django自定义分页器
page.py
def __init__(self,current_page_num,all_count,per_age_num=2,pager_count=11)
'''current_page:当前页;all_count:数据库中的数据总条数;per_page_num:每页显示的数据条数;pager_count:最多显示的页码个数
try:
current_page_num=int(current_page_num)
except Exception as e:
current_page_num = 1
if current_page_num<1:
current_page_num =1
self.current_page_num = current_page_num
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_num -1)*self.per_page_num
@property
def end(self):
return(self.current_page_num)*self.per_page_num
def page_html(self):
#如果总页码<11:
if self.all_page<=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_num <= self.pager_count_half:
pager_start =1
pager_end = self.pager_count+1
#当前页>5:
else:
#页码翻到最后
if (self.current_page_num +self.pager_count_half)>self.all_pager:
pager_start = self.all_pager - self.pager_count +1
pager_end = self.all_pager +1
else:
pager_start = self.current_pager_num -self.pager_count_half
pager_end = self.current_page_num + self.pager_count_half+1
page_html_list =[]
first_page = '<li><a href="?page=%s">首页</a></li>'%(1)
page_html_list.append(first_page)
if self.current_page_num <=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_num-1)
page_html_list.append(prev_page)
for i in range(pager_start,paper_end):
if i == self.current_page_num:
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_num >= 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_num + 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)
return ''.join(page_html_list)
views.py
from myapp.page import Pagination
current_page_num = request.GET.get("page")
book_list = Book.objects.all()
pagination=Pagination(current_page_num,book_list.count())
book_list=book_list[pagination.start:pagination.end]
return render(request,"index.html",locals())
index.html
<body>
<ul>
{% for book in book_list %}
<li>{{ book.title }}----{{ book.price }}</li>
{% endfor %}
</ul>
<nav aria-lable="Page navigation">
<ul class="pagination">
{{ pagination.page_html|safe }}
</nav>
</body>
