Django實現基於類的分頁功能

class page:

page_num = 0
total_count = 0
tartype = ""
total_page = 0  # 總頁數
max_page = 11  # 每頁最大展示頁數選項
half_page = max_page // 2
category = ""  # 標記該鏈結所屬分類id，首頁預設為空
def __init__(self, page_num, total_count, tartype, category):
"""初始化函式：接收頁碼數、總資料數，計算總頁碼數並過濾錯誤頁碼資料
:param page_num: 頁碼數
:param total_count: 總資料數
:param tartype: 分類值
:param category: 所屬分類id
"""self.page_num = page_num
self.total_count = total_count
self.tartype = tartype
self.total_page, m = divmod(self.total_count, self.per_page)  # 總頁碼數，餘數為m
if category:
self.category = category
if m:
self.total_page += 1
if self.total_page < self.max_page:
self.max_page = self.total_page
self.half_page = self.max_page // 2
# 過濾錯誤get資料
if self.page_num > self.total_page:
self.page_num = self.total_page
elif self.page_num < 1:
self.page_num = 1
def data_start(self):
return (self.page_num - 1) * self.per_page
def data_end(self):
return self.page_num * self.per_page
def page_html(self):
# 計算頁數選項
page_start = self.page_num - self.half_page
page_end = self.page_num + self.half_page
if page_start <= 1:
page_start = 1
page_end = self.max_page
if page_end >= self.total_page:
page_end = self.total_page
page_start = self.total_page - self.max_page + 1
if self.page_num == 1:
last_page = self.page_num
next_page = self.page_num + 1
else:
if self.page_num == self.total_page:
last_page = self.page_num - 1
next_page = self.page_num
else:
last_page = self.page_num - 1
next_page = self.page_num + 1
print(self.category)
html_str_list = 
'.format(self.tartype, last_page, self.category))
for i in range(page_start, page_end + 1):
if i == self.page_num:
tmp = '{}
'.format(self.tartype, i, self.category, i)
continue
tmp = '{}
'.format(self.tartype, i, self.category, i)
'.format(self.tartype, next_page, self.category))
page_html = "".join(html_str_list)
return page_html

實現思路：建立page類物件，傳入引數為page_num（當前頁碼數）、total_count（總文章數）、tartype（分類值）、category（所屬分類id）【注：tartpe用於區分index頁還是category頁，category為查詢的分類id，index頁時值為空。可以根據自己要實現的功能進行修改】建構函式會計算出總頁碼數並過濾掉錯誤資料。需要實現某功能是直接呼叫類方法即可。

類方法：data_start（）計算出當前頁的文章的起始索引值

data_end（）計算出當前頁的文章的起始索引值

page_html（）返回分頁模組的html**，可直接render到前端。

實現效果：

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