据展示
all_book = models.Book.objects.all()[data_start:data_end]
# 自己拼接分页的HTML代码
html_str_list = []
# # 加上首页
html_str_list.append( '<li><a href="/book/?page=1" rel="external nofollow" >首页</a></li>' )
# 断一下 如果是第一页,就没有上一页
if page_num <= 1:
html_str_list.append( '<li class="disabled"><a href="#" rel="external nofollow" rel="external nofollow" ><span aria-hidden="true">«</span></a></li>' )
else :
# 不是第一页,就加一个上一页的标签
html_str_list.append( '<li><a href="/book/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><span aria-hidden="true">«</span></a></li>' .format(page_num - 1))
for i in range(page_start, page_end + 1):
# 如果是当前页就加一个active样式类
if i == page_num:
tmp = '<li class="active"><a href="/book/?page={0}" rel="external nofollow" rel="external nofollow" >{0}</a></li>' .format(i)
else :
tmp = '<li><a href="/book/?page={0}" rel="external nofollow" rel="external nofollow" >{0}</a></li>' .format(i)
html_str_list.append(tmp)
# 判断,如果是最后一页,就没有下一页
if page_num >= total_page:
html_str_list.append( '<li class="disabled"><a href="#" rel="external nofollow" rel="external nofollow" ><span aria-hidden="true">»</span></a></li>' )
else :
# 不是最后一页, 就加一个下一页标签
html_str_list.append( '<li><a href="/book/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><span aria-hidden="true">»</span></a></li>' .format(page_num + 1))
# 加上尾页
html_str_list.append( '<li><a href="/book/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" >尾页</a></li>' .format(total_page))
page_html = "" .join(html_str_list)
return render(request, "book.html" , { "all_book" :all_book, "page_html" :page_html})
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book.html
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<!DOCTYPE html>
< html lang = "en" >
< head >
< meta charset = "UTF-8" >
< title >书籍列表</ title >
< link rel = "stylesheet" href = "/static/bootstrap/css/bootstrap.min.css" >
</ head >
< body >
< div class = "container" >
< table class = "table table-bordered" >
< thead >
< tr >
< th >序列号</ th >
< th >ID值</ th >
< th >书名</ th >
< th >时间</ th >
</ tr >
{% for book in all_book %}
< tr >
< td >{{ forloop.counter }}</ td >
< td >{{ book.id }}</ td >
< td >{{ book.name }}</ td >
< td >{{ book.date }}</ td >
</ tr >
{% endfor %}
</ thead >
</ table >
< nav aria-label = "Page navigation" >
< ul class = "pagination" >
{{ page_html|safe }}
</ ul >
</ nav >
</ div >
</ body >
</ html >
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封装保存版
封装保存版
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class Page(object):
def __init__(self, page_num, total_count, url_prefix, per_page=10, max_page=11):
"" "
:param page_num: 当前页码数
:param total_count: 数据总数
:param url_prefix: a标签href的前缀
:param per_page: 每页显示多少条数据
:param max_page: 页面上最多显示几个页码
"" "
self.url_prefix = url_prefix
self.max_page = max_page
# 总共需要多少页码来展示
total_page, m = divmod(total_count, per_page)
if m:
total_page += 1
self.total_page = total_page
try :
# 将取出的page转换为int类型
page_num = int(page_num)
except Exception as e:
# 当输入的页码不是正经数字的时候 默认返回第一页的数据
page_num = 1
# 如果输入的页码数超过了最大的页码数,默认返回最后一页
if page_num > total_page:
page_num = total_page
self.page_num = page_num
# 定义两个变量保存数据从哪儿取到哪儿
self.data_start = (page_num - 1) * 10
self.data_end = page_num * 10
# 页面上总共展示多少页码
if total_page < self.max_page:
self.max_page = total_page
half_max_page = self.max_page // 2
# 页面上展示的页码从哪儿开始
page_start = page_num - half_max_page
# 页面上展示的页码到哪儿结束
page_end = page_num + half_max_page
# 如果当前页减一半 比1还小, 不然页面上会显示负数的页码
if page_start <= 1:
page_start = 1
page_end = self.max_page
# 如果 当前页 加 一半 比总页码数还大, 不然页面上会显示比总页码还大的多余页码
if page_end >= total_page:
page_end = total_page
page_start = total_page - self.max_page + 1
self.page_start = page_start
self.page_end = page_end
@property
def start(self):
return self.data_start
@property
def end (self):
return self.data_end
def page_html(self):
# 自己拼接分页的HTML代码
html_str_list = []
# # 加上首页
html_str_list.append( '<li><a href="{}?page=1">首页</a></li>' .format(self.url_prefix))
# 断一下 如果是第一页,就没有上一页
if self.page_num <= 1:
html_str_list.append( '<li class="disabled"><a href="#"><span aria-hidden="true">«</span></a></li>' )
else :
# 不是第一页,就加一个上一页的标签
html_str_list.append( '<li><a href="{}?page={}"><span aria-hidden="true">«</span></a></li>' .format(self.url_prefix, self.page_num - 1))
for i in range(self.page_start, self.page_end + 1):
# 如果是当前页就加一个active样式类
if i == self.page_num:
tmp = '<li class="active"><a href="{0}?page={1}">{1}</a></li>' .format(self.url_prefix, i)
else :
tmp = '<li><a href="{0}?page={1}">{1}</a></li>' .format(self.url_prefix, i)
html_str_list.append(tmp)
# 判断,如果是最后一页,就没有下一页
if self.page_num >= self.total_page:
html_str_list.append( '<li class="disabled"><a href="#"><span aria-hidden="true">»</span></a></li>' )
else :
# 不是最后一页, 就加一个下一页标签
html_str_list.append( '<li><a href="{}?page={}"><span aria-hidden="true">»</span></a></li>' .format(self.url_prefix, self.page_num + 1))
# 加上尾页
html_str_list.append( '<li><a href="{}?page={}">尾页</a></li>' .format(self.url_prefix, self.total_page))
page_html = "" .join(html_str_list)
return page_html
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封装版使用指南
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def publisher(request):
page_num = request.GET.get( "page" )
total_count = models.Publisher.objects.all(). count ()
# 调用封装的Page类,传入相应的参数
page_obj = Page(page_num, total_count, url_prefix= "/publisher/" , per_page=10, max_page=11)
all_publisher = models.Publisher.objects.all()[page_obj.start:page_obj. end ]
page_html = page_obj.page_html()
return render(request, "publisher.html" , { "publisher" : all_publisher, "page_html" : page_html})
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封装版对应的HTML参考
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<!DOCTYPE html>
< html lang = "en" >
< head >
< meta charset = "UTF-8" >
< title >图书列表</ title >
< link rel = "stylesheet" href = "/static/bootstrap/css/bootstrap.min.css" >
</ head >
< body >
< div class = "container" >
< table class = "table table-bordered" >
< thead >
< tr >
< td >序列号</ td >
< td >ID值</ td >
< td >出版社</ td >
< td >时间</ td >
</ tr >
</ thead >
< tbody >
{% for pub in publisher %}
< tr >
< th >{{ forloop.counter }}</ th >
< th >{{ pub.id }}</ th >
< th >{{ pub.name }}</ th >
< th >{{ pub.date }}</ th >
</ tr >
{% endfor %}
</ tbody >
</ table >
< nav aria-label = "Page navigation" >
< ul class = "pagination" >
{{ page_html|safe }}
</ ul >
</ nav >
</ div >
</ body >
</ html >
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效果图如下:
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://www.cnblogs.com/yanjieli/archive/2018/09/24/9507272.html