封裝的分頁功能
page.py
#!/usr/bin/env python
#-*- coding: utf-8 -*-
#time : 2020/6/7 18:38
#author : eunice
import
refrom django.utils.safestring import
mark_safe
class
mypagenation(object):
def__init__(self, page_num, total_count, base_url, per_page_num=10, page_num_show=5, get_data=none):
""":param page_num: 當前頁碼數
:param total_count: 總的資料量
:param per_page_num: 每頁顯示的行數
:param get_data: 搜尋時的引數
"""self.get_data = get_data #
搜尋條件
self.per_page_num = per_page_num #
每頁顯示10行資料
self.page_num_show = page_num_show #
頁面生成分頁頁碼的數量
self.base_url =base_url
quotient, remainder = divmod(total_count, self.per_page_num) #
quotient商, remainder餘數
#總頁碼數
ifremainder:
page_num_count = quotient + 1 #
有餘數 頁數+1
else
: page_num_count =quotient
self.page_num_count =page_num_count
#相容當前頁碼數
try:
page_num =int(page_num)
except
exception:
page_num = 1
if page_num <0:
page_num = 1
elif page_num > page_num_count: #
相容輸入大於總頁碼的值
page_num = page_num_count #
返回最後一頁
half_num = self.page_num_show // 2
"""3 4 5 6 7 5 6 7 8 9
"""if page_num - half_num <= 0: #
頁碼為負數時
start_num = 1end_num = self.page_num_show #
顯示分頁的
elif page_num + half_num > page_num_count: #
頁碼大於總的頁碼數
start_num = page_num_count - self.page_num_show + 1end_num =page_num_count
else
: start_num = page_num - half_num #
開始頁碼
end_num = page_num + half_num #
結束頁碼
if page_num_count < page_num_show: #
總的頁碼數小於展示的頁碼數
start_num = 1end_num =page_num_count
self.page_num =page_num
self.start_num =start_num
self.end_num =end_num
@property
defcal_start_data(self):
return (self.page_num - 1) *self.per_page_num
@property
defcal_end_data(self):
return self.page_num *self.per_page_num
@property
defhtml_page(self):
page_num_range = range(self.start_num, self.end_num + 1)
page_html = ''
page_pre_html = '
'last_page_html = '
最後一頁
'.format(
self.page_num_count, self.base_url, re.sub(
'page=\d+
', '', self.get_data) if
'page=
'in self.get_data else self.get_data + '
&') #
尾頁標籤
page_html +=last_page_html
page_html +=page_next_html
return mark_safe(page_html)
views.py
defcustomer(request):
get_data = request.get.urlencode() #
search_field=name__contains&kw=%e4%b8%9c
search_field = request.get.get('
search_field
') #
選擇搜尋字段
kw = request.get.get('
kw') #
搜尋關鍵字
ifkw:
#customer_list = models.customer.objects.filter(**)
#另一種實現方式，支援或查詢
q_obj = q() #
q條件查詢的連線符預設是&連線
可以拿到一組關鍵字 q(qq=kw)##
q_obj.connector = 'or' # 修改連線符為or q(qq=kw)|q(name=kw)
customer_list =models.customer.objects.filter(q_obj)
else
: customer_list =models.customer.objects.all()
page_num = request.get.get('
page
') #
獲取當前頁碼數
customer_count =customer_list.count()
per_page_num =settings.per_page_num
page_num_show =settings.page_num_show
base_url = request.path #
訪問的路徑
page_obj =mypage(page_num, customer_count, base_url, per_page_num, page_num_show, get_data)
customer_obj =customer_list.reverse()[page_obj.cal_start_data: page_obj.cal_end_data]
#return render(request, 'saleshtml/customers.html', )
return render(request, '
saleshtml/customers.html
', )
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