Django分页
1.复杂版
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 e:current_page = 1per_page = 10# 数据总条数total_count = len(data)# 总页码total_page, more = divmod(total_count, per_page)if more:total_page += 1# 页面最多显示多少个页码max_show = 11half_show = int((max_show-1)/2)if current_page <= half_show:show_start = 1show_end = max_showelse:if current_page + half_show >= total_page:show_start = total_page - max_showshow_end = total_pageelse:show_start = current_page - half_showshow_end = current_page + half_show# 数据库中获取数据data_start = (current_page - 1) * per_pagedata_end = current_page * per_pageuser_list = data[data_start:data_end]# 生成页面上显示的页码page_html_list = []# 加首页first_li = '<li><a href="/user_list/?page=1">首页</a></li>'page_html_list.append(first_li)# 加上一页if current_page == 1:prev_li = '<li><a href="#">上一页</a></li>'else:prev_li = '<li><a href="/user_list/?page={}">上一页</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)# 加下一页if current_page == total_page:next_li = '<li><a href="#">下一页</a></li>'else:next_li = '<li><a href="/user_list/?page={}">下一页</a></li>'.format(current_page+1)page_html_list.append(next_li)# 加尾页page_end_li = '<li><a href="/user_list/?page={}">尾页</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.封装保存版
class Pagination(object):def __init__(self, current_page, total_count, base_url, per_page=10, max_show=11):""" :param current_page: 当前页:param total_count: 数据库中数据总数:param per_page: 每页显示多少条数据:param max_show: 最多显示多少页""" try:current_page = int(current_page)except Exception as e:current_page = 1self.current_page = current_pageself.total_count = total_countself.base_url = base_urlself.per_page = per_pageself.max_show = max_show# 总页码total_page, more = divmod(total_count, per_page)if more:total_page += 1half_show = int((max_show - 1) / 2)self.half_show = half_showself.total_page = total_page@propertydef start(self):return (self.current_page - 1) * self.per_page@propertydef end(self):return self.current_page * self.per_pagedef page_html(self):if self.current_page <= self.half_show:show_start = 1show_end = self.max_showelse:if self.current_page + self.half_show >= self.total_page:show_start = self.total_page - self.max_showshow_end = self.total_pageelse:show_start = self.current_page - self.half_showshow_end = self.current_page + self.half_show# 生成页面上显示的页码page_html_list = []# 加首页first_li = '<li><a href="{}?page=1">首页</a></li>'.format(self.base_url)page_html_list.append(first_li)# 加上一页if self.current_page == 1:prev_li = '<li><a href="#">上一页</a></li>'else:prev_li = '<li><a href="{0}?page={1}">上一页</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)# 加下一页if self.current_page == self.total_page:next_li = '<li><a href="#">下一页</a></li>'else:next_li = '<li><a href="{0}?page={1}">下一页</a></li>'.format(self.base_url, self.current_page + 1)page_html_list.append(next_li)# 加尾页page_end_li = '<li><a href="{0}?page={1}">尾页</a></li>'.format(self.base_url, self.total_page)page_html_list.append(page_end_li)return "".join(page_html_list)
3.封装保存版使用指南
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})
