标签:request __init__ rop from url turn models 使用 pager
01、page.py
# from ..models import Article, ArticleUpDown, Article2Tag, Comment, Category, UserInfo, Blog, Tag import copy class Pagination(object): def __init__(self, current_page, all_count, request, per_page=10, max_pager_num=11): """ :param current_page:当前页 :param all_count: 所有数据总数 :param request: :param per_page: 每一页显示的数据条数 :param max_pager_num: 这个页面最多显示的页码数量 num_pages:总数据所分页的总页面数 """ # 减少小于的时候,让其展示页面1的数据 try: current_page = int(current_page) except Exception as e: current_page = 1 if current_page < 1: current_page = 1 self.current_page = current_page self.all_count = all_count self.per_page = per_page # 每一页显示的数据条数 # 计算总页数 print("计算",all_count,per_page) num_pages, tmp = divmod(all_count, per_page) # 多的一条数据也展示一页 print(num_pages,tmp) if tmp: num_pages += 1 self.num_pages = num_pages self.max_pager_num = max_pager_num # 最大显示的页数 self.page_count_half = int((self.max_pager_num - 1) / 2) # 最多显示页数的一半 self.params = copy.deepcopy(request.GET) print("urlencode", self.params.urlencode()) @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): # 如果总页数小于11 if self.num_pages <= self.max_pager_num: pager_start = 1 pager_end = self.num_pages + 1 else: if self.current_page <= self.page_count_half: pager_start = 1 pager_end = self.max_pager_num + 1 # 当前页大于5 elif (self.current_page + self.page_count_half) > self.num_pages: pager_start = self.num_pages - self.max_pager_num + 1 pager_end = self.num_pages + 1 else: pager_start = self.current_page - self.page_count_half pager_end = self.current_page + self.page_count_half + 1 page_html_list = [] # 首页 上一页标签 self.params["page"] = 1 first_page = ‘<nav aria-label="Page navigation"><ul class="pagination"><li><a href="?%s">首页</a></li>‘ % ( self.params.urlencode(),) page_html_list.append(first_page) if self.current_page <= 1: prev_page = ‘<li class="disabled"><a href="#">上一页</a></li>‘ else: self.params["page"] = self.current_page - 1 prev_page = ‘<li><a href="?%s">上一页</a></li>‘ % (self.params.urlencode(),) page_html_list.append(prev_page) # 每一页显示页码 for i in range(pager_start, pager_end): self.params["page"] = i if i == self.current_page: temp = ‘<li class="active"><a href="?%s">%s</a></li>‘ % (self.params.urlencode(), i,) print("1>>",temp) else: temp = ‘<li><a href="?%s">%s</a></li>‘ % (self.params.urlencode(), i) print("2>>", temp) page_html_list.append(temp) # 尾页 下一页 self.params["page"] = self.current_page + 1 if self.current_page >= self.num_pages: next_page = ‘<li class="disabled"><a href="#">下一页</a></li>‘ else: next_page = ‘<li><a href="?%s">下一页</a></li>‘ % (self.params.urlencode(),) page_html_list.append(next_page) self.params["page"] = self.num_pages last_page = ‘<li><a href="?%s">尾页</a></li></ul></nav>‘ % (self.params.urlencode()) page_html_list.append(last_page) print("=======", ‘‘.join(page_html_list)) return ‘‘.join(page_html_list)
02.views.py
from .page import Pagination def pag01(request): print(request.GET) # 总数 all_count = Book.objects.all() current_page = request.GET.get("page") print("2>>", current_page) pagination = Pagination(current_page, all_count.count(), request, per_page=2) print("---", pagination.page_html) # 当前页面的所有数据的显示范围 current_page_obj =Book.objects.all()[pagination.start:pagination.end] print("当前页面的所有数据〉〉",current_page_obj) return render(request, "index.html", locals())
03、index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>自定义分页器</title> <!-- 最新版本的 Bootstrap 核心 CSS 文件 --> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous"> </head> <h1>自定义分页器</h1> <body> <div> <ul> {% for book in current_page_obj %} <li>{{ book.title }}:{{ book.price }}</li> {% endfor %} </ul> </div> <div class="page_region pull-right"> {{ pagination.page_html|safe }} </div> </body> </html>
标签:request __init__ rop from url turn models 使用 pager
原文地址:https://www.cnblogs.com/one-tom/p/13121229.html