python 自定義分頁元件

使用方法

"""

自定義分頁元件的使用方法：
pager_obj = pagination(request.get.get('page',1),len(host_list),request.path_info,request.get)
host_list = host_list[pager_obj.start:pager_obj.end]#每頁顯示的長度
html = pager_obj.page_html()#返回的頁碼
return render(request,'hosts.html',)
"""

class

pagination(object):
def__init__(self, current_page, totalcount, base_url,parmas, per_page_count=10, max_page_count=11):
try:
current_page =int(current_page)
except
: current_page = 1
if current_page < 1:
current_page = 1
#當前頁 self.current_page =current_page
#總記錄數/總條數
self.totalcount =totalcount
#每頁顯示的數量
self.per_page_count =per_page_count
max_page_num, v =divmod(totalcount, per_page_count)
ifv:
max_page_num += 1
#總頁數 self.max_page_num =max_page_num
#顯示頁碼的個數
#頁面上預設顯示11個頁面（當前頁在中間）
self.max_page_count =max_page_count
self.half_page_count = int((self.max_page_count - 1) / 2)
#url字首
self.base_url =base_url
import
copy
parmas=copy.deepcopy(parmas)
print(parmas,'
------******')
self.parmas=parmas
#每頁開始的記錄
@property
defstart(self):
return (self.current_page - 1) *self.per_page_count
#每頁結束的記錄
@property
defend(self):
return self.per_page_count *self.current_page
#頁碼顯示
defpage_html(self):
if self.max_page_num 
page_start = 1page_end =self.max_page_num
else
: 
if self.current_page 
page_start = 1page_end =self.max_page_count
else
: 
if (self.current_page + self.half_page_count) >self.max_page_num:
page_start = self.max_page_num - self.max_page_count + 1page_end =self.max_page_num
else
: page_start = self.current_page -self.half_page_count
page_end = self.current_page +self.half_page_count
html_list =
#首頁self.parmas['
page
'] = 1first_page = '
首頁' %(self.base_url,self.parmas.urlencode())
#if self.current_page == 1:
pre_page='«'
#else
: self.parmas[
'page
'] =self.current_page-1
#pre_page = '« 
'%( self.base_url, self.parmas.urlencode())
for i in range(page_start, page_end + 1):
self.parmas[
'page
'] =i
if i ==self.current_page:
#tmp = "%s" % (self.base_url, self.parmas.urlencode(), i)
tmp='
%s'%(self.base_url, self.parmas.urlencode(), i)
else
: tmp='
%s'%(self.base_url, self.parmas.urlencode(), i)
#if self.current_page ==self.max_page_num:
# next_page='»'
else
: self.parmas[
'page
']=self.current_page+1
#next_page= next_page='
»'%(self.base_url,self.parmas.urlencode())
self.parmas[
'page
']=self.max_page_num
last_url = "
尾頁" %(self.base_url, self.parmas.urlencode())
return
''.join(html_list)

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