Django中封裝分頁組件
(1) 定義Paginator類
from django.utils.safestring import mark_safe
class Paginator(object):
"""
初始化引數說明：
request：請求物件
data：查詢到的符合條件的資料
search_data：搜索框收索的關鍵字，解決收索情況下分頁的BUG
page_parm：分頁請求的引數名稱，例如：http://127.0.0.1:8000/phonenum/list/?page=2&q=
page_size：每頁顯示的資料量
plus：當前頁分頁按鈕的兩邊顯示的按鈕數量
"""
def __init__(self, request, data, search_data, page_parm="page", page_size=15, plus=5):
page = request.GET.get(page_parm, "")
if page.isdecimal():
page = int(page)
else:
page = 1
self.page = page
self.page_size = page_size
self.start = (page - 1) * page_size
self.end = page * page_size
self.data = https://www.cnblogs.com/minqiliang/p/data[self.start:self.end]
total_count = data.count()
total_page_count, div = divmod(total_count, page_size)
if div:
total_page_count += 1
self.total_page_count = total_page_count
self.plus = plus
self.search_data = search_data
self.page_parm = page_parm
# 生成html標簽
def Html(self):
if self.total_page_count <= 2 * self.plus + 1:
start_page = 1
end_page = self.total_page_count
else:
if self.page < self.plus:
start_page = 1
end_page = 2 * self.plus
else:
if (self.page + self.plus) > self.total_page_count:
start_page = self.total_page_count - 2 * self.plus
end_page = self.total_page_count
else:
start_page = self.page - self.plus
end_page = self.page + self.plus
# 分頁按鈕
page_str_list = []
# 首頁
first_page ='<li><a href="https://www.cnblogs.com/minqiliang/p/?{}={}&q={}">首頁</a></li>'.format(self.page_parm, 1, self.search_data)
page_str_list.append(first_page)
# 上一頁
if self.page > 1:
pre = '<li><a href="https://www.cnblogs.com/minqiliang/p/?{}={}&q={}">上一頁</a></li>'.format(self.page_parm, self.page - 1, self.search_data)
else:
pre = '<li><a href="https://www.cnblogs.com/minqiliang/p/?{}={}&q={}">上一頁</a></li>'.format(self.page_parm, 1, self.search_data)
page_str_list.append(pre)
for i in range(start_page, end_page + 1):
if i == self.page:
ele = '<li ><a href="https://www.cnblogs.com/minqiliang/p/?{}={}&q={}">{}</a></li>'.format(self.page_parm, i, self.search_data,
i)
else:
ele = '<li><a href="https://www.cnblogs.com/minqiliang/p/?{}={}&q={}">{}</a></li>'.format(self.page_parm, i, self.search_data, i)
page_str_list.append(ele)
# 下一頁
if self.page < self.total_page_count:
next = '<li><a href="https://www.cnblogs.com/minqiliang/p/?{}={}&q={}">下一頁</a></li>'.format(self.page_parm, self.page + 1, self.search_data)
else:
next = '<li><a href="https://www.cnblogs.com/minqiliang/p/?{}={}&q={}">下一頁</a></li>'.format(self.page_parm, self.total_page_count,
self.search_data)
page_str_list.append(next)
# 尾頁
last_page = '<li><a href="https://www.cnblogs.com/minqiliang/p/?{}={}&q={}">尾頁</a></li>'.format(self.page_parm, self.total_page_count,
self.search_data)
page_str_list.append(last_page)
search_string = """
<div style="width: 150px;margin-bottom: 20px;display: inline-block">
<form method="get">
<div >
<input type="text" placeholder="請輸入頁碼" name="{}">
<span >
<button type="submit">跳轉</button>
</span>
</div>
</form>
</div>
""".format(self.page_parm)
page_str_list.append(search_string)
page_string = mark_safe("".join(page_str_list))
return page_string
(2) 匯入Paginator類，傳入引數如下所示
def phoneNum_list(request):
"""靚號串列"""
data_dict={}
search_data=https://www.cnblogs.com/minqiliang/p/request.GET.get("q","")
if search_data:
data_dict["phone_num__contains"]=search_data
# 分頁
data = https://www.cnblogs.com/minqiliang/p/PrettyPhoneNum.objects.filter(**data_dict).order_by("level")
page_object=Paginator(request,data,search_data) # 其他三個引數根據需求調整
context={
"data": page_object.data,
"search_data": search_data,
"page_string": page_object.Html()
}
return render(request,"phonenum_list.html",context)
data為查詢到的分頁后的資料，search_data為收索的關鍵字，回傳用于搜索框保留上次搜索的內容，page_string為分頁按鈕
(3) 在前端顯示分頁按鈕
<nav aria-label="...">
<ul >
{{ page_string }}
</ul>
</nav>
轉載請註明出處，本文鏈接：https://www.uj5u.com/houduan/501678.html
標籤：Python
上一篇：<看漫畫學Python：有趣、有料、好玩、好用：全彩版>學Python得找好正確的方法，我一般是邊看漫畫邊學Python