第八篇Django分頁
阿新 • • 發佈：2018-04-08
name 數據庫中獲取數據 alex 頁面 base 指南 init RM req 
Django分頁
1.復雜版
data = [] for i in range(1, 302): tmp = {"id": i, "name": "alex-{}".format(i)} data.append(tmp) print(data) def user_list(request): # user_list = data[0:10] # user_list = data[10:20] try: current_page = int(request.GET.get("page")) except Exception as復雜版e: current_page = 1 per_page = 10 # 數據總條數 total_count = len(data) # 總頁碼 total_page, more = divmod(total_count, per_page) if more: total_page += 1 # 頁面最多顯示多少個頁碼 max_show = 11 half_show = int((max_show-1)/2) if current_page <= half_show: show_start= 1 show_end = max_show else: if current_page + half_show >= total_page: show_start = total_page - max_show show_end = total_page else: show_start = current_page - half_show show_end = current_page + half_show # 數據庫中獲取數據 data_start= (current_page - 1) * per_page data_end = current_page * per_page user_list = data[data_start:data_end] # 生成頁面上顯示的頁碼 page_html_list = [] # 加首頁 first_li = ‘<li><a href="/user_list/?page=1">首頁</a></li>‘ page_html_list.append(first_li) # 加上一頁 if current_page == 1: prev_li = ‘<li><a href="#">上一頁</a></li>‘ else: prev_li = ‘<li><a href="/user_list/?page={}">上一頁</a></li>‘.format(current_page - 1) page_html_list.append(prev_li) for i in range(show_start, show_end+1): if i == current_page: li_tag = ‘<li class="active"><a href="/user_list/?page={0}">{0}</a></li>‘.format(i) else: li_tag = ‘<li><a href="/user_list/?page={0}">{0}</a></li>‘.format(i) page_html_list.append(li_tag) # 加下一頁 if current_page == total_page: next_li = ‘<li><a href="#">下一頁</a></li>‘ else: next_li = ‘<li><a href="/user_list/?page={}">下一頁</a></li>‘.format(current_page+1) page_html_list.append(next_li) # 加尾頁 page_end_li = ‘<li><a href="/user_list/?page={}">尾頁</a></li>‘.format(total_page) page_html_list.append(page_end_li) page_html = "".join(page_html_list) return render(request, "user_list.html", {"user_list": user_list, "page_html": page_html})
2.封裝保存版
class Pagination(object): def __init__(self, current_page, total_count, base_url, per_page=10, max_show=11): """ :param current_page: 當前頁 :param total_count: 數據庫中數據總數 :param per_page: 每頁顯示多少條數據 :param max_show: 最多顯示多少頁 """ try: current_page = int(current_page) except Exception as e: current_page = 1 self.current_page = current_page self.total_count = total_count self.base_url = base_url self.per_page = per_page self.max_show = max_show # 總頁碼 total_page, more = divmod(total_count, per_page) if more: total_page += 1 half_show = int((max_show - 1) / 2) self.half_show = half_show self.total_page = total_page @property def start(self): return (self.current_page - 1) * self.per_page @property def end(self): return self.current_page * self.per_page def page_html(self): if self.current_page <= self.half_show: show_start = 1 show_end = self.max_show else: if self.current_page + self.half_show >= self.total_page: show_start = self.total_page - self.max_show show_end = self.total_page else: show_start = self.current_page - self.half_show show_end = self.current_page + self.half_show # 生成頁面上顯示的頁碼 page_html_list = [] # 加首頁 first_li = ‘<li><a href="{}?page=1">首頁</a></li>‘.format(self.base_url) page_html_list.append(first_li) # 加上一頁 if self.current_page == 1: prev_li = ‘<li><a href="#">上一頁</a></li>‘ else: prev_li = ‘<li><a href="{0}?page={1}">上一頁</a></li>‘.format(self.base_url, self.current_page - 1) page_html_list.append(prev_li) for i in range(show_start, show_end + 1): if i == self.current_page: li_tag = ‘<li class="active"><a href="{0}?page={1}">{1}</a></li>‘.format(self.base_url, i) else: li_tag = ‘<li><a href="{0}?page={1}">{1}</a></li>‘.format(self.base_url, i) page_html_list.append(li_tag) # 加下一頁 if self.current_page == self.total_page: next_li = ‘<li><a href="#">下一頁</a></li>‘ else: next_li = ‘<li><a href="{0}?page={1}">下一頁</a></li>‘.format(self.base_url, self.current_page + 1) page_html_list.append(next_li) # 加尾頁 page_end_li = ‘<li><a href="{0}?page={1}">尾頁</a></li>‘.format(self.base_url, self.total_page) page_html_list.append(page_end_li) return "".join(page_html_list)封裝保存版
3.封裝保存版使用指南
def user_list(request): pager = Pagination(request.GET.get("page"), len(data), request.path_info) user_list = data[pager.start:pager.end] page_html = pager.page_html() return render(request, "user_list.html", {"user_list": user_list, "page_html": page_html})View Code
第八篇Django分頁