分頁器元件

這是乙個完善的python後端分頁器**、能解決使用者百分之八十的web應用分頁實現

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 =
1if 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
defstart
(self)
:return
(self.current_page -1)
* self.per_page_num
@property
defend
(self)
:return self.current_page * self.per_page_num
defpage_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 +
1else
:                    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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