自定義分頁器

class pagination(object):

def __init__(self,current_page,all_count,per_page_num=2,pager_count=11):
"""封裝分頁相關資料
:param current_page: 當前頁
:param all_count:    資料庫中的資料總條數
:param per_page_num: 每頁顯示的資料條數
:param pager_count:  最多顯示的頁碼個數
用法:queryset = model.objects.all()
page_obj = pagination(current_page,all_count)
page_data = queryset[page_obj.start:page_obj.end]
獲取資料用page_data而不再使用原始的queryset
獲取前端分頁樣式用page_obj.page_html
"""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
# 總頁碼
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):
# 如果總頁碼 < 11個：
if self.all_pager <= self.pager_count:
pager_start = 1
pager_end = self.all_pager + 1
# 總頁碼  > 11
else:
# 當前頁如果<=頁面上最多顯示11/2個頁碼
if self.current_page <= self.pager_count_half:
pager_start = 1
pager_end = self.pager_count + 1
# 當前頁大於5
else:
# 頁碼翻到最後
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 = 
# 新增前面的n**和ul標籤
'''')
return ''.join(page_html_list)

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