分页功能 封装代码
- 2019 年 10 月 8 日
- 筆記
目录
分页功能 封装代码
分页代码 逻辑和样式
from django.utils.safestring import mark_safe from django.http.request import QueryDict class Pagination: """ 需要参数 page: 当前的页码数(必填) all_count： 总的数据量(可填) per_num ： 每页显示的数据量(选填) max_show： 最多显示的页码数(选填) """ def __init__(self, page, all_count, per_num=10, max_show=11): try: self.page = int(page) if self.page <= 0: self.page = 1 except Exception: self.page = 1 # 总的数据量 all_count = all_count # 每页显示的数据量 10 # 总的页码数 total_num, more = divmod(all_count, per_num) if more: total_num += 1 # 最大显示的页码数 half_show = max_show // 2 if total_num <= max_show: page_start = 1 page_end = total_num else: if self.page - half_show <= 0: # 页码的起始值 page_start = 1 # 页码的终止值 page_end = max_show elif self.page + half_show > total_num: page_end = total_num page_start = total_num - max_show + 1 else: # 页码的起始值 page_start = self.page - half_show # 页码的终止值 page_end = self.page + half_show self.page_start = page_start self.page_end = page_end self.total_num = total_num self.start = (self.page - 1) * per_num self.end = self.page * per_num @property def page_html(self): li_list = [] if self.page == 1: li_list.append( '<li class="disabled"><a aria-label="Previous"> <span aria-hidden="true">«</span></a></li>') else: li_list.append( '<li><a href="?page={}" aria-label="Previous"> <span aria-hidden="true">«</span></a></li>'.format( self.page - 1)) for i in range(self.page_start, self.page_end + 1): if i == self.page: li_list.append('<li class="active"><a href="?page={}">{}</a></li>'.format(i, i)) else: li_list.append('<li><a href="?page={}">{}</a></li>'.format(i, i)) if self.page == self.total_num: li_list.append( '<li class="disabled"><a aria-label="Next"> <span aria-hidden="true">»</span></a></li>') else: li_list.append( '<li><a href="?page={}" aria-label="Next"> <span aria-hidden="true">»</span></a></li>'.format( self.page + 1)) return ''.join(li_list)
View 使用示列
# 公私户,批量操作 class CustomerList(View): def get(self, request, *args, **kwargs): q = self.search(["qq", "name", "phone"]) if request.path_info == reverse('customer_list'): title = '公共客户' all_customer = models.Customer.objects.filter(q, consultant__isnull=True) else: title = '我的客户' all_customer = models.Customer.objects.filter(q, consultant=request.user_obj) page = Pagination(request.GET.get('page', 1), all_customer.count(), request.GET.copy(), 3) return render(request, 'consultant/customer_list.html', {"all_customer": all_customer[page.start:page.end], 'page_html': page.page_html, "title": title}) #传入参数
html 页面引用 bootstrap样式
<script src="bootstrap-3.3.7/css/bootstrap.css"></script> <nav aria-label="Page navigation"> <ul class="pagination"> {{ page_html }} </ul> </nav>
