【1】封账分页器功能
class Pagination(object):
def __init__(self, current_page, all_count, per_page_num=2, pager_count=11):
"""
封装分页相关数据
:param current_page: 当前页
:param all_count: 数据库中的数据总条数
:param per_page_num: 每页显示的数据条数
:param pager_count: 最多显示的页码个数
"""
try:
current_page = int(current_page)
except Exception as e:
current_page = 1
if current_page < 1:
current_page = 1
self.current_page = current_page
self.all_count = all_count
self.per_page_num = per_page_num
# 总页码
all_pager, tmp = divmod(all_count, per_page_num)
if tmp:
all_pager += 1
self.all_pager = all_pager
self.pager_count = pager_count
self.pager_count_half = int((pager_count - 1) / 2)
@property
def start(self):
return (self.current_page - 1) * self.per_page_num
@property
def end(self):
return self.current_page * self.per_page_num
def page_html(self):
# 如果总页码 < 11个：
if self.all_pager <= self.pager_count:
pager_start = 1
pager_end = self.all_pager + 1
# 总页码 > 11
else:
# 当前页如果<=页面上最多显示11/2个页码
if self.current_page <= self.pager_count_half:
pager_start = 1
pager_end = self.pager_count + 1
# 当前页大于5
else:
# 页码翻到最后
if (self.current_page + self.pager_count_half) > self.all_pager:
pager_end = self.all_pager + 1
pager_start = self.all_pager - self.pager_count + 1
else:
pager_start = self.current_page - self.pager_count_half
pager_end = self.current_page + self.pager_count_half + 1
page_html_list = []
# 添加前面的nav和ul标签
page_html_list.append('''
<nav aria-label='Page navigation>'
<ul class='pagination'>
''')
first_page = '<li><a href="?page=%s">首页</a></li>' % (1)
page_html_list.append(first_page)
if self.current_page <= 1:
prev_page = '<li class="disabled"><a href="#">上一页</a></li>'
else:
prev_page = '<li><a href="?page=%s">上一页</a></li>' % (self.current_page - 1,)
page_html_list.append(prev_page)
for i in range(pager_start, pager_end):
if i == self.current_page:
temp = '<li class="active"><a href="?page=%s">%s</a></li>' % (i, i,)
else:
temp = '<li><a href="?page=%s">%s</a></li>' % (i, i,)
page_html_list.append(temp)
if self.current_page >= self.all_pager:
next_page = '<li class="disabled"><a href="#">下一页</a></li>'
else:
next_page = '<li><a href="?page=%s">下一页</a></li>' % (self.current_page + 1,)
page_html_list.append(next_page)
last_page = '<li><a href="?page=%s">尾页</a></li>' % (self.all_pager,)
page_html_list.append(last_page)
# 尾部添加标签
page_html_list.append('''
</nav>
</ul>
''')
return ''.join(page_html_list)
【2】后端
from libs.CommonPagination import Pagination
def home(request, *args, **kwargs):
article_data = Article.objects.all()
# 获取到当前的页数
current_page = request.GET.get("page", 1)
# 获取到当前数据量的总数
all_count = article_data.count()
# 生成分页器对象
page_obj = Pagination(current_page=current_page, all_count=all_count, per_page_num=5)
# 对源数据进行切割
page_queryset = article_data[page_obj.start:page_obj.end]
return render(request, "home.html", locals())
【3】前端
<div class="container">
<div class="row">
<div class="col-md-8 col-md-offset-2">
{% for book in page_queryset %}
<p>{{ book.title }}</p>
{% endfor %}
|safe 过滤器确保 HTML 内容作为安全 HTML 进行渲染
{{ page_obj.page_html|safe }}
</div>
</div>
</div>
{# 中间部分放所有用户的文章内容 #}
<div class="col-md-8">
{% block content_main %}
{# 遍历循环的是已经切割过后的数据而不是 原始的数据 #}
{# {% for article_obj in article_data %} #}
{% for article_obj in page_queryset %}
<h4 class="media-heading"><a href="">{{ article_obj.title }}</a></h4>
<div class="media">
<div class="media-left">
<a href="#">
{# 获取到当前文章对象对应的用户头像： 文章表和个人站点绑定，个人站点又和用户绑定 #}
<img class="media-object" data-src="holder.js/64x64" alt="64x64"
src="/media/{{ article_obj.blog.userinfo.avatar }}/"
data-holder-rendered="true"
style="width: 64px; height: 64px;">
</a>
</div>
<div class="media-body">
{{ article_obj.desc }}
</div>
<br>
<div class="media-bottom">
<a href="/{{ article_obj.blog.userinfo.username }}/"
style="margin-right: 10px">{{ article_obj.blog.userinfo.username }}</a>
<span style="margin-right: 10px">{{ article_obj.create_time|date:"Y-m-d H:i:s" }}</span>
<a href=""><span class="glyphicon glyphicon-thumbs-up"
style="margin-right: 10px">{{ article_obj.up_num }}</span></a>
<a href=""><span class="glyphicon glyphicon-thumbs-down"
style="margin-right: 10px">{{ article_obj.down_num }}</span></a>
<a href=""> <span class="glyphicon glyphicon-comment"
style="margin-right: 10px">{{ article_obj.comment_num }}</span></a>
</div>
</div>
<hr>
{% endfor %}
<div class="text-center">
{{ page_obj.page_html|safe }}
</div>
{% endblock %}
</div>
